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DIY Ultegra Di2 TT
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Since I could not wait the few more months for the TT version of ultegra di2 to come out I decided to try and make my own. Long story short, it can be done fairly simply. Ultegra di2 uses canbus protocol for communicating between the derailluers, shifters, and even the battery mount. So, in order to make tt shifters, I used the STI shifters for its parts. The STI shifters have a small circuit board connected to the x/y shifter buttons on the paddles. The switches on the sti shifters are simple momentary switches with a common and up & down wires (three in total). All that is needed is the small circuit board and the wires coming from it to the paddles. The x/y buttons can be replaced by any momentary switch. For my project, I mounted the circuit board and switches into a section of the aero bar. Satellite shifters can easily be added in by splicing into the new switch circuit. From there, installation for the rest of the components are the same.

A few things I found....the harness is only made up of two wires so if youre good with a soldering iron, you dont need the junction box or 4 separate shimano wires...you only need the plugs and the rest can be made. Additionally, since even the battery mount communicates with the rest of the system, you cant simply put a battery inline like with dura ace di2. You can, however, use your battery of choice and just run the leads to the mount. I placed the mount under the seat and put the battery in the seat post.

It was a fun project and fairly easy. Ill post some pictures below!!






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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Awesome!
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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How much did this cost you? How well does it perform?

.
I'm Phrom Phoenix!
Twitter: @JRCardenasTV
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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very nice! just curious, the small board that you referred to from the shifters. Do you think that was a control board? If so, did you happen to notice if anything looked proprietary? Just wondering if it would be possible to just set up your own board versus cannibalizing a pair of STI shifters (I might have misunderstood, maybe you didn't do that) for the board. I actually didn't think you needed a control board so hopefully I'm misunderstanding you.

Very clean setup. I was debating doing this and was trying to figure out where the best spot for the shifter buttons really is. Would it be where you put it and Shimano puts it would a rocker dpdt switch mounted un the underside at the tip possibly work better. You could even hide the buttons under the bar tape...!
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Re: DIY Ultegra Di2 TT [jayare] [ In reply to ]
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I got everything from nasbar for about 1000. Could probably have pieced it together cheaper by buying of ebay though. As far as performance goes, I dont have the chain on yet but it should perform as well as di2 should since the only thing that was modified was the shifters.
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Re: DIY Ultegra Di2 TT [Tai] [ In reply to ]
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Hello, right now you definitely need to part out the sti shifters. The circuit board (which is probably better described as a black box) converts the signal from the momentaries to canbus. From what ive read, it is proprietary and cant be found off the shelf. I was thinking about using a spdt center off paddle switch but decided on these instead since theyre water proof and easily available. But pretty much any momentary switch will work...for satellite shifters, just wire them in parallel
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Which shifter is the black box in (L or R?)

Styrrell
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Re: DIY Ultegra Di2 TT [styrrell] [ In reply to ]
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They are in both shifters (you can see the black box in the shifter pic i posted). They are small, like about 1 cubic inch and the wires plug directly into them. Come to think of it, a budget build could be done by doing rear shifting only...then all youd need is the r shifter, rear derailleur, and battery mount.
Last edited by: locutus: Jan 31, 12 20:52
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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locutus wrote:
They are in both shifters (you can see the black box in the shifter pic i posted). They are small, like about 1 cubic inch and the wires plug directly into them. Come to think of it, a budget build could be done by doing rear shifting only...then all youd need is the r shifter, rear derailleur, and battery mount.

nice work. in my opinion, one of the best elements of di2 is on a TT/tri bike--shifting at the horns. you can right that up, i'm sure, but it's a really strong aspect of DA di2.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Nice! Can't wait to see how it works with the chain on.

I'm kind of split on whether to just go with a SHIV Comp and wait for Ultegra Di2 to come out (hopefully it will fit) or SHIV Elite/Pro... Your set-up makes me want to wait especially if it's at the $1,000 mark~
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Re: DIY Ultegra Di2 TT [tetonrider] [ In reply to ]
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I agree. I also put momentary switches by the levers (left up, right down). Satellites can be rigged up anywhere. One thing about ultegra that's better than dura ace is the wire diameter...it's only 5mm compared to 8mm which makes routing a lot easier.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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locutus wrote:
I agree. I also put momentary switches by the levers (left up, right down). Satellites can be rigged up anywhere. One thing about ultegra that's better than dura ace is the wire diameter...it's only 5mm compared to 8mm which makes routing a lot easier.

wire diameter on da di2 is 2.5-3.5mm, depending on the wire.

i think you mean connector diameter. the smaller connectors on di2 are ~5.5mm, but some are larger, which is the problem -- it's not the wire diameter.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Really like how open source Di2 is. Great stuff!
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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That is awesome! I have been following a thread over on fairwheel bikes that suggest Di2 ultegra is much tougher to do these mods. I'm glad to see your work.

Keep the info coming
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Very cool
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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shimano is going to be so happy about it...


The entire event (IM) is like "death by 1000 cuts" and the best race is minimizing all those cuts and losing less blood than the other guy. - Dev
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Re: DIY Ultegra Di2 TT [camaleon] [ In reply to ]
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I dont think they will care much. The shift buttons themselves are very cheap, but to get it to work you need to buy a $450 road shifter set to cannabilize for the electronic modules. I doubt many people are going to copy locutus' very nice work. Shimano could have very easily put the electronics in the deraileurs, then you could easily make your own TT shifters. I don't think the descision was by chance.

Now if someone can come up with a reasonably priced control module, then I think shimano might not be happy.

Styrrell
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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PM me your address and I'll send you a couple of the brand new Specialized Hydroflo slowtwitch bottles for starting this very neat thread.




We got a whole box that eventually will find homes in forum users places. :-)
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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nicely done.

2 thumbs up


--
WeBike.us | 2012 IMAZ Race Report
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Thoroughly impressed. Very nice!!!

Hans Bielat
TorHans LLC Co-Founder, Owner, Chief Innovation Officer
http://www.torhans.com
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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locutus wrote:
Ultegra di2 uses canbus protocol
Do you have the spec for the message that are used (and bus rate etc) or did you reverse engineer it? I'm very interested in more details about the electronics if you're willing to share. Cool project!
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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That is totally awesome. I'm guessing you could also use your protocol for a MTN bike XTR version?
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Can you please PM me? I have a few technical questions.


AndyF
http://alphamantis.com
#findyouraero
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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How much damage did you do to the STI levers? Do you think you could rebuild them if necessary?

I'm asking because I'm wondering it this a reasonable approach to take in order to add DIY remote shifting to a road bike with Ultegra Di2: pull the module, solder on additional leads for more buttons, reinstall the module.

Great work,

Scott

ps. I also wonder if the module might some day be available as part of repair assembly.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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I bet Locutus has a beard.
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Re: DIY Ultegra Di2 TT [RoninSherpa] [ In reply to ]
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Pardon my ignorance regarding Di2, but can the dura ace time trial shifters be used with the ultegra group?
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Re: DIY Ultegra Di2 TT [lemond853] [ In reply to ]
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The electronics disassemble out of the sti without having to destroy anything. There was two torx screws and an e clip. I was trying to hint that one could easily add on remote shifters to ultegra di2 stis by splicing into the wires running from the x/y buttons up under the hoods. It might be tight but should work.
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Re: DIY Ultegra Di2 TT [DC Pattie] [ In reply to ]
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DC Pattie wrote:
That is totally awesome. I'm guessing you could also use your protocol for a MTN bike XTR version?

As long as there is room to tuck away the little modules and a place for a couple momentary switches, it would work
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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This is bad ass.
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Re: DIY Ultegra Di2 TT [Aralo] [ In reply to ]
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Aralo wrote:
locutus wrote:
Ultegra di2 uses canbus protocol

Do you have the spec for the message that are used (and bus rate etc) or did you reverse engineer it? I'm very interested in more details about the electronics if you're willing to share. Cool project!

Sorry, this particular method didnt really involve reverse engineering anything. The exisiting electronics from the STIs were used and the shimano x/y buttons were swapped out for momentary spst switches. I did hook the system up to a scope when i bench tested everything and was able to see very rapid voltage spikes and drops which I am guessing is how everything communicates.
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Re: DIY Ultegra Di2 TT [styrrell] [ In reply to ]
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styrrell wrote:
I dont think they will care much. The shift buttons themselves are very cheap, but to get it to work you need to buy a $450 road shifter set.


The STIs can be found new for $340...probably cheaper used. Still some what spendy but a huge savings over dura ace di2 all together
Last edited by: locutus: Feb 1, 12 9:48
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Re: DIY Ultegra Di2 TT [AndyF] [ In reply to ]
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Totally unrelated, but why do people ask others to PM them, when they want to ask a question?

You have the question, you initiate the contact???
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Re: DIY Ultegra Di2 TT [nickwisconsin] [ In reply to ]
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No. Ultegra shifters can not be used with the Dura Ace system or vice versa. The electronics are set up differently.
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Re: DIY Ultegra Di2 TT [nickwisconsin] [ In reply to ]
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No those have different wiring and they don't have (or need) the electronic brain. The brains for DA are in the derailleurs and the buttons are dumb, but this requires more wires going from button to derailleur.

Styrrell
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Heres a few more pictures:

Side view:


Battery mount under seat. Leads are ran into a tiny hole into the seat post where the battery is housed.


Front:

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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Did you make that behind the saddle bottle mount? It looks great!
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Re: DIY Ultegra Di2 TT [timskee] [ In reply to ]
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timskee wrote:
Did you make that behind the saddle bottle mount? It looks great!

Yes, home made with carbon fiber. Making flat things out of carbon was surprisingly easy.
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Re: DIY Ultegra Di2 TT [sentania] [ In reply to ]
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sentania wrote:
Totally unrelated, but why do people ask others to PM them, when they want to ask a question?
You have the question, you initiate the contact???

Suppose you see an interesting post and want to talk to that person. But they're not set up for PM. How would *you* solve that problem?


AndyF
http://alphamantis.com
#findyouraero
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Re: DIY Ultegra Di2 TT [AndyF] [ In reply to ]
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Locutus appears to receive personal messages.
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Re: DIY Ultegra Di2 TT [sentania] [ In reply to ]
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sentania wrote:
Locutus appears to receive personal messages.

I may have missed the PM button, I guess. I scanned for it initially, of course, but didn't see it. My apologies, sentania. I didn't mean to pollute the board.


AndyF
http://alphamantis.com
#findyouraero
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Re: DIY Ultegra Di2 TT [AndyF] [ In reply to ]
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Personally I don't care, I just have never understood why people always ask others to PM them.... with the acceptance of PMs indicating desire to be contact directly or not, combined with the presence of an email address providing a preferred means...

/shrug
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Re: DIY Ultegra Di2 TT [sentania] [ In reply to ]
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sentania wrote:
Personally I don't care, I just have never understood why people always ask others to PM them.... with the acceptance of PMs indicating desire to be contact directly or not, combined with the presence of an email address providing a preferred means...
/shrug

Got it. I just missed seeing the PM button this time. I had simply forgotten where it was.

Maybe, in a way, this also helps you understand why people do this. (If your browser is stretched out, the PM button is waaaaaaaay over in the bottom right, whereas all the other user info is located on the left side.


AndyF
http://alphamantis.com
#findyouraero
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Re: DIY Ultegra Di2 TT [AndyF] [ In reply to ]
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The color scheme on those buttons could use some work....
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Locutus,

Based on your tinkering, do you need to use a front derailluer with Ultegra? Could you run a single chainring with out using the front der?

What shimano parts did you buy?

It looks like you used the Cateye remote buttons, right?

Thanks for posting and putting up with all our questions.

Scott
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Re: DIY Ultegra Di2 TT [lemond853] [ In reply to ]
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Hello, I'll double check tonight but I'm fairly sure the front derailleur is not needed and you can run just the rear. The shimano parts I bought were the front and rear drailleur, battery mount, shifters and front harness connecting the two shifters (this could be made but you would lose the ability to adjust the derailluers and the battery level function).

I ordered some small water proof spst momentary switches...they were only $1 ea. I didn't use the cat eyes because they are more of a surface mount switch.
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Re: DIY Ultegra Di2 TT [lemond853] [ In reply to ]
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lemond853 wrote:
Locutus,

Based on your tinkering, do you need to use a front derailluer with Ultegra? Could you run a single chainring with out using the front der?

Just checked...everything works fine with only the rear derailler and shifter so you could use a single chainring up front with no problem.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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locutus wrote:
Heres a few more pictures:

Side view:


Battery mount under seat. Leads are ran into a tiny hole into the seat post where the battery is housed.


Front:

just want to applaud your ingenuity, again, and say that's a nice looking setup! also, your homemade shifters are shorter than the shimano ones (da di2, at least....presumably shorter than the ulty TT shifters will be, too, whenever they appear). doesn't matter for tri purposes but could matter for TTs (UCI regs).
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Locutus,

Thanks for the thread. This has got me really interested in ultegra Di2.

So, while walking the dog in the snow this evening, I started wondering how I could do this with my TT bike. I am happy about putting two buttons on each of the aero bars but am not sure that I have space to make it easy to do with the bulhorns (I am not sure how long the internal bits of the brake levers are). This got me thinking along the following:

1. Why do I need two buttons for the front derailleur? One button by itself would be fine as all you need it to do is to move the other way (i.e. if it is on the big chain ring, it just needs to go down to the small one and vice versa). I didn't think any more about that though because...

2. Why can't I just get away with four buttons (one "up" on left aero and left bullhorn, and one "down" on each of the right ones)? Basically, why can't I sequentially shift up and down without having to think about whether I am moving the front or rear derailleur.

After I got to the sequential idea, I gave up on 1 as it sounded a lot better!

For the final year of my engineering degree (well over twenty years ago now) I built a boat about 1m long that had a tiny Z80 computer in there that took instructions from a PC on the shore (steer 270 degrees, "slow") and it controlled a fancy rudder that I made (Kitchen rudder controlled by two servos), an electric engine and read the inputs going into a LCD on a fluxgate compass. Based on what it read, it speeded up, turned right, etc.

Things must have moved on a lot since then (no more assembler language or Modula-2) but it can't be too hard to program a microcontroller (Android phone?) to know what gearing you have on the bike, what gear you are in at any time and then (based on whether it gets an "up" or "down" command and the gearing table) change up or down. A short press could mean just one change, a longer press could mean make sure you are in the biggest or smallest chainring).

To get it to fit in with the Ultegra Di2 stuff that you have found you would need to get the microcontroller to take inputs from the up/down buttons (nothing to do with Di2). That's easy. The program would read these and then close one of four momentary switches into the little "black" boxes that you discovered in the shifters (e.g. if the input is "down" and it decides just to move the rear derailleur down then it virtually closes the momentary switch to the "black" box that normally deals with "down" - if it decides it needs to change chain rings it virtually closes the "down" switch to both front and rear derailleur).

Saying it like this doesn't sound too hard. And I don't think it is. You (or me, or whoever) just need to do what you did but insert a little computer between your new momentary switches and the two "black" boxes.

The question for me then is do I want to spend a lot of money on Ultegra Di2? Not sure yet but I have just bought four buttons...

Out of interest, if you have a photo of the switches on the bullhorns, I'd love to see how you have done them.
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Re: DIY Ultegra Di2 TT [Dead Keen] [ In reply to ]
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The guys at Fair Wheel bikes have already done most of this creating a custom programmed sequential shift mtn bike using DA Di2.

One of the reasons that you can't use just one button for the front in a stock format is that you'd, as you noted, need a logic board to interpret the if/then logic on which way to shift the front depending on current position. Plus, honestly, I don't know if this would be a good idea as I know at least in my own case, I've been in the "what front ring am I in?? well I'll just try to shift to the ring I want to be in without looking to make sure that's where I am..." position and if I say I was trying to get to the big ring and was already there... well a single button push would obviously suck.
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Re: DIY Ultegra Di2 TT [Dead Keen] [ In reply to ]
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Hello,

As was mentioned earlier, sequential shifting has been developed for DA di2. Problem is the communication protocol is different than ultegra di2 so in order to work in sequential shifting for ultegra, a whole new system would have to be developed. It is a neat idea so its definitely something i would like to attempt. Theres two ways of approaching it: one is the way you suggested, the other would be to build a controller that uses canbus itself and will therefore do away with the need of the "black boxes". Right now, i am still in the process of decoding how the system is communicating. Placing a controller in line with the black boxes would be the easiest but probably the bulkiest option and keeping things internal is a priority.

Half the fun of having a di2 system is looking for ways to modify it....and i definitely like the challenge. Be sure to update with anything you develop!!

For the bullhorn shifters, I used the cateye remote buttons. They are small, flat, surface mount, tactile switches. I use vision levers and found there was plenty of room for two on each one. The good thing about those buttons is that they are surface mount...you can still run the wires internal but mounting the switches doesn't require drilling and can be placed anywhere. I will take some pictures and post them here when I get home.

