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Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth
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I thought I would post my new Cervelo P2 setup for anyone who is trying to do something similar. My recent broken shoulder has given me a little time to play around with my new aerobars. I learned a lot from other posts here on ST. Here's the build, routing, and photos. Feel free to ask questions. Thanks!

-Pete

Zipp Vuka Stealth Aerobar Setup
Shimano Ultegra R671 Di2 bar end shifters
Shimano 9071 Di2 brake levers/shifters
2x Shimano SM-JC41 internal junction boxes (stuffed inside base bar)
2x E-Tube wires to connect the to bar end shifters to internal junction boxes
1x E-Tube wire to connect the to internal junction boxes together

Bike Setup
Shimano Ultegra 6870 front derailleur
Shimano Ultegra 6870 rear derailleur
1x Shimano SM-JC41 internal junction box (stuffed inside seat tube by bottom bracket)
1x E-Tube wire to connect junction box from base bar to seat tube port

Seat Tube/Post Setup
Shimano EWW01 D-Fly
Shimano SM-BTR2 internal battery
Shimano SM-SW90B 5-port external junction box
1x Shimano SM-JC41 internal junction box
1x E-Tube wire from internal junction box to one near bottom bracket
1x E-Tube wire to connect battery to internal junction box
1x E-Tube wire to connect D-Fly to internal junction box
1x E-Tube wire to connect D-Fly to external junction box

Both the front brake cable and Di2 wire are routed through the bottom hole in the base bar.

I was able to route the rear brake housing through the inside of the top tube. I just had to drill out the plastic cable ports by the steerer and seat post. Pushing the cable through took a bit of effort and trial-and-error, but the rear brake feels good.

I had to drill one hole in the seat post for the E-Tube wire. I've mounted the external junction box with zip ties to the seat rails. I really don't need rear hydration this time of year, but zip ties are easy to remove and I can reposition the junction box when needed.

If I really had the spare time, I would draw up a schematic, but tried to provide an accurate overview of the parts needed. I hope this helps!










"Most of my heroes don't appear on no stamps"
Blog = http://extrememomentum.com|Photos = http://wheelgoodphotos.com
Last edited by: allenpg: Nov 9, 17 22:36
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [allenpg] [ In reply to ]
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Very nice and very clean indeed! Be sure to post pics to the "Show Me Your Ride" thread.
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [GreenPlease] [ In reply to ]
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Wow. Doing the same thing. I deff have questions... Great bike!!!!!!
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [allenpg] [ In reply to ]
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Thanks for posting. Thinking of doing similar to my 2012ish P3.
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [allenpg] [ In reply to ]
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Nice!
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [allenpg] [ In reply to ]
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Sorry to wake this old thread but I’m looking to clean up the di2 setup on my Vuka stealth but your picture links don’t work anymore. Could you update this or send me the pics? I’d like to get this fixed up before the end of the year. Thanks!
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [mbecks2] [ In reply to ]
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Thanks for the heads up on the broken image links. I uploaded the files directly to ST, so they are now visible!

"Most of my heroes don't appear on no stamps"
Blog = http://extrememomentum.com|Photos = http://wheelgoodphotos.com
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [allenpg] [ In reply to ]
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How far can you turn the bars to the left? With the rear brake cable so tightly along be stem, I would think it would be restricted.

Alex Arman

Strava
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [allenpg] [ In reply to ]
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This is beautiful! Well done!

Do you have pictures of the junction box in the base bar, or of the installation of the junction box inside the seat tube?
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [nickwhite] [ In reply to ]
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I don't have any photos of the actual build. Running the Di2 cables was actually easier than you might think. The junction boxes weren't that hard to fit into the base bar. You of course have to do it with without the bars mounted to the bike. The biggest challenge on this bike was trying to run the rear brake cable. Got it, but it just took some time. Also, I turn the front completely to the left and right.

"Most of my heroes don't appear on no stamps"
Blog = http://extrememomentum.com|Photos = http://wheelgoodphotos.com
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [allenpg] [ In reply to ]
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Thanks for updating the pictures. I love it all except the external box coming out at the seat. What about this port? Did you consider this at all and decide not to use it? I'm just curious if this would fit in the hole on the bottom bracket and connect everything and still have the option to charge easily. Appreciate your thoughts.


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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [mbecks2] [ In reply to ]
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Are you using an external Di2 battery or internal? The only time I've used the junction box you should is on an older 6770 series road bike with an external battery. The reason I use that 5 port junction box (I already had it) is so that I don't need to remove the seatpost to charge the internal battery.