Thank you for suggesting these ideas and have fun on your project!
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Locutus, did you use the Ultegra Di2 system checker at all when you did this? If not, it's probably something you would like a bit. Lets you change around function of the buttons, reprogram shift points, etc...
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Meet the man behind the DIY Shimano Di-2 Ultegra TT shifters. Our random age grouper of the week.

http://www.slowtwitch.com/...ave_Toshio_2563.html

H
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Re: DIY Ultegra Di2 TT [Herbert] [ In reply to ]
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Hey,

is it possible to use the DA shifter and levers and connect them with the Ultegra System?
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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Ultegra and Dura Ace electronic are not compatible
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Re: DIY Ultegra Di2 TT [Herbert] [ In reply to ]
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Herbert wrote:
Ultegra and Dura Ace electronic are not compatible

Even the shifters?
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Re: DIY Ultegra Di2 TT [Bogusdogs] [ In reply to ]
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Why do you think someone did this DIY Ultegra project for the TT shifters? Yes the shifters don't work.
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Re: DIY Ultegra Di2 TT [Herbert] [ In reply to ]
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Why is it impossible to connect the shifter with the Ultegra cable in some way??? There must be a way to bridge this issue.
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Re: DIY Ultegra Di2 TT [Herbert] [ In reply to ]
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I think it's more about cost saving? If you wanted to use the DA shifters, you would need to buy both the DA Di2 TT shifters and brake levers/shifters AND the Ultegra Di2 brake levers/shifters, then extract the black boxes from the Ultegra units to use in conjunction with the DA Di2 shifters. As I understand it, this would work because I think the DA Di2 shifters are just a plain switch like you need to interface to the Ultegra Di2 black boxes? But it would be extremely expensive compared to the DIY approach in the OP, and you may as well just buy the full DA Di2 groupset if you were going to do that.
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Re: DIY Ultegra Di2 TT [Herbert] [ In reply to ]
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Herbert wrote:
Why do you think someone did this DIY Ultegra project for the TT shifters? Yes the shifters don't work.

I figured it was the same reason you never saw "Ultegra" bar end shifters on the mechanical 10 speed. There really isn't much to them.


I don't know why people do a lot of things on this forum. Simple question really.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Thanks for this.

I've been doing a bit more digging around and looking at prices and so on. My thinking so far:

1. If I do it, there's obviously a risk of breaking something expensive. I guess that is partly mitigated by there being some sort of chance that some shimano TT shifters will come out some time and so if I only break the shifter controllers its not too bad. The cateye remote buttons aren't available in the UK from what I can see but I know what you mean now so I could create my own.

2. I like the sequential shifting mountain bike that has already been developed. That's got to be the way to go. There seems to be two ways of doing that. The inline way and the canbus way.

3. Starting with the inline way, at the simplest, I just need to come up with a decision tree to move the front and/or rear derailleur depending on what gear I am in and whether it is an "up" or "down" command. However, I am not that good at doing that with simple components (I'm bound to get it wrong n+1 times) and so I was looking at an Arduino. This is a cheap open source prototyping platform. It is easily programmable and has built in input/output ports. I need to do some more reading but it seems like it should be relatively straightforward to get it to read two inputs and change four outputs. It's also got the handy feature of working on the same voltage as the shimano battery. There's also quite a bit of open source code for it to give me clues how to programme it (e.g. debouncing buttons). I would guess one of the problem will be waterproofing it and making it reliable. It will always be a risk doing an ironman with it...

4. The thing about the Arduino is that it also looks like it can be used to sniff out canbus signals. Quite a few people have done work on that in the context of cars and there is an open source project out there to make it easier. So, version 2 would be to try to get the Arduino to decode the shifters and then pretend to be them. Not sure whether that is possible yet though but from what I have read it would seem like it is possible. The Arduino forums are a great source of info for this sort of thing.

5. Out of interest, it seems you can link an Arduino to an ANT/ANT+ module. This, linked to your powermeter and cadence, could get you a fully automatic gearbox. I am sure it would be a completely useless but it couyld be fun trying...
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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DA Di2 was first generation in some ways, and Ultegra offered a chance to rethink some of this. The main difference is they went to
a 2 wire wiring harness with Ultegra Di2 vs the 4 wire harness in DA. Everyone assumes at some time there will be a new rev of DA designed around the
2 wire harness...that is not yet announced but rumored around late 2012.


Until the two systems utilize the same wiring harness, they won't be comparable, hence the need for the 'hacks' like the Ultegra TT shifters.


.

" I take my gear out of my car and put my bike together. Tourists and locals are watching from sidewalk cafes. Non-racers. The emptiness of of their lives shocks me. "
(opening lines from Tim Krabbe's The Rider , 1978
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Re: DIY Ultegra Di2 TT [Sprint_DA] [ In reply to ]
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I did not use the system checker but after looking into its capabilities, it does sound interesting. Looks to be fairly cheap and can check all the components at the same time. Thanks!
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Re: DIY Ultegra Di2 TT [Dead Keen] [ In reply to ]
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Dead Keen wrote:
Thanks for this.

I've been doing a bit more digging around and looking at prices and so on. My thinking so far:

1. If I do it, there's obviously a risk of breaking something expensive. I guess that is partly mitigated by there being some sort of chance that some shimano TT shifters will come out some time and so if I only break the shifter controllers its not too bad. The cateye remote buttons aren't available in the UK from what I can see but I know what you mean now so I could create my own.

2. I like the sequential shifting mountain bike that has already been developed. That's got to be the way to go. There seems to be two ways of doing that. The inline way and the canbus way.

3. Starting with the inline way, at the simplest, I just need to come up with a decision tree to move the front and/or rear derailleur depending on what gear I am in and whether it is an "up" or "down" command. However, I am not that good at doing that with simple components (I'm bound to get it wrong n+1 times) and so I was looking at an Arduino. This is a cheap open source prototyping platform. It is easily programmable and has built in input/output ports. I need to do some more reading but it seems like it should be relatively straightforward to get it to read two inputs and change four outputs. It's also got the handy feature of working on the same voltage as the shimano battery. There's also quite a bit of open source code for it to give me clues how to programme it (e.g. debouncing buttons). I would guess one of the problem will be waterproofing it and making it reliable. It will always be a risk doing an ironman with it...

4. The thing about the Arduino is that it also looks like it can be used to sniff out canbus signals. Quite a few people have done work on that in the context of cars and there is an open source project out there to make it easier. So, version 2 would be to try to get the Arduino to decode the shifters and then pretend to be them. Not sure whether that is possible yet though but from what I have read it would seem like it is possible. The Arduino forums are a great source of info for this sort of thing.

5. Out of interest, it seems you can link an Arduino to an ANT/ANT+ module. This, linked to your powermeter and cadence, could get you a fully automatic gearbox. I am sure it would be a completely useless but it couyld be fun trying...

Dont worry about breaking anything as long as you take your time. The modules will pop right out after you remove the torx screws.

I did look into the automotive canbus systems which do seem to have signal cloning capabilities. The down side is that they are 3 wire shielded systems. From some of the diagrams, the third looks to be a ground but Im not too sure yet. I did order a canbus signal analyzer and software that can interpret the signals as an input. The easy part will be getting the signal...the tough part will be finding a way to clone it. Either way, the first step seems to be interpreting the signal which will be done soon hopefully.

As you can see, all sorts of fun can be had with di2. What type of switches did you end up going with?
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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locutus wrote:
I did look into the automotive canbus systems which do seem to have signal cloning capabilities. The down side is that they are 3 wire shielded systems. From some of the diagrams, the third looks to be a ground but Im not too sure yet. I did order a canbus signal analyzer and software that can interpret the signals as an input. The easy part will be getting the signal...the tough part will be finding a way to clone it. Either way, the first step seems to be interpreting the signal which will be done soon hopefully.
I know some stuff about CAN which might help. The auto industry uses differential (2-wires) CAN-bus because they have all kinds of electronics and have to be robust against noise. Since there are almost no electronics (compared to a car) on a bike I would think that the 3 wires are just Ground, Vcc & CAN-signal. After all the ECU in the STIs also need power so I would expect them to get the Vcc & Ground from the battery. Then the Signal is just single wired which should be plenty. Especially since there is no need for a high data rate. That's all just my guesses but I'd be very curious what's the setup. (my guess is 125 Kbit)

To generate the signals all you need is a uC with a CAN controller. They're super cheap and nowadays there are tons of uC that have one already integrated. I think the Arduino doesn't have any but for such an easy setup with just 1-2 messages you can hook up a controller over SPI or whatnot. I think there are also some projects that already have realized Arduino+CAN.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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What if I only use the housing of the DA TT Shifter and put the cables of the STI`s in, connectin the cable with the buttons? Will this work?
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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Hello, the DA di2 barend shifters are just momentary switches so those could be used with the module from the ultegra shifters. You will need to use the housing and switches, not just the housing though.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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So I will need the cables from the Ultegra STI`s too? For the shifter and the levers? I have to buy two pairs of U STI`s?
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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You will need the Ultegra STIs (one set) and the cable that connects the two (called handlebar harness) as well as some type of momentary switch for shifiting. You can use the DA di2 shifters as the momentary switches but you will still need the parts from the Ultegra STIs. Sorry, its a little confusing at first.

For shifting on the base bar, you can use any type of momentary switch also, even the DA brake/shifters...just wire them to the module the same way as the bar end shifters.
Last edited by: locutus: Feb 8, 12 0:49
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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So to make it clear, I need:

Electronic Kit Ultegra
DA Di2 TT Shifter
DA Di2 TT Levers
Handlebar harness

is that right?
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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The question is whether all that ends up any cheaper than just buying the DA Di2 mechs and cables instead of the Ultegra.
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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Electronic Kit Ultegra (FD, RD, Shifters, junction boxes, battery, battery mount, harnesses).
DA Di2 TT Shifter (or the much much cheaper cateye buttons)

DA Di2 TT Levers (or any momentary buttons, most of which can be much cheaper.)
Handlebar harness


Soldering skills and a bit of nerve.

Styrrell
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Re: DIY Ultegra Di2 TT [Steve Irwin] [ In reply to ]
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Steve Irwin wrote:
The question is whether all that ends up any cheaper than just buying the DA Di2 mechs and cables instead of the Ultegra.

It should. My project cost me about $1000 all together including switches and a LiPo battery. Even if one where to use the DA shifters and brake levers, it will still be cheaper....just not as cheap.
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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Styrrell has it correct. Though the only harness you really need is the handle bar harness since it has the adjustment button and battery level monitor. You can make the rest of the harness and the junction box and save about $100 if you are comfortable with your soldering skills. Like he said, any momentary button (push, tactile, lever, toggle...whatever) can be used to trigger the shifting. But if you dont mind the cost of the DA shifters and levers, you can wire those in in place of the momentaries. Let me know if youd like to see a wiring diagram of how I ended up doing things. If theres interest, I can post it/send it.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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A wiring diagram would be great. I don`t know the buttons you`ve mentioned because I`m from Germany, maybe it is possible to send me any links of those buttons.

Thank you in advance.
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Re: DIY Ultegra Di2 TT [Herbert] [ In reply to ]
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Sounds like somebody needs to take this to market. If Shimano makes no 2 wire TT shifter the market could be huge.
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Re: DIY Ultegra Di2 TT [lightninrod21] [ In reply to ]
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The official Shimano Ultegra electronic TT shifter is supposed to hit stores in September
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Re: DIY Ultegra Di2 TT [Herbert] [ In reply to ]
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Herbert wrote:
The official Shimano Ultegra electronic TT shifter is supposed to hit stores in September

Just in time for another season to have passed.
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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Heres a diagram and some notes:



Also, a link to the cateye buttons which are very popular for this application:
http://www.performancebike.com/...chTerm=cateye+remote
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Fascinating stuff - thanks for all the detail.

Since you are answering questions, and I have not seen this clearly in the thread, how did you manage the brake levers? It is not clear if
you deployed satellite shifters or not on the brakes. If so, could you post pics and provide a bit more detail? From the talk about simple
surface mount, it seems one could splice a shifter switch onto any pursuit/brake combo , such as my Vision setup.

I'm beginning to get enthused on this...

.

" I take my gear out of my car and put my bike together. Tourists and locals are watching from sidewalk cafes. Non-racers. The emptiness of of their lives shocks me. "
(opening lines from Tim Krabbe's The Rider , 1978
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Re: DIY Ultegra Di2 TT [TriDevilDog] [ In reply to ]
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TriDevilDog wrote:
it seems one could splice a shifter switch onto any pursuit/brake combo , such as my Vision setup.

.

Yes, I have the vision levers also and mounted the switches on top and on the side ( so that the thumb can trigger down, finger trigger up). The good thing about these switches is that they are surface mount and small...and can be put any where youre willing to run them. I will take pictures and post soon.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Thanks a lot for this. So I connect the cateyes with the blackbox of the sti for the extensions and then I Need the handlebar harness for shifting at the breaks?
Two pairs of these cateyes are a Lot more cheaper than the DA shifter and levers
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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No sorry, 4 pairs of the cat eyes buttons!?
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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After looking at some shimano tech docs (http://techdocs.shimano.com/...6577569830773904.pdf) it seems that the thing to get is main lever assemblies:
Y6VE98010 right side
Y6VD98010 left side

I wonder when Shimano will start selling replacement parts. Of course, our discussion of this may force them to not sell any replacement parts.

Scott

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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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Cesc wrote:
No sorry, 4 pairs of the cat eyes buttons!?

Hello, You will need a minimum of two pairs (or two double throw switches if you choose). If you want shifting on the base bars, youll need two additional pairs.
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Re: DIY Ultegra Di2 TT [lemond853] [ In reply to ]
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On that tech document I dont see the electronic assembly labeled. The part number you listed seems to be the mechanical parts to the lever assembly. Youre right though: it would be a whole lot easier if shimano sold just the internals.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Heres some more pictures for those who asked. The first couple pictures show the routing for the handlebar harness, third picture show shift buttons on the vision levers (sorry for all the scratches!), fourth show the wiring for the internal battery to the external battery mount under the seat, and the last shows that the ultegra di2 wiring will fit in existing holes with no mods. Im happy to answer anymore questions or take more pictures if you need.






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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Thanks for the idea and info Dave.

The Di2 upgrade kit came on Friday (Euro 999). I resisted doing anything 'til 8pm Saturday and spent two-half hours putting the kit on my Planet X Stealth. I had to use external wiring and took my time but got it working with the STIs (dangling from the aero bars). The battery did mean I lost one of the bottle mounts (or have to use a tiny bottle). I can see the battery getting put in the seat post before too long.

Today I probably spent three hours then making it work with my bars. I couldn't get the cateye remotes in the UK (and the US shop still hasn't delivered) and so I went with a combination of: two momentary push buttons on each of the aero bars and an "(on) off (on)" toggle switch on each of the bull horns. I used some blue tack and tape to keep the toggle switches to front of the brake levers (after removing the rubber caps). To block up the holes in the aero bars I cut up a DVD case and drilled small holes in it for the push buttons.

I didn't bother undoing the torx screws in STI levers, just cut the wire and pulled the "black" box out. I then used three small junction boxes to connect the "up", "down" and ground wires. The "black" box and the junction boxes fit inside the aero tubes.

It rides well. The toggle switches (which go left/right) are intuitive when on the bull horns. The push buttons on the aero bars are less intuitive but I am sure that will come with time. The best bit so far was coming down a hill and turning left just after a parked car. I was on the bull horns and just changed from big to little chain ring, changed the cassette without worrying about getting my hands back to the ends of the aero bars. And the shifting has been good, even changing chainrings while pedalling hard up a hill.

As I have done everything in a bit of a rush, with cheap and ugly switches, I am going to take a bit of time riding it and then decide what switches I want, etc. Then I'll put on the new switches, new bar tape on and get rid of the junction boxes. Oh, and it needs to be more waterproof. I am sure it could handle a bit of rain at the moment but I wouldn't be confident about a long ride on a rainy day.

My spring project will then be to turn it into a "sequential" gear box (i.e. deciding when to move chain rings and cassette at the same time). The programming should be relatively straightforward - I've had a play with it in VBA - and the input/output hardware should be pretty easy and small. The issue then is getting a small microcomputer that will fit into one of the shifters with a battery. The Arduino Nano might just fit the bill (and there actually even smaller ones). Even if I can get it to work though, it would need to be reliable and robust enough to use in the rain. That's going to be the difficult bit.

Here's some photos. Remember, I am still at the "its ugly but works" stage.


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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Firstly may I say what you have done is great and well done on the nerve to try this with relitivly expenceive kit and kudos to you to go on and to produce this thread.

But please, please, please can you and other people who may copy this idea read and take on board what I am about to say.

I flew RC Helicopters before Triathlon and saw the rise of Lipo batterys to the Hobby market.

These batterys have separate cells to make up one "Pack"

LiPo batteries should only be charged on a charger that is specifically compatible with LiPo batteries and some have a built-in cell balancer.

Unbalanced cells within a pack will reach full charge at different times, increasing the chances of one cell being overcharged and causing a fire.

Lithium polymer cells (Lipo) can swell and expand when shorted, charged incorrectly, overcharged, overdischarged, heated, punctured, dropped, kicked, or otherwise mistreated. And the results can be catastrophic as this can also cause fires

LiPo batteries should only be used in conjunction with a low-voltage cutoff or alarm to prevent the pack from being discharged too far (Fire again)

Also never store a LiPo battery at full charge LiPo batteries should be stored with a percentage of its total capacity, usually around 50%. Refer to your batterys instructions on storing the battery safely

Treated properly Lipo batterys are safe and powerfull

When I was flying RC Helis I have seen Lipo fires 1st hand and they are scary, no warning and the things are in flames and belive me they burn.....really burn !!

But hey at the end of the day it may never happen to you and it is your bike after all treat them right and it won't IMO and it's likly not just mine, I wouldn't "hide" one in my pride and joys frame and charge it with any old charger and if for some reason I did (and I wouldn't) the bike would not come in the house it would stay at the bottom of the garden !

If you think however I am taking $hit google lipo battery dangers

(No disrespect to you great job + thread, just making you aware of some potential dangers)
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Re: DIY Ultegra Di2 TT [Dead Keen] [ In reply to ]
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Looking good! Its nice shifting from the bullhorns right? Luckily switches are easy and cheap to swap so if you decide you dont like your current set up, its easy enough to experiment with different buttons. Im not sure what the cost of international shipping is but if youd like, I can pick up some of the cateyes and forward them to you. They worked out great mounting to my levers. Be sure to keep us all updated on your sequential shifting project!
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Hey,

but how do I connect 4 pairs of momentary switches? Can I use two EW-SD50 cables and connect them to the blackbox and the momentary switches? Your diagram shows only the option with two pairs of switches.

Thanks for helping me.
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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You just splice into the three wires from the black box. I modified the diagram to show an example of how it can be done. Let me know if you need help with anything else or want further clarification.

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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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how long is the cable from the blackbox to the STI levers? So, I splice the cables (yellow, grey and purple) and extend them with a normal cable to the break levers?
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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Hello the wires from the black box to the the sti shift buttons are only about 2 inches long so once you remove the black box, you'll need to lengthen the wires. Yes, you just splice in and extend to the brake levers. If you'd like actual pictures of how I did mine, I can take some when I get home. It sounds complicated but is fairly simple once you start things.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Hi,

pictures would be great. Sorry for my questions, but I don`t want to make mistakes.
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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I cut the wire between the "black box" and the switch in the STIs without undoing or unscrewing anything.

Then I joined the wires to my new switches using blocks like this:


I cut the connector blocks into six separate one to make it easier to fit inside the aero bars. Each side (left: chainring, right: cassette) has three blocks (up, down, ground) and I put the end of each of the three "black box" wires into the end of one of the connectors (and screwed it in). Then I screwed in the wires from the two switches (aero bar and bull horn) to the other side of the connector block. So if you look at the connector block, one side has one wire going in (from the "black box") and the other side will have two, three or four wires coming out (two "ups", two "downs" and 2, 3 or 4 grounds, depending on the type of switches you use).

Using connector blocks adds weight, makes things a little harder to waterproof and stuff but makes it very easy to change switches, swap the "up" one for the "down" one, etc. Once I am happy with my switches and set up I will just join the wires direct and get rid of the connector blocks.

Out of interest, I think I like the toggle switches compared with the momentary switches. A few times I have tried to "toggle" the momentary switches on the aero bars and so that is something I might change.
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Re: DIY Ultegra Di2 TT [Cesc] [ In reply to ]
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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This is very cool. My buddy and I have been talking about trying something similar for months and you have inspired me to try it. I have a few more questions. First, Is the battery mount necessary if you plan to run a different battery? Scond, should I get a down tube harness just to use the connectors if I pan to make my own harness and junction connections? And finally, do the di2 derailleurs just have connectors on them or is there a short harness coming off them to solder to? Thanks for all the great information and pictures.
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Re: DIY Ultegra Di2 TT [Jkingham] [ In reply to ]
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I wonder the same thing. Do you really need the battery mount? If you run a different battery like Locutus did, couldn't you simple run the pos-neg wires does to where you join all your wires?
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Re: DIY Ultegra Di2 TT [robjustice] [ In reply to ]
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It's my understanding that there is a CAN controller chip in the battery mount that is required to interface with the system; it doesn't just send constant uninterrupted current. So the Di2 battery mount is required; the battery itself can be third-party.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Carlton Bale wrote:
It's my understanding that there is a CAN controller chip in the battery mount that is required to interface with the system; it doesn't just send constant uninterrupted current. So the Di2 battery mount is required; the battery itself can be third-party.

Thanks Carlton. That is the last bit I needed to get mine set up.
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Re: DIY Ultegra Di2 TT [robjustice] [ In reply to ]
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has anyone else heard of availability problems with DA di2 TT setup? I have been trying to get it for > 2months now from my LBS in FLA. At first it was out of stock for 2 months, then when it came in finally last week, it was apparently external wiring harness not internal. They are now telling me the internal wiring harness is on backorder at wholesaler AND Shimano? My LBS is calling the Shimano rep to see if they can locate this internal harness. when is the Ultegra TT coming out? i might as well wait?

John

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Re: DIY Ultegra Di2 TT [jlafren42] [ In reply to ]
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What do you need exactly? Di2 TT with internal wire? Which length internal? I think I can help you out.
Send me a PM.
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Re: DIY Ultegra Di2 TT [CHPFLY] [ In reply to ]
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this is really nice work,

Formely stef32
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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This is so fun! Thanks for all information. I did this to my newbuilt chinese frameset. Fully internal cable routing.
http://technicmix.bloggplatsen.se/
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Re: DIY Ultegra Di2 TT [allcat] [ In reply to ]
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Christer, that setup looks absolutely awesome, well done on some extremely ingenious and well-thought-out work.
I recommend anyone thinking of DIY Ultegra Di2 to look at what the guy has done on his blog.

-------------------------------
Get the most aero and light bike you can get. With the aero advantage you can be saving minutes and with the weight advantage you can be saving seconds. In a race against the clock both matter.

BMANX
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Re: DIY Ultegra Di2 TT [Barchettaman] [ In reply to ]
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Finding this site is gonna cost me lots of $$$. Check out a Clifford Valet switch. 3 wire with rubber buttons. Would mount nicely in my aerobars.









Last edited by: hellrayzor: Apr 22, 12 7:52
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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I would be very interested to see/ get the diagram, since im about to embark on a P5 / SHIV - TT project, and I believe your Info to be of a vital significance to me right now (national TT championship end of May).

I would greatly appreciate it, cheers so much.
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Re: DIY Ultegra Di2 TT [allcat] [ In reply to ]
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allcat wrote:
This is so fun! Thanks for all information. I did this to my newbuilt chinese frameset. Fully internal cable routing.
http://technicmix.bloggplatsen.se/

What are the details on the frame? Looks much more aero than other Chinese frames I've seen.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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After a bunch of reading this thread and ordering and delays I have finally finished (well mostly) my Shiv Ui2 project. It was not that difficult once I figured out what i wanted to do and use for parts and such. I did run into a few issues that had to be overcome but nothing that difficult. All in all it cam out pretty clean looking and all that is left to wire up the remote switches on the bullhorns. This process will be easy as the wires to the shifter black box are already in place and just need to be connected to the cat eye buttons I have.
Have only done the around the block so far but the shifting is crisp and quick. The bike needs fitting as well. Them stem/spacers are going to get changed and removed as it is too short and too high for now.

Here are the pics.


Here are the custom made shifters. I bought a carbon fiber tube cut and drilled holes for waterproof switches and put the back box inside carbon tube which then slid over the aero extension.


pretty clean cockpit...


and finally the battery lives inside the seat post. This was one of the more difficult parts. I had to cut and grind down battery mount so it would fit down the seat tube. This took a while to get just small enough but once it was it slide right in and the battery is fixed in the post.


A special thanks to Locutus who was a great help with the start of this thread and by patiently answering a number of private messages I sent him.

Now I need to get out and ride!!!

JW (on the comback trail)
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Re: DIY Ultegra Di2 TT [LEGSTRONG] [ In reply to ]
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Hello,

I posted some basic diagrams on how to modify and wire in momentary switches. If youd like, I can email them to you or help you out with specific details. Just let me know! And sorry for the delay in responding!

Dave
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Re: DIY Ultegra Di2 TT [NYCTri] [ In reply to ]
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Looks great! How difficult was it to trim down the battery mount to fit inside your seat tube? Your setup is very clean, good job!
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Hey Dave,

sorry for not coming back to you. I had knee surgery 2 weeks ago. As soon as I will be fit I post some pics of my BMC TM01 with the DIY Ultegra Di2.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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once I commited to making the battery mount smaller it was not so bad. I first removed the locking lever by pushing out the e-clip then removing the rod and platic lever. this is where it got interesting. It was still no where close to fitting. So i started o with some sharp tin snips and cut away anything that looked "extra." It still did not fit. I then used my dremel with a grinding bit to finish it off. It then fit down the seat tube. I soldered some wires to the remaing prongs, heat shrink wrapped connection and attached a plug to match the LiPo battery on the other end. The battery fit snug in te seatpost so I did not have to do much there except put the excess wire up into the seatpost.
I also forgot to mention that I made my shimano wires longer as the longer ones all seem to be out of stock! I will try and take some more pics of the small parts. I will warn you that I did not try to make the stuff I knew would be internal pretty.

JW (on the comback trail)
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Re: DIY Ultegra Di2 TT [NYCTri] [ In reply to ]
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Where's a good place to find waterproof buttons to purchase?

I'm doing a similar project, but I'm really worried about what my sweat is going to do to those buttons.

I've tried a bunch of google searches, but I'm ending up with large waterproof / marine buttons or little ones that aren't.

Is there a good source for this stuff?

Thanks!

Keith
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Re: DIY Ultegra Di2 TT [Keith A] [ In reply to ]
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Re: DIY Ultegra Di2 TT [NYCTri] [ In reply to ]
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We've been installing Ultegra compatible batteries and shrinking the Shimano circuit board down rather small so it fits in the smallest places. Although we need to update on the latest offerings, like a super clean "wireless" front end and remote shifters for both Dura Ace and Ultegra, here's the site: http://www.calfeedesign.com/...iber/di2-retrofit-2/
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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If I'm offered to get a 2-way switchbox on a SHIV TT SHIMANO DA Di2 bike (meaning only extentions will have shifting and not on bull bars) will I be able to proceed and adjust through that configuration the same things as you did (momentary switches on bull bars!) ?
Should I build and buy the bike and MOD it later (that I'm willing to do so!) ?? (purchase pending)

cheers, fantasic job you did , really, phenomenal indeed ....!!
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Can you give more precise dimensions on the size of the modules? I am trying to determine if they will fit in the nose cone of my Felt DA (2010). Thanks.
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Re: DIY Ultegra Di2 TT [LEGSTRONG] [ In reply to ]
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Hello, sorry for the delayed response. If you are using DA Di2 then adding in momentary switches will be relatively easy. You would just wire the momentary switches as shown in the diagrams and splice into the harness going to the aerobar shifters. Depending on the switches used, this can be done for $10 or less.
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Re: DIY Ultegra Di2 TT [Dkblume] [ In reply to ]
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Hello,

I will be able to give you a precise measurements tonight but they are small enough to fit into the aerobar extensions so I would think that it wouldnt be difficult to fit in the nose cone.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Thanks! I would really appreciate that - maybe I can get them in the bars instead - even better!
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Re: DIY Ultegra Di2 TT [Dkblume] [ In reply to ]
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Fitting in the bars is highly dependent on what bars you have. The Ultegra black box would NOT fit into my zip or oval concept round bars. I think they will fit in the profile ones that are larger on the end. I fit mine in the shifters I made out of carbon fiber tubes with a 222mm inside diameter. I also had to shave down the black box a little to get it to fit.
I would check on the size of your bars first.

JW (on the comback trail)
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Have joined the forum just to ask this question. Do you think/know if this will work? I have Cervelo S5 with Ultegra Di2 STI shifters and have clipped-on aero bars and want to get shift buttons on aero extensions. Am thinking about splicing the Cateye remote buttons to an extra Shimano e-wire (cutting off one plug end) and plugging other end into second "input" on STI shifters. Thanks.
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Re: DIY Ultegra Di2 TT [scharebear] [ In reply to ]
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scharebear wrote:
Have joined the forum just to ask this question. Do you think/know if this will work? I have Cervelo S5 with Ultegra Di2 STI shifters and have clipped-on aero bars and want to get shift buttons on aero extensions. Am thinking about splicing the Cateye remote buttons to an extra Shimano e-wire (cutting off one plug end) and plugging other end into second "input" on STI shifters. Thanks.


What you're describing won't work because an encoded signal needs to be sent to the input on the STI shifter. The cateye buttons by themselves won't do this.

One option would be to splice into the wires leading from the contact switches inside your brake levers; the wires are how the internal switches connect to the circuit that sends the encoded shift commands. This would be the cheapest option, but you'll need to open up your existing levers. You would use standard wires, not "Shimano e-wire." Space within the lever and routing of the additional wires to the aero bars may be difficult.

The second option would be to buy an new set of Ultegra Di2 brake levers, remove the circuit board, connect the Cateye buttons to those leads, and then connect the circuit board to the second input on the existing brake levers using a Shimano e-wire. In this setup, the new circuit board would send the encoded shift commands for the aero bar buttons and the cateye buttons would be the inputs. The existing levers would continue to use their own circuit board to send shift commands.

Here's a picture of the circuit "black box" and 3 wires that you will need to either splice into (option 1 - existing levers) or add (option 2 - dismantle new levers)



Last edited by: Carlton Bale: May 29, 12 10:28
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Re: DIY Ultegra Di2 TT [scharebear] [ In reply to ]
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Hello,

Yes, it would work if you spliced into the wires between the black box and x/y (up/down) shift buttons on the levers. I've done this mod before for someone who wanted satellite shifters with the STIs....space is tight in the splice area but can be done with small wires and patience!
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Before you do anything...Are you using Dura Ace Di2 or Ultegra Ui2? They function differently.

JW (on the comback trail)
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Thanks. I thought maybe I would be sending input to STI "black box" to be encoded by the circuit board there.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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The biggest source of confusion for me is the battery charger. I'm building a 1x10 dura ace system and am using a hyperion battery.

What charger are you using?

Scott
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Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [ In reply to ]
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I have finished building up my Scott Plasma 3 TT bike with Ultegra Di2 and I'm really pleased with the results. Many thanks to Locutus, YahamaFX1 and others for their support and advice. I managed to get a great deal on a new 2011 Plasma 3 and went with the Ultegra upgrade requiring only shifters and derailleurs. I'm still running my old Shimano 6601 crank with Q rings and works great. For the "find" of the project, I managed to locate some really sweet rocker momentary (mom on -off- mom on) switches that fit perfectly into the ends of my HED extensions. With this setup I needed only two switches, instead of four, to mount in the extensions and I don't need to press, but rather just rock the switches forward or back to switch gears. Also, the Plasma 3 has a neat little opening above the bottom bracket covered by a metal plate. I drilled out the plate and ran my FD wires and Control box through the modified hole and mounted the control box on top of the bottom bracket. I have an internal battery and full internal cable routing, with only minimal cables and wires exposed in the back of my HED corsair bars. I bought Cateye switches to give me shifting control on the horns, but have not yet installed them. For now I like the clean look of this setup and for the events I ride I think they will have little real benefit. I'll see how it goes and if I decide on them it may be my winter project.

I'll post some pics below.


Last edited by: Dkblume: Jul 4, 12 4:56
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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Dkblume] [ In reply to ]
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Some more pics of my Scott Plasma 3 TT Project:



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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Dkblume] [ In reply to ]
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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Dkblume] [ In reply to ]
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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Dkblume] [ In reply to ]
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Dkblume: Your bike looks amazing, especially with the near invisible Di2 install. Those toggle switches look better than anything Shimano might come out with. Do you have any details on them (brand, part #, where to buy)?
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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Carlton Bale] [ In reply to ]
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Carlton, Thanks. Yes, I feel like I got pretty lucky with these switches. In my opinion they make the build. I did a lot of searching and think these are a great choice for this application. They are fully sealed and high quality. Not cheap ($50/ea), but ideal for the application. I bought them at Digikey.com. I did not use the mounting hardware, but simply rolled electrical tape around the threads, reversed the tape halfway so the "sticky" side was exposed and wedged them into the bar ends like bar end plugs. They come with the rubber "seal" rings shown below, but the fit is so good, I just put a little silicone on the bar ends to form a seal. The Switches are rated waterproof/dustproof and I soldered the wires and sealed the connections, so I am not concerned about exposure to the elements.

http://www.digikey.com/...t-detail/en/MTG72AD2





http://www.apem.com/pdf/MT.pdf
Last edited by: Dkblume: Jul 4, 12 5:01
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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Dkblume] [ In reply to ]
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Hello Dkblume,
That is a beautiful assembly ;) I also own this bike and I'd like to make the same.
I have a question :
I would like to know how you do to pass the cable di 2 through the fork?
I know the scott plasma TT (only for Di2) have a hole in the fork to pass the cable but the Premium don't have it...
an other question :
have you removed the cable guide?
Please help me ;)
best regards
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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [hussard29] [ In reply to ]
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Thank you. I'd be happy to try to help you. I ran both the rear brake cable and the shifter wires through the fork. In my build, I used Ultegra shifter modules, which I mounted in the frame near the BB. As such, I ran six wires through the frame and fork. The key here is that you must drill two holes in the fork. One is in the rear of the fork and the other is just below, or even an extension of the existing front hole for the metal post that is used for the stem preload screw. For the hole at the rear of the fork, there is a white sticker/label which is where the hole should be drilled. You'll need to be careful in drilling these out, but the steerer tube is a much thicker steerer tube, so these holes can be made.If you send me your email, I can send you some photos taken by another slowtwitch member showing these hole drillings.