"Most of my heroes don't appear on no stamps"
Blog = http://extrememomentum.com|Photos = http://wheelgoodphotos.com
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [allenpg] [ In reply to ]
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Yeah I have the internal battery so you're saying I can only use either the 3 port or 5 port external box with that battery?

So could I use a JC41 to connect both left side shifters, another JC41 to connect both right side shifters and then run two wires from there to the bottom bracket to plug into a 3 port external box (since it would fit in there) and all the shifters still work (both base bar and extensions)?
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [mbecks2] [ In reply to ]
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mbecks2 wrote:
Yeah I have the internal battery so you're saying I can only use either the 3 port or 5 port external box with that battery?

So could I use a JC41 to connect both left side shifters, another JC41 to connect both right side shifters and then run two wires from there to the bottom bracket to plug into a 3 port external box (since it would fit in there) and all the shifters still work (both base bar and extensions)?

I love all this creativity but damn, eTap is just so much easier.

Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting

“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [mbecks2] [ In reply to ]
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Basically yes. I have two 4-ports in the base bar to connect everything there. One wire runs down to the bottom bracket where I have another 4 port to connect the FD/RD/Battery wire. The 3-port external connects that wire and the battery.

"Most of my heroes don't appear on no stamps"
Blog = http://extrememomentum.com|Photos = http://wheelgoodphotos.com
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [ericMPro] [ In reply to ]
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ericMPro wrote:
mbecks2 wrote:
Yeah I have the internal battery so you're saying I can only use either the 3 port or 5 port external box with that battery?

So could I use a JC41 to connect both left side shifters, another JC41 to connect both right side shifters and then run two wires from there to the bottom bracket to plug into a 3 port external box (since it would fit in there) and all the shifters still work (both base bar and extensions)?

I love all this creativity but damn, eTap is just so much easier.

Where would you hide the Blip Box on the OP's build?

Alex Arman

Strava
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [doublea334] [ In reply to ]
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doublea334 wrote:
ericMPro wrote:
mbecks2 wrote:
Yeah I have the internal battery so you're saying I can only use either the 3 port or 5 port external box with that battery?

So could I use a JC41 to connect both left side shifters, another JC41 to connect both right side shifters and then run two wires from there to the bottom bracket to plug into a 3 port external box (since it would fit in there) and all the shifters still work (both base bar and extensions)?


I love all this creativity but damn, eTap is just so much easier.


Where would you hide the Blip Box on the OP's build?

behind the BTA hydration

Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting

“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [ericMPro] [ In reply to ]
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Potentially, yeah. But doesn't look like he's using one.

Alex Arman

Strava
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [doublea334] [ In reply to ]
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doublea334 wrote:
Where would you hide the Blip Box on the OP's build?

The blip box can fit inside of the stem! I dont the dimensions of the blipbpx but very sure it'll fit where he has both junction B boxes!

Speed kills unless you have speed skills!!!
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [playero] [ In reply to ]
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playero wrote:
doublea334 wrote:
Where would you hide the Blip Box on the OP's build?


The blip box can fit inside of the stem! I dont the dimensions of the blipbpx but very sure it'll fit where he has both junction B boxes!

Probably not. Those blip boxes are pretty big, bigger in diameter than any stem I've seen.
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [allenpg] [ In reply to ]
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So I've got everything hidden in the base bar and routed through. Now I just need to drill the hole in the seatpost. Could you explain the way you did this without any issues? I have the same seatpost as you just wanted to do it quick and easy, but didn't want to turn it into a disaster. lol
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Re: Cervelo P2 "Clean" Di2 Build w/Zipp Vuka Stealth [mbecks2] [ In reply to ]
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mbecks2 wrote:
So I've got everything hidden in the base bar and routed through. Now I just need to drill the hole in the seatpost. Could you explain the way you did this without any issues? I have the same seatpost as you just wanted to do it quick and easy, but didn't want to turn it into a disaster. lol

Drilling through the seatpost was pretty easy. I picked out a drill bit that was big enough to fit the Di2 wire, then drilled a hole in between the clamp surfaces for the saddle rails. I can't remember the size of bit I used. I also drilled the seatpost, while it was mounted in the bike vs using a vise, etc. By only drilling a hole in the seatpost, I voided the warranty on just it vs the whole frame. Hope that helps!

"Most of my heroes don't appear on no stamps"
Blog = http://extrememomentum.com|Photos = http://wheelgoodphotos.com
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