As others on this thread have described, I used a hobby knife to cut slits in the cable guides to run the rear brake cable and to run the Di2 cable to the rear derailleur.
Last edited by: Dkblume: Jul 28, 12 14:17
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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Dkblume] [ In reply to ]
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Thanks a lot for your quickly answer...
I'd like to have some pictures showing this hole drilling.
You can send at hussard29@yahoo.fr
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Hi locutus
Why is it required with the connection box from the sti 6770?
Can't i just solder the wires from the Sm-ew67?
Or is there any components which is needed for the can bus to indicate left and right shifters?
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Hi All!

Here's how I did my setup.
http://rundtramp.blogspot.se/...egra-di2-remote.html
It is inspired by all previous posts, but slight variant.

Have a nice day!
/Richard, from Sweden
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Re: DIY Ultegra Di2 TT [Rikko] [ In reply to ]
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That's a very technical and beautiful build - enjoyed reading your blog.
Don't think I quite have the sodering skills, fortunately a true 'Ultegra TT Di2' is coming out after the show :)

Want to try and convert my Foil to Di2 so I'm soaking in all the tips I can find.

Trying to find that old 60 min / 40k tt split!
http://www.supergosam.blogspot.com
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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Dkblume] [ In reply to ]
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That may be the most "complete" bike I have ever seen on here!

Beautiful.

__________________________

I tweet!

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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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locutus,
thanks for sharing this diy.
i built my bike with cateyes and da brake lever/shifters based off your schematics.
my question is:
have you had any rear der shifting issues?
mine would shift back a few gears after i press the shift button and would sometimes not shift all the way to the largest cog.
i have a compact crank and 11-28 ultegra 6700.
any comments/suggestions?
has anyone else had this happen?
thanks
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Now with the new 9070 DA setup, can we just plug in the sw-r671 into the-ew67?

http://www.tririg.com/articles.php?id=2012_08_Shimano_Ultegra_Di2_TT&mp=all
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Re: DIY Ultegra Di2 TT [timmins02] [ In reply to ]
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What is the latest news regarding Ultegra Di2 TT shifters to come out of interbike? Can we at least use the DA shifters on the newest Ultegra derailers?
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Re: DIY Ultegra Di2 TT [zacarter] [ In reply to ]
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The latest news is linked in the post previous to yours. Ultegra TT bar-end shifters available soon. Next year for brake levers.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Major thanks to loctus and the other contributors in this thread. This is fantastic stuff.

I am going to go ahead and add electronic shifting to my P2.

It would seem that the best approach for hiding the battery and other electronics is in the seat post, under the saddle and bike frame under the seat post.

My plan is to put regular, off the shelve, switches on aero bars and on pursuit bars and wire them all the way back to the seat post inside the frame. Then put the electronics, STI box, in the bike frame under the seat post. Purchase a replacement battery and put it in the seat post. Drill a hole in the seat post and put the battery mount box under the seat so that I can connect here to recharge the battery.

I really need to do this because I don't have any place in my aero bars to conceal electronics. I don't see any reason why this approach would not work but curious if you see any reason why I could not take this approach.

In more detail:

Purchase momentary switch and mount on aero bars and on vision brake levers. Wire inside aero bars and then into P2 frame in the top tube all switch wires (this would be my own wire). This would be longer runs then what you have to the STI box as my electronics will be under the seat post. Splice here into the STI box. Then wire from the STI box up to the battery mount SM-BMR1 which is under the saddle. Then wire from the SM-BMR1 to the battery that is in seat post. Then wire straight down from the saddle to the FD and to the RD.

This would seem to be very clean. First concern is the momentary switches being so far from the STI box. Second concern is I am not exactly sure of the wiring from battery mount, battery and FD and RD so not sure if that is too many wires through the seat post. Alternative would be to not have anything under the saddle but instead have everything in the seat post and bike frame. It would then require me to remove the seat to charge the battery. Which might not be that big of an issue.

Appreciate any input.
Last edited by: bartturner: Sep 29, 12 11:48
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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I don't get it. A lot of 2013 tt bike features Ultegra Di2 derailleurs with both DA Di2 brake levers and shifters. So, does it mean that a cable makes that possible ????

http://www.culturevelo.com/...loha_Ultegra_Di2.jpg
Last edited by: tripot: Oct 6, 12 14:15
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Re: DIY Ultegra Di2 TT [tripot] [ In reply to ]
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tripot wrote:
I don't get it. A lot of 2013 tt bike features Ultegra Di2 derailleurs with both DA Di2 brake levers and shifters. So, does it mean that a cable makes that possible ????


http://www.culturevelo.com/...loha_Ultegra_Di2.jpg


Yah, they call it the eTube system. The new DA Di2 is totally compatible with the Ultegra DI2.


So you could have a Ultegra rear derailleur, Ultegra front derailleur and DA TT shifters/brakes. They all plug into a junction box through their eTube wires.


Later on you could switch out your Ultegra rear derailleur with a DA one and the system would be just fine.

CEO at TrainerRoad
Co-host of the Ask a Cycling Coach Podcast
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Re: DIY Ultegra Di2 TT [Nate Pearson] [ In reply to ]
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Are all the new TT bikes with DA di2 and Ultegra Di2 TT buttons from shimano new versions of the tt buttons or is it the old ones?
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Re: DIY Ultegra Di2 TT [eigner] [ In reply to ]
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Anything that works with integrate Di2 components is the new stuff. Ultegra is only available in the eTube system (someone correct me if I'm wrong).

CEO at TrainerRoad
Co-host of the Ask a Cycling Coach Podcast
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Locutus,
Thanks for this DIY.
I followed your schematics and used DA brake shifters with Cateye remotes on the aerobars.
Is there anything special I need to do with the wiring?
I soldered the Cateye wires directly o the STI and DA wires.
Everything works but the rear der is shifting erratically.
When I shift under load, it would shift then jump back a few cogs.
Is this because I didn't use the extra thick gage wires to connect the cateyes to the other wires?
Thanks
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Re: DIY Ultegra Di2 TT [jamijam2] [ In reply to ]
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Hello, I would try making sure there are no shorts anywhere in the connections. Try re-soldering your joints....use shrink wrap tubing if possible. Let me know if you are still having problems afterwards. Also, post pictures of your final project!!
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Ok thanks!
I will re-solder and post some pics.
What's the best way to do that?
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Hello
I found this great thread while googling for more info on ultegra di2 which I am planning purchase soon. Just need a couple clarifications.
1. What is the type of plugs I need to make my own EW-SD50 wires? I have seen several plugs on market - just need to be sure that I get the correct plugs.
2. How should I solder the wires if I am not using the SM-JC41 junction box? Can I solder all four negatives together and then do the same with all four positives?

Thank you for your help.
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Re: DIY Ultegra Di2 TT [silverblack] [ In reply to ]
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I've seen several Ultegra Di2 bar end shifters for sale recently. They are about the same price as a pair of road brake levers, so there is no need to do the conversion now. Still waiting for Ultegra TT brake levers...
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Carlton, I to am in the process of getting the Ultegra Di2 system put together for my Trek SC and just wanted to confirm with you that with the new Ultegra TT bar end shifters there is no need for getting the electronics out of the STI levers. It sounds like you are saying that the electronics for the canbus are already in these new shifters, could you please confirm that. thank you, Glen
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Re: DIY Ultegra Di2 TT [gralden] [ In reply to ]
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gralden wrote:
Carlton, I to am in the process of getting the Ultegra Di2 system put together for my Trek SC and just wanted to confirm with you that with the new Ultegra TT bar end shifters there is no need for getting the electronics out of the STI levers. It sounds like you are saying that the electronics for the canbus are already in these new shifters, could you please confirm that. thank you, Glen

You are correct. Note, from the other thread, that you will have to use a junction box JC40 (or splice the wires) between the front junction box EW67 and the R671 shifters. EW67 and R671 both terminate into female ends and won't directly plug together.
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Re: DIY Ultegra Di2 TT [Pantelones] [ In reply to ]
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Pantelones wrote:
gralden wrote:
Carlton, I to am in the process of getting the Ultegra Di2 system put together for my Trek SC and just wanted to confirm with you that with the new Ultegra TT bar end shifters there is no need for getting the electronics out of the STI levers. It sounds like you are saying that the electronics for the canbus are already in these new shifters, could you please confirm that. thank you, Glen

You are correct. Note, from the other thread, that you will have to use a junction box JC40 (or splice the wires) between the front junction box EW67 and the R671 shifters. EW67 and R671 both terminate into female ends and won't directly plug together.

Exactly what I was going to say.

I've been holding out for a complete TT kit, but haven't seen one. I'll probably buy a road kit and sell the levers.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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locutus wrote:
the wiring for the internal battery to the external battery mount under the seat:


locutus, can you provide more detail on the seat post modification? It looks like you drilled a hole in the side, installed a Shimano grommet, and routed a wire out to under the seat? Is the battery inside the seat post or under the seat? Any additional details you can provide on how to do this and the battery used would be appreciated.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Hello every body.
First, sorry for my English, I'm French.
I hope someone can help me.

I try to connect Cateye remote on a Ultegra Di2...
I connect my remote to the blackbox. it doesn't work... But I try something else. I connect the black box directly to the remote, without using cat eye wire... It works...

Someone already had this problem? Are cateye's wire bad? any solution?
I can test with an other wire between the blackbox and the remote, but I'm afraid about the sealing of the button...

thanks for your help...

Mal
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Re: DIY Ultegra Di2 TT [mamel] [ In reply to ]
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i had similar issues with the cateye wires. i found them so thin that it key to get enough contact and wire together and solder carefully.

JW (on the comback trail)
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Is it required that the R671 bar-end shifters (or ST-6770 shifters) be routed through the SM-EW67 controller? Or can they be located on different "branches" and coupled together at the bottom bracket? As I understand the system, the EW67 does not intercept/interpret commands from the shifters and pass them to the front derailleur but rather the shift command can be sent directly from the shifters to the main controller in the front derailleur. But I'm not certain of this.

The reason I'm asking is because I would like to relocate the EW67 to under the seat and run as few wires as possible. So I would wire the shift buttons directly to a junction box (SM-JC41) near the bottom bracket area, locate the EW67 under the seat, and run a single cable from the EW67 down the seat post to the same junction box at the bottom bracket. The two "input wires" of the EW67 would not be used in this situation. (This would probably require 2 junction boxes near the BB.)


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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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I thought those following this thread might be interested to know Shimano is now shipping several new Ultegra Di2 compatible parts. They make internal installations a bit cleaner/easier.

Shimano Dura Ace Di2 SM-BTR2 Internal Battery Pack - this is a round battery with an integrated charging control board. It fits inside most round seat posts. Snap rings are included for securing it into compatible hardware.


Shimano SM-EW90-B Junction - This front (A) junction straps under the stem and has 5 ports: 2 for brake-mount shifters and 2 for TT shifters, and a 5th to go to the B Junction. There is also a charging port for the internal battery. It includes ANT+ capability to broadcast gear selection and battery status to a compatible device (only the Shimano FlightDeck computer at this point; hopefully Garmin will add support)


Shimano SM-EW90-A Junction - This is a smaller version of the front (A) junction that has only 3 ports and no ANT+. This would be used with only 1 set of shifters, or with TT shifters daisy-chained into the open port on the brake lever shifters. It also has the charging port.
http://imgur.com/Tg0nEiM

Shimano Dura Ace Di2 SM-BCR2 Charger for SM-BTR2 - this charger has a USB plug on the input side. The output plug connects to a port behind a flap on the front A junction. This only charges the new internal battery, not the older external battery as it doesn't include the charging control circuity.
http://imgur.com/soA25af
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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I would also be interested to know how you extended the battery wire to the top of the seat post...is this a Shimano wire or did you use some other type of wire?
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Carlton Bale wrote:
locutus wrote:
the wiring for the internal battery to the external battery mount under the seat:


locutus, can you provide more detail on the seat post modification? It looks like you drilled a hole in the side, installed a Shimano grommet, and routed a wire out to under the seat? Is the battery inside the seat post or under the seat? Any additional details you can provide on how to do this and the battery used would be appreciated.

I found out that the battery was mounted inside the seatpost in the battery mount adapter was attached to the seat. This was done as opposed to cutting down the battery mount. So there are 2 wires, the standard Shimano wire from the junction to the battery mount, and a second custom wire running back from the mount to the third-party battery in the seatpost.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Any idea where you can buy these?
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Re: DIY Ultegra Di2 TT [ollie3856] [ In reply to ]
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I ordered the battery, charger, and 5-port junction from http://www.bike24.net/ in Germany and they have shipped. Prices were below MSRP. TwoHubs.com has the battery, charger, and 3-port junction in stock; prices weren't as favorable.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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great, thanks for the heads up!
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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I was able to get a partial set of Ultegra Di2 last summer and planned to put it on my road bike (but haven't done so yet). I pretty much have shifters (road), the derailleurs and the battery. My plan was to order the cables, the front junction, the rear junction and the battery mount. Now I am thinking about putting this on my tri bike instead. I know I need the new TT shifters (SW-R671). If I buy the SM-EW90 junction (either one), do I still need the 'road' front junction (SM-EW67-A-E)? Or does this new front TT junction replace the 'road' one?

Also, it seems like the TT shifters all say '11 speed' when I see them for sale online. I have a 10spd rear derailleur (and everything I own is 10spd, so I'm not planning on switching). It appears as if there is a way to switch between 11spd and 10spd via some kind of software adjustment....do I need to buy the 'computer' that Shimano has for sale in order to do this?
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Re: DIY Ultegra Di2 TT [IAMike] [ In reply to ]
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All 3 of the front junctions are interchangable. The 2 new ones are "Dura ace" but work with Ultegra.

Same for the shifters: they work with either. They just send up/down shift commands; the deraileur determines the number of available gears.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Thanks that is helpful. I interpret to mean that you can harvess the little black boxes out of the Ultegra Di2 shifters (6770 STI) and do a Dura Ace 9070 setup. If you wanted to you could then use Dura Ace 7970 shifters with 9070. Not sure why you would want to.

Sure would be nice if Shimano would give us a cheaper solution to get from Momentary switches to CanBus.
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Re: DIY Ultegra Di2 TT [bartturner] [ In reply to ]
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bartturner wrote:
If you wanted to you could then use Dura Ace 7970 shifters with 9070.

The older 4-wire Dura-Ace 7970 is not cross-compabile. Ultegra 7970 and Dura-ace 9070 2-wire (e-wire) are interchangeable.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Realize they are not compatible off the shelve. But as this is a DIY thread if you harvest the little black boxes out of the 6770 STI you can make the 7000 series dura ace shifters work. Not sure if you would want to do that. Personally, for this go around I am using DA 7000 series versus the first time I used Ultegra. BTW, the DA 7000 Di2 is on pretty significant sale as they move to the new generation. I was able to purchase everything for a less than Ultegra.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Carlton Bale wrote:
bartturner wrote:
If you wanted to you could then use Dura Ace 7970 shifters with 9070.


The older 4-wire Dura-Ace 7970 is not cross-compabile. Ultegra 7970 and Dura-ace 9070 2-wire (e-wire) are interchangeable.


I'm about to pull the trigger on a new TT bike. I want Ultegra Di2 TT, but as I understand it, the pursuit shifting isn't available.

So, how challenging would it be to order the Ultegra Di2 setup and install the electronic pursuit shifters once they become available?

@christopher_borden
Spinning Spoke Dimond Bikes Flo Cycling Castelli Cycling
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Re: DIY Ultegra Di2 TT [Borden] [ In reply to ]
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I wonder about using the remote climbing buttons, SW R600, on the base bar.
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Re: DIY Ultegra Di2 TT [Borden] [ In reply to ]
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If you get the 5 hole junction box, I think it's just a matter of plugging in the second set of shifters once they become more readily available. If you get the three holer, I think you'd have to swap out the junction box as well....but I think it will be pretty simple to do either way.
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Re: DIY Ultegra Di2 TT [Borden] [ In reply to ]
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Why not Dura Ace 7970 di2 instead of Ultegra?

IMHO, it looks better, performs as well if not better, more easily use a different battery, shifters, etc. Depending on components the cost is close depending on where you buy from. You can actually do 7970 for less than Ultegra if using only FD, RD, front harness. Only negative to DA is the thickness of the wires and possibly the level of waterproofing.
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Re: DIY Ultegra Di2 TT [Borden] [ In reply to ]
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Borden wrote:
So, how challenging would it be to order the Ultegra Di2 setup and install the electronic pursuit shifters once they become available?

You could either get 2 of the lower junctions to mate cables for the areo shifters, brake shifters, and upper controller... or replace the upper controller with the new 5-port version.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Great thread.

I'm a hobbyist electronics guy and been installing car audio systems since. So basically, the only needed parts are the RD, FD, Mount and Battery, right? Then use hook-up wires and push-button switches. Sounds like a great project!
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Re: DIY Ultegra Di2 TT [koykoy] [ In reply to ]
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koykoy wrote:
Great thread.

I'm a hobbyist electronics guy and been installing car audio systems since. So basically, the only needed parts are the RD, FD, Mount and Battery, right? Then use hook-up wires and push-button switches. Sounds like a great project!

You need a "brain" at each end point of the system. You can not wire push button switches into the system without using donor electronics from a set of shifters or shimano button set. There isn't much of a way to do it homestyle cheap unless you are a electrosavant.
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Re: DIY Ultegra Di2 TT [Pantelones] [ In reply to ]
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Thanks, got it. I noticed after reading the posts here and the other threads. I thought it was as simple as giving some voltage to the derailleurs and they instantly move.

Will search for the 7970. I think they are "simpler" in schematics than the Ultegra di2
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Re: DIY Ultegra Di2 TT [koykoy] [ In reply to ]
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Plus if shop around 7970 can be purchased at a competitive price as Ultegra if not cheaper.

I have done one bike Ultegra around 6 months ago and doing a 7970 bike now.
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Re: DIY Ultegra Di2 TT [bartturner] [ In reply to ]
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First post here, and first dabble with Di2, so please excuse any ignorance on my part.

I bought a complete Ultegra Di2 upgrade groupset, with the intention of hacking the shifters as per the original post and adding additional Cateye switches onto my base bars. I bought the SW-R671 aero switches to piggy-back onto the internals of the hacked-up levers, but then when I looked carefully at a photo of the complete TT groupset, it appeared as though maybe I didn't need to hack up my shifters at all.



I have subsequently ordered a SM-EW90-A as seen in the top right of the photo above as the gender of the cables was wrong for connecting to the SM-EW67A-E which is for the normal shifters. I am still waiting for a couple of connectors, so haven't tested anything yet, but wanted to pick the collective brains here.

I did a quick dis-assemble of my aero levers, which I am planning to piggy-back some extra wires onto for remote switches, but the internals are pretty tiny!


complete unit


with the cover removed


the micro-switches


Haribo for scale

I am assuming that there must be a CANBUS controller in that tiny little unit or is the controller actually in the SM-EW90-A? Has anyone else taken one apart and been faced with tiny surface-mount components, or accidentally destroyed the unit while opening it up?

Cheers, Rich
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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If you just want to add shift switches to your base bars, my guess is that, based on the diagram posted, you only have to splice the wire between the R671 and the front junction box: grey (common), yellow (up), purple (down). As an alternative, you could also get that beautiful TT brake lever with shift switches.

I might go this route as somebody here is selling a TT Di2 upgrade kit for about $1000 which already includes the R-671 aero switches, maybe $900 without the mechanical brake lever included. But since the included front junction box is the 3-port, might as well do the splice and install some switches near the brake lever.
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Re: DIY Ultegra Di2 TT [koykoy] [ In reply to ]
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The cable between the aero switches and the junction box is only 2 wire, so much already have an encoded signal, so cannot be spliced with a momentary action switch, only something else which already has a CANBUS signal.

The junction box is also available in a 5 port version: SM-EW90-B

3 port version: SM-EW90-A

I'm not particularly keen on the Shimano base levers with switches built in, they're rather bulky, not particularly light, 350, and I already have some very nice carbon levers which I want to use.

Just wondering if anyone had already opened up the aero switches to hack.

Cheers, Rich
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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Oh okey, my bad. How about the SW-R600 (or cannibalize this so you can use your cateye basebar switches), though I guess you have to use the 5-port switch and I dont know if the connectors would mate. :-)

[img]http://www.excelsports.com/...imbing%20Shifter.jpg[/img]
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Re: DIY Ultegra Di2 TT [koykoy] [ In reply to ]
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Those bar-top switches are the old 4-wire Dura Ace system which was much easier to hack, not the new CANBUS system, so that wouldn't move me any further forward.

Just wondered what I will face inside my aero switches, as if I can avoid cannibalising my drop-bar shifters so that they can go on another bike intact I would like to do so.


Cheers, Rich
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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Here are some very detailed instructions for soldering remote switches onto the Ultegra Di2 shifter circuit boards:
http://rundtramp.blogspot.se/...egra-di2-remote.html

Given the complexity of the modification, my personal opinion is that you'd be better off mounting a climbing shifter or disassembled TT shifter near the right brake lever.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Ah, that's spot on, just what I was looking for!

Many thanks, Rich
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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Hi,
I just finished to receive all my ultegra di2 components (including the 5 ports junction box).


Unfortunately, when I connect everything, it won't powered up. Is there any battery inside the SM-EW90-B that I need to charge? What would be the charger ref then?


thanks for the help, you all have been very helpful already :)
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Re: DIY Ultegra Di2 TT [playmobil31] [ In reply to ]
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I have the same setup. I connect the bar-end shifters to the 5-port junction, to an internal B junction, and on to the internal SM-BTR2 Battery, front derailleur, and real derailleur. The battery had a low charge, but everything shifted. I fully charged the battery by attaching the i2 SM-BCR2 Charger to the side of the 5-port junction.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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That's my setup right now.



For now, I'm still missing the ST-9071. All I know is all is properly connected but it's not powering up. My first guess would be the issue is coming from the SM-EW90-B but I don't know what and how to confirm...
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Re: DIY Ultegra Di2 TT [playmobil31] [ In reply to ]
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You should be able to charge the battery to test if it works. Also check all of the connections and make sure they are completely snapped.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Carlton Bale wrote:
You should be able to charge the battery to test if it works. Also check all of the connections and make sure they are completely snapped.

The battery? SM-BTR1 ? yes, fully charger and verified with a voltmeter.
Is there a battery in the SM-EW90-B? If so, how can I charge it?

All the connections have been verified and inserted until the "click" sound.

Thanks
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Re: DIY Ultegra Di2 TT [playmobil31] [ In reply to ]
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It sounds like you've verified everything properly. There is no battery in the upper junction. Your best bet would be to ise the PC software and adapter to troubleshoot. Unfortunately, it's pretty expensive. Maybe calling Shimano would help? I'm out of ideas...
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Re: DIY Ultegra Di2 TT [playmobil31] [ In reply to ]
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FYI ST 9071 TT is now available in the aftermarket.
Mine are waiting for me at the post office.
Finally....
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Re: DIY Ultegra Di2 TT [footwerx] [ In reply to ]
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Question to anyone listening....When fishing harness wires through are you doing so with connectors attached or are you cutting them off and re-splicing?

Thanks
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Re: DIY Ultegra Di2 TT [footwerx] [ In reply to ]
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footwerx,

Can you tell us where the TT brakes/shifters are available? The on line shops I visit still show as Mid March arrival.
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Re: DIY Ultegra Di2 TT [martins00] [ In reply to ]
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Japan at least: http://www.alexscycle.com/...ontrol-shifters.html

I'll wait until they are available in EU so I don't have to pay 100 euros extra for customs.
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Re: DIY Ultegra Di2 TT [bonafide505] [ In reply to ]
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bonafide505 wrote:
When fishing harness wires through are you doing so with connectors attached or are you cutting them off and re-splicing?

I did all of mine with the connectors attached. The connectors (and internal wires) are so small that I can't imagine a situation where it would make sense to splice.
  • drill a 15/64-inch (6mm) hole
  • tape the cable to a piece of brake cable and run it through
  • use the SM GM01 6mm round grommet

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Re: DIY Ultegra Di2 TT [VP] [ In reply to ]
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VP wrote:
I'll wait until they are available in EU so I don't have to pay 100 euros extra for customs.

It looks like they are in stock here (Germany): http://r2-bike.com/...ebel-Zeitfahrhebel_1
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Carlton Bale wrote:
VP wrote:
I'll wait until they are available in EU so I don't have to pay 100 euros extra for customs.


It looks like they are in stock here (Germany): http://r2-bike.com/...ebel-Zeitfahrhebel_1

Thanks for the tip, placed the order since they replied to me that they can ship in 1-3 days.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Do the ST-9071 come with E-tube cables to connect to the junction box or do these need to be purchased separately. Thanks!

-Pete

"Most of my heroes don't appear on no stamps"
Blog = http://extrememomentum.com|Photos = http://wheelgoodphotos.com
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Re: DIY Ultegra Di2 TT [allenpg] [ In reply to ]
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allenpg wrote:
Do the ST-9071 come with E-tube cables to connect to the junction box or do these need to be purchased separately.
ST-9071 and SW-9071 have fixed E-tube cables that are 600 mm long.

ST-9071 and SW-9071 shipped from r2-bike.de yesterday. :)
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Re: DIY Ultegra Di2 TT [VP] [ In reply to ]
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BTW, does anyone know of a shop that has the SM-EW90-B in stock?


Thanks!

"Most of my heroes don't appear on no stamps"
Blog = http://extrememomentum.com|Photos = http://wheelgoodphotos.com
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Re: DIY Ultegra Di2 TT [allenpg] [ In reply to ]
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that's the 5 port one right?
mine arrived from http://www.bikecomponents.de 2 weeks back
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Re: DIY Ultegra Di2 TT [footwerx] [ In reply to ]
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footwerx wrote:
that's the 5 port one right?
mine arrived from http://www.bikecomponents.de 2 weeks back

I'm still waiting on mine. Can you tell me does it have the charging port for on board charging?? Will that work for both the internal or external battery??
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Re: DIY Ultegra Di2 TT [martins00] [ In reply to ]
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martins00 wrote:
footwerx wrote:
that's the 5 port one right?
mine arrived from http://www.bikecomponents.de 2 weeks back


I'm still waiting on mine. Can you tell me does it have the charging port for on board charging?? Will that work for both the internal or external battery??

It has the charging port and only works with the built-in battery (which includes the charge monitoring circuitry.)
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Re: DIY Ultegra Di2 TT [playmobil31] [ In reply to ]
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I have just received my junction box (SM-JC40) and top 3 port connector (SM-EW90-A) and wired the whole system up with my SW-R671 bar-end shifters, and nothing happened.

I then substituted the 3 port connector and bar-end shifters with the standard SM-EW67 and normal drop-bar Ultegra STI units, and everything worked fine. Plugging the bar-end shifters into the satellite ports and they worked fine.

No combinations using the 3 port SM-EW90 connector resulted in any action at all.

Any thoughts?

Cheers, Rich
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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Have you updated the firmware?
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Re: DIY Ultegra Di2 TT [VP] [ In reply to ]
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No firmware updates - one assumes I need the USB connector to do so? Is this a common scenario?

Seems strange that one configuration works fine out of the box, swap one connector and it does nothing....

Cheers, Rich
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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I think you may need the 5-port connector. According to the Shimano diagrams, the R-671s do not connect to the ST-9070.

http://dev2.infocaster.net/...20cockpit%20area.pdf
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Re: DIY Ultegra Di2 TT [BluffPlace] [ In reply to ]
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Well, firstly I'm not using the ST-9070 levers, I'm going to hack my own, but at this stage that isn't relevant.

Below is how I plugged everything together and it worked fine, both from the STI units and the aero shifters (hopefully the images are all visible)



When I substituted the SM-EW67A-E for the SM-EW90-A and just the aero shifters, nothing worked at all, not even a battery light on the 3-port junction box



As far as I'm aware I'm using all of the same shifting components as the complete groupset photo below:



Any assistance would be appreciated, and if I can avoid spending 163 on a PC interface or 115 on a 5-port junction when I'll only be using 3 ports that would be great!

Cheers, Rich
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Re: DIY Ultegra Di2 TT [playmobil31] [ In reply to ]
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Have you solved the ew90b problem? My rig is configured identically to yours and has been working successfully with the 3 port junction box (ew90a) Now that I have finally received the brake shifters and replaced the 3 port with the 5 port (ew90b), I can't get it to work. Basically the ew90b doesn't power up?
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Re: DIY Ultegra Di2 TT [pvc] [ In reply to ]
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Same problem here and the local Shimano rep confirmed that a firmware update is necessary.
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Re: DIY Ultegra Di2 TT [VP] [ In reply to ]
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Thanks for the info, looks like I'll have to buy a PC interface then, as I doubt many shops in India have one!

Just another quick query, do I need a spare port to plug the interface into, as that would mean swapping to the 5-port junction, or can individual components be flashed with new firmware in isolation?

Cheers, Rich
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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The Shimano rep said that you can flash the components in isolation. But you must plug the interface into a female port.
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Re: DIY Ultegra Di2 TT [VP] [ In reply to ]
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Same problem here. Finally got the SM-EW90-B and nothing works. Totally bummed. I have the internal battery coming as well as the charger which also doubles as an interface from what I have been told. So I hope that a firmware update is all I need to get the 5 port junction box to work.


Anyone know of North American supply of the brake/shifters? Have not found any in stock on the sites I checked last week.
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Re: DIY Ultegra Di2 TT [martins00] [ In reply to ]
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martins00 wrote:
Same problem here. Finally got the SM-EW90-B and nothing works. Totally bummed. I have the internal battery coming as well as the charger which also doubles as an interface from what I have been told. So I hope that a firmware update is all I need to get the 5 port junction box to work.


Anyone know of North American supply of the brake/shifters? Have not found any in stock on the sites I checked last week.

Sorry to hear the 5-port junction isn't working for you. I'm not sure why it's working fine for me. I have only the SW-R671 bar-end shifters attached and I'm using the internal battery. I hope you get it fixed soon. I ordered the Di2 PC Adapter to update the firmware and switch the upshift/downshift buttons, but it hasn't arrived yet.

I haven't found the brake/shifters anywhere in North America yet.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Carlton Bale wrote:
I have only the SW-R671 bar-end shifters attached and I'm using the internal battery. I hope you get it fixed soon. I ordered the Di2 PC Adapter to update the firmware and switch the upshift/downshift buttons, but it hasn't arrived yet.

I haven't found the brake/shifters anywhere in North America yet.


Why did you do that? The SM-BCR2 charger for the internal battery is a PC interface for updating the firmware and making changes to the components.

Greetings from the IM Germany bike course,
Roland
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Re: DIY Ultegra Di2 TT [RolandG] [ In reply to ]
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RolandG wrote:
Why did you do that? The SM-BCR2 charger for the internal battery is a PC interface for updating the firmware and making changes to the components.

That's hilarious - I had no idea! I wondered how I missed something so obvious, but the box, instructions, and label on the SM-BCR2 all say "battery charger" and make no mention of any additional functionality.

Anyway, I downloaded the Shimano Etube Project software and connected the SM-BCR2. I was then able to update the firmware, switch the upshift and downshift buttons, and enabled multi-shift. The only thing the SM-BCR2 can't do is troubleshooting; the SM-PCE1 is required for that. But I don't think that feature would be needed very often; the problems people here are having are firmware related. FYI, here's the firmware versions that shipped with my setup:

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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Well, to be completely fair to Shimano, they do say it in the User's Manual. See the segments "Features" (top of the right half) and "Downloading application" (bottom of the right half).

http://si.shimano.com/...7FJ0A-000-00-ENG.pdf


Why they don't advertise this feature more strongly, is beyond me. Maybe to push sales of the SM-PCE1?

Greetings from the IM Germany bike course,
Roland
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Re: DIY Ultegra Di2 TT [wzlsimon] [ In reply to ]
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That is very useful to know, especially as it's half the price of the PC interface unit.

Cheers, Rich
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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I just got my SM-EW90-B 5-port junction box from Europe. I upgraded to the latest firmware. I now have a functional Ultegra Di2 TT system with ST-9071 shifters/levers and SW-R671 shifters. I'll post photos when I can. Pretty cool!

-Pete

"Most of my heroes don't appear on no stamps"
Blog = http://extrememomentum.com|Photos = http://wheelgoodphotos.com
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Re: DIY Ultegra Di2 TT [allenpg] [ In reply to ]
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Can I use this SM-BCR2 to charge my old type of battery also?

This type: http://img.artscyclery.com/product/SHUI2BTRY-1.jpg

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Re: DIY Ultegra Di2 TT [superjon] [ In reply to ]
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No, the old type of battery does not have the charging circuits integrated in to it.
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Re: DIY Ultegra Di2 TT [VP] [ In reply to ]
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Updated the firmware and RD-6770 now works with SW-9071, ST-9071 and multi-shift. The FD-6770's braze-on bolt inserts came loose during installation and the derailleur is out to Shimano for warranty.
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Re: DIY Ultegra Di2 TT [VP] [ In reply to ]
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After this firmware update, when the RD-6770 RD is paired with the ST-9071, does the RD shift properly on an 11-speed cassette or on a 10-speed cassette?

Advanced Aero TopTube Bento Speedpacks for Road, Gravel, & Triathlon.. .Direct-mount & ZeroSlip strap-mount, made in the USA.. .DarkSpeedWorks.com. .Reviews. .Instagram. .Facebook
"Why would you want to be the last man alive on a sinking ship?" -- on why Tesla shares its patents.
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Re: DIY Ultegra Di2 TT [DarkSpeedWorks] [ In reply to ]
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10-speed CS-6700 11-23 on a FFWD disc wheel.
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Re: DIY Ultegra Di2 TT [DarkSpeedWorks] [ In reply to ]
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You would need the new Dura-Ace Di2 RD-9070 for 11 speed compatibility.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Does anyone know if the reverse is possible? Can you use 6770 shifters with 9070 RD for 10-speed action? I really don't care to upgrade to 11-speed at this time but really like the looks and weight of the 9070 RD compared to the 6770 RD.
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Re: DIY Ultegra Di2 TT [bonafide505] [ In reply to ]
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I also wonder about this. What parts decide 10speed ore 11speed ? ?
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Re: DIY Ultegra Di2 TT [superjon] [ In reply to ]
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superjon wrote:
What parts decide 10speed ore 11speed ? ?

The rear derailleur only.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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so would 6770 shifters work the 11-speed 9070 derailerus?
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Re: DIY Ultegra Di2 TT [bonafide505] [ In reply to ]
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bonafide505 wrote:
so would 6770 shifters work the 11-speed 9070 derailerus?


EDIT: Yes, both are e-tube and are cross-compatible.
Last edited by: Carlton Bale: May 14, 13 20:13
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Those are both e-tube systems...

I'm racing 2019 IM Arizona as part of Team Smile Train. Will I implode? Will I finish strong? Donate to find out more!
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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9070 is the new DA not 7970.
In Reply To:
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Re: DIY Ultegra Di2 TT [bonafide505] [ In reply to ]
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To answer your question if I remember correctly

If you have a 6770 system (Ultegra Di2) and you install a 9070 RD, (technically Shimano would suggest a 9070 FD as well), 11spd chain, 11spd cassette, and compatible wheels you would have an 11spd system. The shifters, once plugged into the RD (which contains the important stuff) think it's an 11spd system.

I'm racing 2019 IM Arizona as part of Team Smile Train. Will I implode? Will I finish strong? Donate to find out more!
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Re: DIY Ultegra Di2 TT [James Haycraft] [ In reply to ]
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James Haycraft wrote:
To answer your question if I remember correctly

If you have a 6770 system (Ultegra Di2) and you install a 9070 RD, (technically Shimano would suggest a 9070 FD as well), 11spd chain, 11spd cassette, and compatible wheels you would have an 11spd system. The shifters, once plugged into the RD (which contains the important stuff) think it's an 11spd system.

Yes, this is correct.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Carlton, James...Thanks
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Hi Carlton,

Are the recently released sw-r610 11 sp sprint shifters compatible with Ui2 10 speed? I want to add sprint shifters to my setup but cant seem to confirm this info. I'm assuming that once you plug these sprint shifters they would automatically just function as an extension of the rest of the system which is 10 speed, what are your thoughts? I appreciate any advice on this matter:)

"I swim because that's how I get to ride my bike."

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Re: DIY Ultegra Di2 TT [Dopers.Suck] [ In reply to ]
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Everything except the sprint shifters are cross-compatible between Ultegra and the new Dura-Ace Di2. You may need to update the the firmware though...

For whatever reason, the sprint shifters work with Dura-Ace 9070 only. The climbing shifters work with both.
Last edited by: Carlton Bale: May 14, 13 20:15
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Ok, thanks for the update. I'll order them and update the firmware.

"I swim because that's how I get to ride my bike."

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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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I've heard that the sprint shifters fit into a special port on the Dura-Ace STI levers and that port is missing in the Ultegra version.
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Re: DIY Ultegra Di2 TT [VP] [ In reply to ]
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Is there anyway to confirm what you heard? Do you know a shimano rep or someone in the know?

"I swim because that's how I get to ride my bike."

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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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i wondering if the following setups would work -

1) DIY or third-party charger
a) Cable Junction SM-EW67-A-E
b) Internal Battery SM-BTR2
c) Charger with DIY connector to plug into EW-SD50 cable
2) SM-BCR2 Charger
a) Cable Junction SM-EW67-A-E
b) Internal Battery SM-BTR2
c) SM-BCR2 Charger, with DIY adapter to plug into EW-SD50 cable

With setup 1, the cost is reduced by not using 1 x SM-EW90-A junction, 2 x additional EW-SD50 and 1 x SM-BCR2 Charger (substitute with 8.4V, 0.4A charger).
With setup 2, the cost is reduced by not using 1 x SM-EW90-A junction, 2 x additional EW-SD50. The OEM charger is used for firmware updates.

Both setups are based on the assumption that the SM-EW90-A junction does not have any circuitry. Besides cost saving, the advantage of this approach is no hacking to the OEM parts is required.
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Re: DIY Ultegra Di2 TT [Dopers.Suck] [ In reply to ]
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I asked the exact same question of our Shimano tec rep at a recent tour. Wanted to use the sprint shifters for customers with Cervelo P5s with hydraulic brakes. Unfortunately, the new e-tube sprint shifter will only work in the 3rd port of the 9070 STI lever.

But I also pitched the question of the tri bike setup where replacing the brake levers with 9071 is not an option ... still awaiting a response
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Re: DIY Ultegra Di2 TT [freeloader] [ In reply to ]
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Re: DIY Ultegra Di2 TT [di2diy] [ In reply to ]
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Looks interesting, but I'm not sure if the price is low enough to outweigh the "factory-ness" of the Shimano internal battery solution. Regardless, good luck with the new product.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Carlton Bale wrote:
Looks interesting, but I'm not sure if the price is low enough to outweigh the "factory-ness" of the Shimano internal battery solution. Regardless, good luck with the new product.

"factory-ness"... interesting, for DA 9070 I guess you have a point, but for Ultegra it's 1/2 the price, and the "factory-ness" is not visible, but "money-in-the-pocket-ness" is. I also have an option for less if removing the seat post to charge the battery is not an issue
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Re: DIY Ultegra Di2 TT [di2diy] [ In reply to ]
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FWIW I own one of these, which I was v. happy with on my old setup, but it does not appear work at all with the new 5 port junction box (which is why I'm selling mine in the classifieds)
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Re: DIY Ultegra Di2 TT [di2diy] [ In reply to ]
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Great, this confirms that it should work with my intended setups.

The online retailer i am using offers a good price, the main benefit for the ebay offer is higher battery capacity (800mAh over 500mAh). If it really works, i think i can built a external battery pack (like the iPhone battery extender) if required.

Thanks a lot for the feedback :)
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Re: DIY Ultegra Di2 TT [freeloader] [ In reply to ]
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freeloader wrote:
the main benefit for the ebay offer is higher battery capacity (800mAh over 500mAh).

Given how infrequently the Shimano system requires recharging, two times per year max, I don't see this being all that much of an advantage.

The other advantage of the Shimano internal system is that the charger is also the USB adapter that updates the firmware and change settings. That is the most important consideration in my opinion.
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Re: DIY Ultegra Di2 TT [ollie3856] [ In reply to ]
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Are you saying you have one of the eBay conversions that will not work with the 5 port? if so its because the battery module needs to be updated to E tube v2.04, also it can not be updated with the system, it needs to be updated by its self, unplug the FD, RD, and junction control, than do an update of the BTMR1, than it will work just fine
Last edited by: di2diy: May 3, 13 10:39
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Re: DIY Ultegra Di2 TT [di2diy] [ In reply to ]
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Just to be safe I would verify that the ebay conversion does have a fuse or PCB installed. Li-Po batteries can catch fire if they short.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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True, this is an advantage, but only limited update of E tube firmware through the charged, it is not a system checker... you need an SM-PCE1 for diagnostics, BTW it will only work if all the firmware versions are the same for the components, if not you will need the SM-PCE1, to make them match, before you can update with the charger (at least for Ultegra, I don't know about 9070). I also saw an earlier post of yours where you seemed to be saying that you can add sprint shifters to Ultegra levers, this is false, the climber shifter is the only remote shifter you can add to Ultegra at this time, the E tube sprint shifters only work with 9070 levers, or perhaps I misunderstood you post.


This is from the Shimano product info for the charger
  • For use with Alfine Electronic, Dura-Ace 9070 and Ultegra 6770 equipped bicycles with internal batteries
  • SM-BCR2 Internal battery charger is specific to the SM-BTR2 internal battery (BA9070)
  • Includes USB (SM-USB1) power adapter
  • All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
  • Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/

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Re: DIY Ultegra Di2 TT [bartturner] [ In reply to ]
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It is not a Lipo battery, and yes it has a PCB, all the specifications for the battery and charger can be found in the listings, also check the feedback, of buyers... happy, to ecstatic, for both E tube and 7970 buyers.
http://www.ebay.com/...id=p3984.m1555.l2649
http://www.ebay.com/...id=p3984.m1555.l2649
http://www.ebay.com/...id=p3984.m1555.l2649
and for charging in the bike,
http://www.ebay.com/...id=p3984.m1555.l2649


I also do custom harnesses with remote buttons for guys wanting to ride but have limited hand function like paralympic and wounded warrior's. Some of my profit goes to help those who have limited funds for custom set-ups, another words free, just materials cost.
Last edited by: di2diy: May 3, 13 10:34
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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I agree, recharging only once a year instead of 2-3 times is not that big a deal. This is a carryover from previous designs when removing the seat post was required to re charge the battery, remember, I was selling my system for more than a year before Shimano released their seat post battery, and I only recently redesigned the system to allow inline charging.
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Yes the Ultegra levers work with 9070 if updated firmware.
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Re: DIY Ultegra Di2 TT [di2diy] [ In reply to ]
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di2diy wrote:
BTW it will only work if all the firmware versions are the same for the components, if not you will need the SM-PCE1, to make them match, before you can update with the charger (at least for Ultegra, I don't know about 9070).

I was able to update a mix of 1.x and 2.x firmware version components to the latest version. The worst case scenario would be to unplug components and update them individually, or perhaps just select one component at a time when first opening the E-tube software. But at least for me, there were no issues applying updates to get everything to the latest version all at once. I think the caution may be around using E-tube to change the configuration settings (i.e. button functions and multi-shift) if the components have mixed firmware versions. This would definitely cause issues.

Quote:
I also saw an earlier post of yours where you seemed to be saying that you can add sprint shifters to Ultegra levers, this is false, the climber shifter is the only remote shifter you can add to Ultegra at this time, the E tube sprint shifters only work with 9070 levers, or perhaps I misunderstood you post.

You're correct about the Sprint Shifters not working with Ultegra. I was thinking climbing shifter.

di2diy wrote:
I agree, recharging only once a year instead of 2-3 times is not that big a deal. This is a carryover from previous designs when removing the seat post was required to re charge the battery, remember, I was selling my system for more than a year before Shimano released their seat post battery, and I only recently redesigned the system to allow inline charging.

I agree, I think Shimano looked at what the aftermarket innovators were doing with Di2 and copied it.
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Re: DIY Ultegra Di2 TT [ In reply to ]
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i have question about the plan. i am not sure how to make the electric wiring diagram for that for internal battery and internal cable/wiring

i will change gears by
2x sw-r600 (l/r)
2x sw-671 (l/r)

those 4 cables get joined in a sm-ew90b

which get forwarded by a cable to a sm-ew-67-a-e

which get forwarded by a cable to an sm-jc41

from this sm-jc41

one cable goes to sm-btr2
one cable to fd-6770
one cable to rd-6770

and thats it? or were is my flaw in the plan?

thanks!

(yes not brake levers, they are non-shimano)
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Re: DIY Ultegra Di2 TT [bikemessenger88] [ In reply to ]
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bikemessenger88 wrote:
i have question about the plan. i am not sure how to make the electric wiring diagram for that for internal battery and internal cable/wiring

i will change gears by
2x sw-r600 (l/r)
2x sw-671 (l/r)

those 4 cables get joined in a sm-ew90b

which get forwarded by a cable to a sm-ew-67-a-e

which get forwarded by a cable to an sm-jc41

from this sm-jc41

one cable goes to sm-btr2
one cable to fd-6770
one cable to rd-6770

and thats it? or were is my flaw in the plan?

thanks!

(yes not brake levers, they are non-shimano)

The only flaw is that you don't need the sm-ew-67-a-e. You only need 1 "A junction", and that's the sm-ew90b. There is a cable between it and the sm-jc41"B junction".
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Re: DIY Ultegra Di2 TT [bikemessenger88] [ In reply to ]
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bikemessenger88 wrote:
i have question about the plan. i am not sure how to make the electric wiring diagram for that for internal battery and internal cable/wiring

i will change gears by
2x sw-r600 (l/r)
2x sw-671 (l/r)

those 4 cables get joined in a sm-ew90b

which get forwarded by a cable to a sm-ew-67-a-e

which get forwarded by a cable to an sm-jc41

from this sm-jc41

one cable goes to sm-btr2
one cable to fd-6770
one cable to rd-6770

and thats it? or were is my flaw in the plan?

thanks!

(yes not brake levers, they are non-shimano)


Will the R600 work with only the R671 and 5 port junction?
Last edited by: retzel: May 9, 13 18:41
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Re: DIY Ultegra Di2 TT [Carlton Bale] [ In reply to ]
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Carlton Bale wrote:
The only flaw is that you don't need the sm-ew-67-a-e. You only need 1 "A junction", and that's the sm-ew90b. There is a cable between it and the sm-jc41"B junction".

ah!
first of all: thanks for you answer.
if i am right: the sm-e7-a-e shows battery capacity and error and has a button for reset the system. so sm-ew-90b includes the same functionality and additionaly supports 5 instead of just 2 or 3 cable connections?
i read that the sm-ew-90b even may have a ant+ (which i dont really need, but well, it is nice)
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Re: DIY Ultegra Di2 TT [bikemessenger88] [ In reply to ]
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bikemessenger88 wrote:
if i am right: the sm-e7-a-e shows battery capacity and error and has a button for reset the system. so sm-ew-90b includes the same functionality and additionaly supports 5 instead of just 2 or 3 cable connections?

Yes. Also the SM-EW90-B is completely modular while the SM-EW67-A-E has two fixed cables for the STI shifters.

bikemessenger88 wrote:
i read that the sm-ew-90b even may have a ant+ (which i dont really need, but well, it is nice)

That feature and the updated FlightDeck computer were dropped due to technological/schedule problems.
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Re: DIY Ultegra Di2 TT [VP] [ In reply to ]
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VP wrote:


That feature and the updated FlightDeck computer were dropped due to technological/schedule problems.


ah so the ant+ feature is out. but well. i dont need it.

thank you VP for your answer!


there is another important issue: can the sw-r600 be programmed to manage the front derailleur? or only the rear derailleur? if not i am f****d
Last edited by: bikemessenger88: May 8, 13 23:27
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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turboferret wrote:

I did a quick dis-assemble of my aero levers, which I am planning to piggy-back some extra wires onto for remote switches, but the internals are pretty tiny!


complete unit


with the cover removed


the micro-switches


Haribo for scale

I am assuming that there must be a CANBUS controller in that tiny little unit or is the controller actually in the SM-EW90-A? Has anyone else taken one apart and been faced with tiny surface-mount components, or accidentally destroyed the unit while opening it up?

Cheers, Rich

Hi Rich. Did you push through with opening the TT shifter?

Been thinking about setting just like this because of the availability and compatibility issues. Whats available in my country are the R-671 TT shifter and the 3-port top junction box. I intend to add shift switches near the brake.

1. First option would be to open the TT shifter, solder some wires and put parallel switches near the brake for shifting while in the basebars.

2. I also saw some used 7971 brake levers with switches here. I assume that these are simple on/off switches (not sure???). If so, then it will be as simple as to connect this to the wires wired parallel to the switch board.

Possible?
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Re: DIY Ultegra Di2 TT [koykoy] [ In reply to ]
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I've been meaning to update this thread with my progress, so here goes:

Bar-end shifters opened up, internal bits replaced with 2 waterproof micro-switches, which required a fair amount of dremmeling, a bit of soldering, some epoxy resin, then some silicon to finish - end result is that the shifters look absolutely stock and the switches work exactly as they did out of the box




The internal canbus electronic module which did have the micro-switches came apart fairly easily just by sliding a scalpel blade to separate the diaphragm which sealed it all together. Relatively delicate soldering required inside as the switches were tiny










Some insulation tape to hold everything together prior to more silicon to waterproof everything.


One note I should make at this point was I was trying to save as much money as possible during my build, and I wanted everything to be removable if required, so I didn't want any fully soldered joints which would stop complete disassembly of the bike. I also wasn't hugely keen on spending ~$25 on more Shimano proprietary Di2 cables than necessary, so pretty much everything was chopped and I used R/C servo extension cables pretty much everywhere. I kept the Di2 cables for where they plugged into Shimano parts, but most of these were Shimano on one end, servo on the other. The nice thing about the servo extension cables is that they obviously come with both male and female connectors. Most places you will only need 2 of the wires, but for the satellite shifter buttons you need all 3.


One example of a Shimano cable being split (meaning I only needed half the total number) Insulation tape, heat shrink and silicon for the joint.






Again, the junction box is simply a way of joining all the +ves and -ves together, so I made my own - not necessarily particularly pretty, but functional, and hidden inside the frame regardless!






Starting to thread all the cables through






emerging from the BB



with the DIY junction connector




everything wired in






front end with satellite switches just visible on brake levers - I have put one on the outside for index finger use, the other on the inside for thumb, works nicely. These are Cat Eye remote buttons I picked up from eBay, recommended by another twitcher somewhere, should be waterproof and fit for purpose. Everything fitted inside the base bars without problems, although I did open up the holes for the brake cables a bit with the trusty Dremmel to make things easier, hopefully I won't have an expensive dental bill as a result!






Original battery to be replaced by a tiny LiPo seatpost mounted item, as soon as my chargers stop missing in the post from China...this will suffice for the moment, although I only have 1 battery between 2 Di2 bikes, so I need to make sure I fit the battery before heading out to ride!






ready for a test fit






Just needs some bar tape and the saddle lowering a bit, and she's ready to roll!






For those interested, the frame is a Hong-Fu HF-FM086 purchased via VeloBuild which seems pretty good so far, although it's only done a few hundred miles so far.


Oh, and in relation to your 2nd question koykoy, AFAIK all of the Shimano components have a Canbus electronic brain to convert the signals into 2-wire power + signal, unless you are talking about early Dura Ace which used a 4-wire system, which was simpler/cheaper to hack, but not compatible with the later systems. Unless you are going to strip-down a canbus unit and piggy-back on an extra set of switches as I have done, you need an extra brain, and probably a 5-port top junction box too. However, if they are good value, it might be a nice option having the switches already integrated into a brake lever, with no dangling wires and still be relatively cost-effective. I wanted my total system to be light and cheap, and the TRP carbon levers were both of those!


Cheers, Rich
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Re: DIY Ultegra Di2 TT [bikemessenger88] [ In reply to ]
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does that work? (read text in red bubble for more) thanks!
i am still not sure, if 2 x sw-r600 without an st 6770 does work, or if the software manage them only for rear derallieur?!
flickr-link for diagram
http://www.flickr.com/...et-72157633446564589

nobody knows if this will work or not? :-S
Last edited by: bikemessenger88: May 11, 13 0:14
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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For those of you who have dismantled your ultegra 6770 shifters. Do you have any use for them? If anyone wants to sell the aluminum lever part or even the whole shifter minus the electronics please msg me.

I have a snapped left lever i'm having trouble sourcing a repair part for after I crashed it. Would take the left hand or both sides whatever is available.

[url=http://www.flickr.com/...9701@N06/8745513648/][/url]
[url=http://www.flickr.com/...9701@N06/8745513648/]20130516_131528[/url]
In Reply To:
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Re: DIY Ultegra Di2 TT [liquid_speed] [ In reply to ]
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"Wanted to use the sprint shifters for customers with Cervelo P5s with hydraulic brakes. Unfortunately, the new e-tube sprint shifter will only work in the 3rd port of the 9070 STI lever.

But I also pitched the question of the tri bike setup where replacing the brake levers with 9071 is not an option ... still awaiting a response "



Did you ever get an answer to the above?

http://www.endurancesports.ca
Coaching and Training Camps

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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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locutus wrote:
Hello,

Yes, it would work if you spliced into the wires between the black box and x/y (up/down) shift buttons on the levers. I've done this mod before for someone who wanted satellite shifters with the STIs....space is tight in the splice area but can be done with small wires and patience!



Space is EXTREMELY tight. Has anyone found a way to cut into the "black box" itself and attach accessory wires to where the shift buttons actually connect to the PCB?

I'm going to add TT shifters on the mini-TT of my road bike that I recently added DI2, but can't fathom how that little black wire is going to fit back into the casing once I have shrunk-wrap the new wires.

Dkblume wrote:
Carlton, Thanks. Yes, I feel like I got pretty lucky with these switches. In my opinion they make the build. I did a lot of searching and think these are a great choice for this application. They are fully sealed and high quality. Not cheap ($50/ea), but ideal for the application. I bought them at Digikey.com. I did not use the mounting hardware, but simply rolled electrical tape around the threads, reversed the tape halfway so the "sticky" side was exposed and wedged them into the bar ends like bar end plugs. They come with the rubber "seal" rings shown below, but the fit is so good, I just put a little silicone on the bar ends to form a seal. The Switches are rated waterproof/dustproof and I soldered the wires and sealed the connections, so I am not concerned about exposure to the elements.

http://www.digikey.com/...t-detail/en/MTG72AD2





http://www.apem.com/pdf/MT.pdf


With the newest firmwares that allow multi or sequential shifting, do these work as momentary switches? As long as you keep holding up, it keeps shifting, right?
Last edited by: Telemachus: Jun 23, 13 16:02
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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locutus wrote:
You just splice into the three wires from the black box. I modified the diagram to show an example of how it can be done. Let me know if you need help with anything else or want further clarification.

Hi,

I've got two more questions regarding an Ultegra Di2 installation that I could not answer studying this thread:

1. The diagram of locutus shows that the rear junction box can be replaced by soldering all positives to all positives and all negatives to all negatives. Is this also valid for the shifter wires before the front junction box. In specific, can I solder the wires of the SW-R671 shifters to the wires of the ST-9071 shifters and use a 3 port front junction box instead of a 5 port one?

2. Could anyone post the dimensions of a SM-EW90-A junction box? I found the dimensions of the SM-EW90-B which are 47 x 24 x 16 mm and would like to compare the dimensions.

Thanks a lot!

Best regards, Frank
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Re: DIY Ultegra Di2 TT [Telemachus] [ In reply to ]
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my solution is pretty much a copy of what everyone else is done here, except for I am using the STI shifters with mini TT bars.

http://db.tt/vdgxJui6

http://db.tt/CZSuz2CD

http://db.tt/OlIPPNit

http://db.tt/HjZe4DJZ
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Re: DIY Ultegra Di2 TT [bikemessenger88] [ In reply to ]
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bikemessenger88 wrote:
i am still not sure, if 2 x sw-r600 without an st 6770 does work, or if the software manage them only for rear derallieur?!
nobody knows if this will work or not? :-S

Did you ever get an answer as to whether you can use the SW-R600 remote shifter without having to have an ST-6770 Brifter in place?
This is a great option for those of use wanting to shift the rear derailleur from the drop bars when we have integrated brake levers, so can't go with the Shimano levers.
Thanks
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Re: DIY Ultegra Di2 TT [BigBloke] [ In reply to ]
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no i never got an answer. i could never try it out. but now i have 2x left and 2x right triathlon switchers. and you could make one left for front and one left for rear deralieur and you could make the both right derallieur vice versa. from that point of view it may work that 2 x sw-r600 can be programmed different: one for front one for rear, but this is not proofed.
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Re: DIY Ultegra Di2 TT [bikemessenger88] [ In reply to ]
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As I understand it, the sw-r600 climbing shifters work exactly like the sw-r671 triathlon bar-end shifters: no brake shifters required.

I'm not sure if you can have 2 identical sw-R600-L (left) switches installed on the same system but configured differently (one controls front, one rear.) This obviously isn't the intent, but my guess is that it would work. The eTube software would show 2 identical shifters, so you'd need to use trial-and-error to figure out which is which.

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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Dkblume] [ In reply to ]
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Could you send me a photo of those holes as we? lokiddp@gmail.com
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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Rich
Thanks for sharing your enhancements.

In order to add two extra pairs of analog switches (one under the pads, one at the integrated-aerobar brake-lever) my hope had been to simply bring 3 wires out from the innards of the aero lever, and I was hoping that one of those 8 solder joints shown in the right of my picture below was linked directly to the center of the switch, however I checked with a multimeter, and none of them are. Thus the options are to either:

a) Lift out the circuit board, and try to break in from the (presumably sealed) component side to get access to the analog center point of the switches - has anyone tried this? Seems risky and almost impossible if there is a component immediately opposite.
b) Lay down a new track on the circuit board from the centerpoint to the edge, then cover it with an insulator so that the discs don't cause a permanent short-circuit. Maybe using a Circuit writer pen (image below) covered in a good insulator - then it's easy to bring out wires while preserving the current functionality. Has anyone tried this?
c) The option you chose - move the circuit board elsewhere, and add my own analog switches into the Shimano R791 aero shifter.

I think I'll go with c), although b) is simpler. I'll post pictures on this thread. Would you mind sharing with us the model of your Waterproof Micro-Switches, I've struggled to find the same ones online.
Also, since the two switches have a common ground, and since we want to minimize the amount of soldering done at the circuit board, it seems prudent just to attach 3 wires to the board, and then split it further up the cable, rather than your option of having 6 wires going into the circuit board assembly.

Thanks again for sharing your ideas.

Doug




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Re: DIY Ultegra Di2 TT [BigBloke] [ In reply to ]
Quote | Reply
Doug,

I had no idea that the tools existed for adding a new track, so once I realised that there weren't any easy options, new switches seemed to be the only option and relocating the internals somewhere else. 3 wires soldered onto the board and then splitting later may be a more elegant solution, but mine works!

Cheers, Rich
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
Quote | Reply
Oh, also beware of what switches you are using, and their IP rating. My rear gears went crazy then packed up on Sunday at the very wet 70.3 World Champs in Vegas, leaving me with a choice of 42-11 or 53-11 for the 2nd half of the undulating bike course, not exactly ideal! Suspected water ingress at the time, and as the gears worked fine the next morning after sitting in the hotel overnight, pretty sure I was right.

Cheers, Rich
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Re: DIY Ultegra Di2 TT [ In reply to ]
Quote | Reply
Could annonce help me clarify some things in this subject?

Want to upgrade to di2 ultegra and have the brake shifters also, 10 speed. But after reading quite alot of this im confused.

What is bare minimum needed to do this upgrade?
Here is what i came too.
Front and rear deralliur ultegra
Bar end shifters ultegra
Brakes/shifters dura ace (since ultegra version dont excist?)
Cables
Battery box

I can live without the junction box and just solder everthing together/make my own connector box?
Use different much cheaper battery than shimano?
Do i need the battery box if i use another battery?
Do i need junction box to make dura ace and ultegra shifters work together?

Im use to RC planes, so soldering and wires are not an issue.

Regards michael
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Re: DIY Ultegra Di2 TT [Bamze] [ In reply to ]
Quote | Reply
Bamze wrote:
Could annonce help me clarify some things in this subject?

Want to upgrade to di2 ultegra and have the brake shifters also, 10 speed. But after reading quite alot of this im confused.

What is bare minimum needed to do this upgrade?
Here is what i came too.
Front and rear deralliur ultegra
Bar end shifters ultegra
Brakes/shifters dura ace (since ultegra version dont excist?)
Cables
Battery box

I can live without the junction box and just solder everthing together/make my own connector box?
Use different much cheaper battery than shimano?
Do i need the battery box if i use another battery?
Do i need junction box to make dura ace and ultegra shifters work together?

Im use to RC planes, so soldering and wires are not an issue.

Regards michael

You have to have a front junction of some type as this is the central brain lives. The bottom junction can by bypassed if you are keen to cut and solder but that is a lot of work for 35$ savings.
You can use a cheaper/larger battery no issue, be careful with polarity during connections.
Ultegra Di2 shifters exist as St-6770 and St-6870
You need to be careful as the first generation Dura ace Di2 is not compatible in any way with the new dura ace/ultegra e-tube di2 system.
Last edited by: Pantelones: Jan 11, 14 19:22
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Re: DIY Ultegra Di2 TT [Pantelones] [ In reply to ]
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Pantelones wrote:
Bamze wrote:
Could annonce help me clarify some things in this subject?

Want to upgrade to di2 ultegra and have the brake shifters also, 10 speed. But after reading quite alot of this im confused.

What is bare minimum needed to do this upgrade?
Here is what i came too.
Front and rear deralliur ultegra
Bar end shifters ultegra
Brakes/shifters dura ace (since ultegra version dont excist?)
Cables
Battery box

I can live without the junction box and just solder everthing together/make my own connector box?
Use different much cheaper battery than shimano?
Do i need the battery box if i use another battery?
Do i need junction box to make dura ace and ultegra shifters work together?

Im use to RC planes, so soldering and wires are not an issue.

Regards michael

You have to have a front junction of some type as this is the central brain lives. The bottom junction can by bypassed if you are keen to cut and solder but that is a lot of work for 35$ savings.
You can use a cheaper/larger battery but you have to connect it through a battery junction (which means buying one and hacking it apart).
Ultegra Di2 shifters exist as St-6770 and St-6870
You need to be careful as the first generation Dura ace Di2 is not compatible in any way with the new dura ace/ultegra e-tube di2 system.

More like $15 for a JC-41 junction box from Back Country. Def not worth the soldering pains.

as for the OP. If you want internal batteries, it can be connected to the JC-41 via an e-tube wire, simple as that. If you do external, then you need to have a battery mount as the interface btwn battery and JC-41.
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Re: DIY Ultegra Di2 TT [echappist] [ In reply to ]
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For the battery see this on ebay
http://www.ebay.com/...id=p3984.m1555.l2649
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Re: DIY Ultegra Di2 TT [di2diy] [ In reply to ]
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Does anyone know if I could run a Di2 setup without a front derailleur or front shifter in the system (1x10 time trial setup)? I am pondering an aero or die setup and would like to use di2.
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Re: DIY Ultegra Di2 TT [Pantelones] [ In reply to ]
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Yeah sure. Most def if you are running e-tube. You may have to use the special witing harness, which has connection for 4 shifters, if you run 7970.
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Re: DIY Ultegra Di2 TT [Pantelones] [ In reply to ]
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No issue, if e tube u don't even need a brake shifter u can use a climbing remote. If 7970 you can use any momentary switch like cateye buttons.
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Re: DIY Ultegra Di2 TT [sodac] [ In reply to ]
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If you still have the broken shifters, I am interested but only to make light stoker grips for my tandem - you can strip the di2 functions from them if you want
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Re: DIY Ultegra Di2 TT [BigBloke] [ In reply to ]
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Hello,

I am new here - you did great work!

Can anyone tell me, where I can buy the connectors of the Di2 cables? I would link to solder my individual cables. 20 per cable is not that cheap...

Third party connectors are also welcome!


Best wishes,
Frnk
Last edited by: Frnk: Feb 15, 14 13:49
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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Hi Guys,


I need help in setting up 6770 di2 on my TT. Currently I have the complete 6770 road updgrade set. (SM-EW67AE, SM-JC41 and everything in the set)
So I only need the SW R671 L/R TT shifter right? And just plug it away on the EW67 junction?
I plan to sell the STI Shifter and get the 9071 brake lever w/ shifting. will it work too?


Thanks!
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Re: DIY Ultegra Di2 TT [paulbanday] [ In reply to ]
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paulbanday wrote:
Hi Guys,


I need help in setting up 6770 di2 on my TT. Currently I have the complete 6770 road updgrade set. (SM-EW67AE, SM-JC41 and everything in the set)
So I only need the SW R671 L/R TT shifter right? And just plug it away on the EW67 junction?
I plan to sell the STI Shifter and get the 9071 brake lever w/ shifting. will it work too?


Thanks!

you need three more JC-41 splitter boxes in order to do what you want to do

the EW-67 comes with two cables going to the shifters; this is because the STI shifters don't come with cables. The R671 shifters do come with their own cables, so the only way you can interface things is using another JC-41 splitter (this works, btw; i run the same set up)

if you want to run shifters on the bullhorns, you'll need to do additional splitting from the first JC-41 splitter attached to the EW-67. There's an article on TriRig on how you can accomplish this
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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Time to share my Di2 mods, now with TRIPLE changer positions.

My thanks to Turboferret (Rich) for his thoughts, shared in this thread and directly to me.

My Zipp Vuka bars have integrated levers, so I couldn't go with the Shimano lever option, plus I often climb with my hands on the pads, so fancied having access to switches from there too. By pulling the electronics out of the bar-end shifter I can now change the front and rear derailleurs from the aerobars, and can also change the rear from both the drops and, while climbing, from the elbow pads. As others have done, I used the Cateye Waterproof switches, under $15/pair from Performance Bike.

I removed the electronics from the RD changer and brought my own wires out of the circuit board. My plan had been to use a circuit-track pen to reach the centers of the circuit, and then mask those tracks, so as to still use the original switch mechanics, but that was unreliable, so I just took three wires out of the electronics unit before sealing it. Note that I took the common wire to one of the pins on the right, but could have used either of the larger pads adjacent to the switches.

I put the electronics inside the aerobar (as TurboFerret did) and put a couple of waterproof microswitches in the Rear-Changer-Housing. We both found this wasn't very waterproof. His solution may or may not involve a condom, mine involved removing the housing from another pair of Cateye switches, and placing them on a crafted piece of plastic. They function perfectly. I added extra insulating goop, this project needs plenty of that, plus zip-ties, soldering, heat-shrink sleeving, electrical tape, and creativity.

We both tried switches on the brake lever, and both migrated away from that. I prefer the switches better hidden, under the end of the base-bar, which is still very easy to press.

Next project - hiding the original Di2 battery in the downtube via the BB30 bottom bracket.









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Re: DIY Ultegra Di2 TT [BigBloke] [ In reply to ]
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Looks like a very smart job - I wish I'd thought to use the waterproof Cateye switches inside the aero shifters from the start, I might not have had such a miserable performance at the 70.3 World Champs in Vegas..... However, I learned so you didn't have to!

I might swap out my current switches sometime soon.

Interesting to see that you didn't bother with shifters for the front on the base bars - maybe you are better at planning your shifting than I have been in the past!

On the battery front, I've decided that my current battery and mount will get cannibalised and used on my new Di2 Alfine commuting bike, and I'll fit a proper internal seatpost-mounted battery in my Speed Concept.

Cheers, Rich
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Re: DIY Ultegra Di2 TT [turboferret] [ In reply to ]
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turboferret wrote:
Interesting to see that you didn't bother with shifters for the front on the base bars - maybe you are better at planning your shifting than I have been in the past!

I thought about extending the front-changer switches too, but I rarely use them in races, plus despite our best efforts, there is an introduction of risk, which I'd like to minimise.

I received an IM from someone about what soldering iron I used. It was just a $20 Home-Depot-esque thing, nothing special. You can buy finer tips fairly cheaply. I did use a special fine-tipped iron when I was trying to solder wire onto the tracks that I'd laid (in an attempt to reuse the Shimano switch hardware), but as I said, I don't think that approach is worthwhile.
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Re: DIY Ultegra Di2 TT [locutus] [ In reply to ]
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I am really replying to the whole thread, since this seems to be the best thread on custom installations of Di2 on bikes that were not designed to take Di2. I have a Kestrel Talon Tri with Ultegra 6800 11s and like it so much that I would like to use for general riding in addition to triathlons, so I'm sure it 's no surprise to anyone that I want to upgrade to Di2 with minimum of ST-6871 base bar end shifters and SW-R671 aerobar end shifters

Constraints are: I want a clean internal battery installation, but don't want to drill or enlarge holes in frame. I am OK though with the cost of all Shimano stock parts and will save $ by DIY install.

Idea: I have read on this forum that the internal battery size is ~17mm diameter with length 160mm and given that my aerobars are ~19mm ID, my internal battery and JC41 junction will fit inside my aerobars, so that everything could be protected up top in area of stem and aerobars except for 2 wires running down to FD and RD. Those 2 wires could go through the down tube if the wire ends would fit through the mechanical shift cable holes but I don't think they will without modification so I am planning to tape them flush to the leading edge of the down tube. This way, the installation should be easy with no BB removal, I will maintain good aero properties, and the electrics should be well protected from weather. I think that the RD wire would be close to the 1400mm maximum wire length of the Shimano Di2 wires so it may place some constraint on the JC41 location.

I have not seen any mention of this approach on the thread or elsewhere, but I have not read all 1200+ posts to this thread either. Has anyone done this? Any comments or suggestions? Have I got something wrong here?
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Re: DIY Ultegra Di2 TT [Carl1949] [ In reply to ]
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Sorry for bringing this up again, I just have one quick question:

Looking to connect R671 to my bike with Di2 6700, and afaik I don't need a new junction box (replacing EW67-A with a 3-port), I can just connect the bar end shifters to my ST-6700 dual levers, like this?



Last edited by: kornfake: Jun 24, 14 0:03
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Re: DIY Ultegra Di2 TT [kornfake] [ In reply to ]
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And another thing: how long is the cable? I'm worried it won't run the distance from top of my aero bar to the shifters.
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Re: DIY Ultegra Di2 TT [kornfake] [ In reply to ]
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Yes its as simple as that and the cable will be long enough unless your extensions are huge :-)
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Re: DIY Ultegra Di2 TT [ziggys101] [ In reply to ]
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ziggys101 wrote:
Yes its as simple as that and the cable will be long enough unless your extensions are huge :-)
Thanks a bunch!
Last edited by: kornfake: Jun 24, 14 2:55
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Re: DIY Ultegra Di2 TT [kornfake] [ In reply to ]
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Just about done retrofitting my S5.

Having a hell of a time getting the cateye buttons to behave. 2 out of 3 sets don't respond consistently. Going to try cutting the wires closer to the button itself and using something a little more stout, but I may have to resort to something different.
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Re: DIY Ultegra Di2 TT [steve.strong] [ In reply to ]
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Is it possible to install the di2 internal battery in the aerobar extensions?

Thanks
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Re: DIY Ultegra Di2 TT [20speedyx] [ In reply to ]
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Apologies for the bump guys, I've read almost all of this thread and numerous other threads and before I bite the bullet and start ordering in parts I wanted to clarify some stuff.
Plan on getting ultegra di2 for my P5 with maguras. I want to be able to rear shift from the brakes as well as from the extensions.
So am I right in saying for the front end I need

2 R671s for the extensions (obviously)
5 port hub
di2 climbing shifter
cateye switches to help get the climbing shifters down in size
I have read about getting an extra junction in order to extend the reach of the climbing switch from the stem based hub to reach to the brake, is this the case?

Any up to date advice on this would be much appreciated
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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Prospero] [ In reply to ]
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Hi
could you send me the pics too rcyachtie@hotmail.com
Thanks
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Re: DIY Ultegra Di2 TT [Telemachus] [ In reply to ]
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Hi will it work is if I solder the r-671 straight to the ew-67-e junction?
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Re: DIY Ultegra Di2 TT [ziggys101] [ In reply to ]
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Finally found time to solder wires to the PCB of a SW-R600. Could have used better eyesight and steadier hands, but what can you do. Once I figured out how to connect these to the Cateye switches I got off Ebay everything was fine. The red and black wire goes to the middle wire in each of the switches. The blue goes to the combined outer wires from both switches. Smooth shifting and still recognized as a R600 in the E-Tube software. Next up is protection and final wiring.


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Re: DIY Ultegra Di2 TT [acco] [ In reply to ]
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A few layers of PRF 202 plastic spray on the PCB for protection. Waiting for some self vulcanizing tape to cover it. Otherwise just a lot of wire splicing, not so waterproof, I suppose, but should be splash proof. Hopefully good enough. Retested today, works like a charm. Will put switches under base bar brake levers, I think, PCB inside aerobar.


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Re: DIY Ultegra Di2 TT [aidan77] [ In reply to ]
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aidan77 wrote:
Hi will it work is if I solder the r-671 straight to the ew-67-e junction?

you could, but really, there's an easier solution: connect the two pieces using a JC-41. That's what i previous did.
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Re: DIY Ultegra Di2 TT [echappist] [ In reply to ]
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Hi. ok so ive connected the r671 to the ew-67-e using the jc-41 and I have 6770 deraileurs and an external battery but the shifters wont shift the derailleurs, when i connect sti 6770 shifters to the srt up it all works but the r671 dont seem to work, Ive read that people have just plugged and played with the r671 but not for me, if it matters the r671 came from japan via ebay..

any advice? how do I connect to pci unit when using the ew-67-e and the r671??
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Re: DIY Ultegra Di2 TT [aidan77] [ In reply to ]
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aidan77 wrote:
Hi. ok so ive connected the r671 to the ew-67-e using the jc-41 and I have 6770 deraileurs and an external battery but the shifters wont shift the derailleurs, when i connect sti 6770 shifters to the srt up it all works but the r671 dont seem to work, Ive read that people have just plugged and played with the r671 but not for me, if it matters the r671 came from japan via ebay..

any advice? how do I connect to pci unit when using the ew-67-e and the r671??

what your current set up again and what was the previous setup? in particular, how many shifter units in each? how are they connected to a controlling junction (be it EW67 or EW90), and how is it connected to the rear JC-41 (to battery, FD, and RD)?

there could be a firmware compatibility issue btwn all the various pieces

also, by PCI, do you mean PCI-E, the PC interface that sets up the the firmware? if so, i think the interface plugs into an open port/wire; usually people disconnect the wire to the RD and connect that to the PCI-E (don't quote me on it). here may be something informative re: my old set up. also, one doesn't necessarily need the PCI-E if you have the internal battery charger

http://forum.slowtwitch.com/...earch_engine#4928130
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Re: DIY Ultegra Di2 TT [echappist] [ In reply to ]
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Hi, it is my tri bike and i have r671 for shifters (no brake lever shifters, connected to ew-67-e via a jc-41, then I have 6770 FD and RD and external battery connected to the ew-67-e by connecting and solder wires together inside the frame, and seal. everything up to the ew-67-e works fine as ew-67-e lights up green when battery is connected and when I connect the ew-67-e to the 6770 sti shifters on my road bike it all shifts perfect... r671 are new and all other parts are 2nd hand .. My understanding is a firmware problem but Im not familiar with preforming the firmware update and the process
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Re: DIY Ultegra Di2 TT [aidan77] [ In reply to ]
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could very possibly be firmware compatibility issue. if you are in the DC area, i'd be happy to help.
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Re: DIY Ultegra Di2 TT [aidan77] [ In reply to ]
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if you have an internal battery then I believe you need to change your a-junction out for a ew-90 3 or 5 port in order to work. here is an excellent resource for everything di2:

http://carltonbale.com/...ng-you-need-to-know/

edit: just noticed you said you have external battery. probably firmware update issue then
Last edited by: ChrisT: Nov 8, 15 18:18
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Re: DIY Ultegra Di2 TT [ChrisT] [ In reply to ]
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Stuffed everything inside base bar in the end, switches behind brake levers, covered and held in place with ODI rubber grips over the oval base Cateye switch protector. One on each side and used for rear switching only. Regular Shimano TT-switches on aerobars.

Feels solid and works a charm. I really like these, 3-finger brake, 1-finger switching is possible and I can keep 1 finger in front of the switch, if needed.



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Re: DIY Ultegra Di2 TT [acco] [ In reply to ]
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One person on this thread a year or two ago talked about building a micro or Arduino board to do fancier shifting. Does anyone know of any examples of any non-Shimano micros attached to 6870/9070 di2? Or software hacks to the Shimano di2? Or discovery of the di2 hardware protocol? My initial tests show a 1Mhz signal about 0.75 volts, varying amplitude and duration. Not sure yet if it is amplitude modulated, time modulated, or much tighter frequency control than I would initially expect and different frequency per sender.

My plan is to build a pseudo-sequential shift where shifting the front also shifts the rear a programmable number of times. I can do this with just a hack micro and a soldering iron (and a bit more ...), but it would be easier to attach if I had a decode of the protocol.

Or I could just switch to EPS and use shiftAssist ...

Michael Wilson
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Re: DIY Ultegra Di2 TT [carhillclimb] [ In reply to ]
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Hi folks,
Read through all 13 pages and there’s a lot of great info from you guys.
I’m years behind the trend, but I am finally taking my 1x10 (maybe 11) bike to Di2, I was just about to buy an EW90-A to plug a climbing switch into, but I came across a EW-RS910 bar end junction and wondered if this was going to work as an ‘A’ junction?
As I only have the one shifter (SW-R600) to connect to the junction then wire back to the B.B. junction.


You shouldn't let a girlfriend have any say on a bike build for her. If she loves you she'll love the bike. If it's all about the bike, then you're just a supplier. The same is true of engagement rings.
- Retro Grouch -
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Re: DIY Ultegra Di2 TT [alex jb] [ In reply to ]
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alex jb wrote:
Hi folks,
Read through all 13 pages and there’s a lot of great info from you guys.
I’m years behind the trend, but I am finally taking my 1x10 (maybe 11) bike to Di2, I was just about to buy an EW90-A to plug a climbing switch into, but I came across a EW-RS910 bar end junction and wondered if this was going to work as an ‘A’ junction?
As I only have the one shifter (SW-R600) to connect to the junction then wire back to the B.B. junction.

Yes, the 910 works as an Ajunction box, but it only has 2 ports.
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Re: DIY Ultegra Di2 TT [dfroelich] [ In reply to ]
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Great, thanks.

As I am 1x10, 2 ports will be fine. I only have one signal line in and one wire out to the bottom bracket junction


You shouldn't let a girlfriend have any say on a bike build for her. If she loves you she'll love the bike. If it's all about the bike, then you're just a supplier. The same is true of engagement rings.
- Retro Grouch -
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Re: DIY Ultegra Di2 TT [ In reply to ]
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Hi! Iam looking to set up my Cervelo P2 with di2. So far I have a rear derailleur Ultegra 6870. I am looking at the cheapest build possible and have some solder and electronic knowledge. Is there any other way to connect all together than buying the di2 levers and use the "black box"?

I might get hold of this shifters pretty cheap (Di2 Sw-R671) https://www.bike24.com/p235016.html, but as I understand they are just "dumb" shifters also, you can't use this to replace the black box in the levers?

If not is this setup going to work, anything I missing?

Ultegra 6870 rear derailleur
Ultegra 6870 front derailleur
Ultegra 6870 levers right/left
Battery Di2 BT-Dn110
5-port junction box Di2 SM-Ew90-B
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Re: DIY Ultegra Di2 TT [dontpanic] [ In reply to ]
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You can use the SW-R671 extension buttons by themselves. You will need a bunch of long wires if you are not planning to use a Junction B in the bottom bracket area. If it were me, I would use a 3 port A up front and then a Junction B with shorter wires at the back end.
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Re: DIY Ultegra Di2 TT [dontpanic] [ In reply to ]
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plus 1 to what @exviii said. I have almost the same set-up, except on 10-speed 6770 stuff.

btw, you can get away with running just a EW90 3 port.

Personally, i don't think bullhorn shifter for the front is necessary, and I tried running plugging in a climbing switch (RW600); however, that this is really bulky, and I quickly got rid of it
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Re: DIY Ultegra Di2 TT [dontpanic] [ In reply to ]
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If you don't plan on getting a Bluetooth wireless unit (EW-WU111 or EW-WU101) or want to use syncroshift then get a BTR2 battery instead of a DN110 battery. Plenty of used ones out there for half the price of a new DN110.
Last edited by: loxx0050: Jul 25, 18 18:57
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Re: DIY Ultegra Di2 TT [echappist] [ In reply to ]
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Thanks for the info, really helpful! Is there any hack i can use if I want bullhorn shifters when using just DI2 SW-R671?

If not, can you combine DI2 SW-R671 and the black box from a just right shifter and make my own bullhorn-shifters with DIY buttons?
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Re: DIY Ultegra Di2 TT [dontpanic] [ In reply to ]
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Yes, make you're own shifter.

I bought a 'broken' sti shifter off ebay for £10, it was in fine working order, just needed a software update. I then removed the actual switch element from the lever and the junction box from the lever body. As there are two ports on this it works like an in-line switch meaning that you don't need an extra port on your junction box - keep using your 3-port JA.

I filed down the junction to fit in the base bar by the lever with sufficient space to run the brake housing past it, fed the switch through the holed in the base bar then used some Sugru (puttly-like glue) to mount the switch next to the brake. I used some more Sugru and rubber from the brake hoods to make a smoother transition around the switch body and create some more prominent buttons. Finally I used some heat shrink grip over the top to weather-proof/hide it.

It works just fine and is programmed just to shift the rear mech. It requires a firm press of the buttons, in hindsight I could have don't a better job creating the actual buttons. But, it works fine, is pretty sleek and only cost about £15 in total.
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Re: DIY Ultegra Di2 TT [ In reply to ]
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Great, I now have two levers, both right levers from Ultegra 6870, can I reprogram one of them to serve as a "left" shifter. Since I only be using the black-box from lever.

Is there anyone who has made thier own junctionboxes or just solder the wires togheter?
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Re: DIY Ultegra Di2 TT [dontpanic] [ In reply to ]
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not sure about soldering wires etc. but you can definitely programme the buttons whichever way you want, either with Bluetooth & app or PC-link
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Re: DIY Ultegra Di2 TT [dontpanic] [ In reply to ]
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1. What do you mean by "black box?"
Every Di2 shifter has a network interface that identifies itself to the CAN bus network and interprets the button clicks and sends the click signals to the network. If every device has a totally unique identifier, it may be possible to configure two same devices to behave differently. Or, the e-tube project SW and CAN bus controller may only recognize one of each type of device and not allow individual configuration of like devices. The only way to know is to test it and see.

2. I would not try to solder cables into a hacked Junction B. A Junction B is only $20 USD; the hack is not worth it.
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Re: DIY Ultegra Di2 TT [exxxviii] [ In reply to ]
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By the "black box" i mean that I will remove the electronics from the lever, the little box that has the ports and two buttons attached to it by a wire. I happen to have two crashed right lever over, I will try it and see :)
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Re: DIY Ultegra Di2 TT [dontpanic] [ In reply to ]
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What is your high-level objective behind the questions you are asking?

In general, you can use any of the various shift button options individually or with any others. The exception is the SW-R610 sprint shift button which does not contain Di2 electronics and must be connected to a special port on standard brake/shifters. Furthermore, you can individually program the function of each button on a shifter.

What I do not know is whether you can have two of the same components on the Di2 network. For example, you may not be able to have two left SW-R671 button modules in the system. You would have to test it to find out, but my hunch is probably not.

If you wanted to, you could break down SW-R671 and wire it to custom buttons on each bullhorn. Then, you could program those buttons to shift the RD up and down. That would require Synchro mode, but it would work. Similarly, you could break down a pair of SW-R671 buttons and wire them to custom buttons on the bullhorns and program the buttons to shift the FD and RD up and down as you like. Then, you could use a different button type on the extensions, like the new SW-R9160 buttons. Or, you could do the above tear-down with SW-R600 buttons for the bullhorns and then use unmodified SW-R671 buttons for the extensions.
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Re: DIY Ultegra Di2 TT [exxxviii] [ In reply to ]
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My goal is to use some buttons I already built for another bike, I connected these to the right levers sprint shifter ports. Since I do not use my front shifter that often I figure I just place the small box/buttons from the "left" lever (if I can reprogram it) on the handlebar somewhere.

I guess I can try it since I already have two right levers, but i guess it might not work.
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