I'd be interested in this as well.

It does seem like the Sigma X with some differences. For instance there is no cable stop for the front brake cable. I guess the first place to begin is if the size works with your fit. I think fit trumps tidy cables. Since there are only 2 sizes if neither work with your fit then its a non starter. It also seems like more useful if your cables go through the top tube rather than the down tube.

It does seem a bit odd that something like this doesn't have more details available. Even a photo with an example of cabling would help.

The Aeria Ultimate stem is intended to lower the stack of the bar centre so the matched bar can hit the same total stack as an undermount bar, but in overmount. So it's equivalent to a -22deg angle on the 100mm and a -24deg on the 70mm. Which may mean it's not going to be an ideal option from a fit perspective.

It's not designed for mechanical gear cables to run through the stem - they go straight from extensions to frame. Di2 cables route into the side of the stem and out over the steerer. As does the rear brake cable if you have a bar with a hole in the back of the clamp.

There is a cable stop for direct brakes - it's a threaded piece that goes into the cable exit on the base of the stem.

It weighs quite a lot, which is for a good reason that will become clear later.

Cool! Thanks for the details.

You were involved in the design of it, correct ?
If so, congratulations. It's beautiful. I started taking apart a bike to rebuild using this and to use for aero and product testing.
I love it and passed my comments on to Tim.

Thanks, my input to the stem was mostly the fit coordinates. The bar has much more of my input.
Thanks for your feedback, Tim was quite happy :-)

I apologize for my ignorance but the description says its a -17 degree stem - how does that equate to -22/24?

Also any idea if you can fit a SRAM blipbox in them stem (I suspect not!)?

Just to be clear - we're talking about this stem http://www.profile-design.com/...aeria_ultimate_stem/
Rather than this one http://www.profile-design.com/...ct/stems/aeria-stem/

No on the blipbox front. You may need something like this for that.

Haha - very true!!

Yep that's the one. Everywhere I see it advertised it's described as 73 degree?? For example;

http://www.swinnertoncycles.co.uk/...-8-mm-p65569/s158328

Thanks

They're wrong. Not just about the angle. Also mentions a road bar that was cancelled.
As the PD site says - the stem has a 12mm stack from the top of the head tube. Actual angle isn't published so stores must be assuming -17.

Great - thanks for clarifying!

Hi cyclenutnz, you seem to the the man to ask about this. You say that the Aeria Ultimate isn't designed for mechanical gears, could you recommend a good aero stem for us mechanical riders?

I guess a tougher question is, how much is a good aero stem worth in watts compared to a standard stem? I just bought myself the hong-fu HB019 aerobars to upgrade my front end, but I just have a standard stem.

With an overmount bar like the HB019 I'm not keen on pushing mechanical cables through any stem - it's not nice for the cable path. I haven't tested the aero impact but I'm not convinced there is a great deal to be gained by crossing straight from the back of the extensions into the stem vs maintaining a nice cable path to the frame. The fully exposed cables are still hidden behind aerobar hardware and BTA if you have it.

You could do it with the Tririg, but I'm not sure what the availability status of their stems is like at the moment.

Overall the stem is very low on the list of things I'd change in pursuit of aerodynamics. Its primary purpose is fit. The Aeria Ultimate stem was designed to give nice cable routing with that bar and hide the bolts. But most of that won't matter once the key element it was designed for is revealed.

The TriRig Sigma X stem is in stock and shipping. Thanks! http://www.tririg.com/Sigma

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TriRig.com

i've got one. and wrote a bit about it.

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Dan Empfield
aka Slowman

Wow. An unrevealed feature and no speculation from ST on what it is?

My guess is that it will eventually mount a rearward Profile-designed bento box (without bolts on the frame) or a frontward Profile-designed aero bottle without additional hardware. I don't see a computer mount requiring more mass from the stem.

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Madison photographer Timothy Hughes | Instagram

Is there room for a Di2 junction inside it?

My guess is that it's probably this thing shown during eurobike last year. I am budgeting for it already.

Full article at https://bikeboard.at/...heiten-2017-th226265

Wow. That's an interesting system. I'm still a bit torn on nosecone and BTA bottles though. I know they're fast in the tunnel, but I'm not crazy about how it affects steering/handling compared to a frame mounted aero bottle (I use an Elite Chrono CX and love it).

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Madison photographer Timothy Hughes | Instagram

That's awesome!

how does it affect steering/handling?

Weight on the bars are a higher center of gravity as compared to a bottle on the downtube (handling). I'm guessing the additional weight on the bars also affects steering smoothness. The further forward the bottle, the more of an effect.

Personally I only need to run one bottle in a race so I don't have to worry about carrying multiple bottles. I completely understand the need for carrying multiple bottles and the advantage of a bta straw but as I mentioned, my preference is just an aero bottle on the downtube like the TT bikes in world tour races (although some run it on the seat tube).

Thought I think the stem is likely to accommodate that nosecone bottle above, another possibility would be a BTA bottle mount like Bennett's old BMC: http://www.tririg.com/...nett_TM01&num=11

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Madison photographer Timothy Hughes | Instagram

cyclenutnz, I have been looking at the aeria ultimate system more and more. Judging from the pictures on slowtwitch, the aero bars only have one cutout at the center of the bar. So that means it has to be paired with the aeria stem. Otherwise, there's no way for the rear brake cable to exit the aerobar. Is that accurate?

The picture I am refering to is the one below. I don't see any exit hole for brake cables on the rear of the bar.

The holes in the base of the wing for accessing the pad mount bracket are enlarged at the rear to act as a cable exit


Not the greatest quality pic sorry, bars are on a frame hanging on the wall so just pointed the phone up.

Great. That's very clear how the cables would work.

Ideally I want the entire system but not sure if the stem will work well with the Orbea Ordu OMP's spacer.

the guys at Orbea tried it out, I'll ask what the outcome was.

Amazing, Thanks!

The answer I received:
"The stem was too deep in the rear so the cover would not fit unless the rear of the cover was modified"


So it's not a straight plug and play, but not impossible.

Gotcha. If it fits by creating a cutout in the rear, then it's actually pretty good. Even if i create a mess in the bad of the spacer, it won't show.

I think I'll have to wait for this to be in stock at a LBS near me, so I can measure it out.

mine arrived yesterday and will fit over the weekend.

To answer my own question, yes it looks like a Di2 junction should fit ok inside (in the 100mm version anyway) though i'll need to get another for charging without having to take the bars out.

One concern i do have is whether the rear brake cable and 2 x di2 wires will fit through the same cable routing hole at the bar end of the stem. (I'm using a 3T Aura)

there's a larger hole further back on the right side of the stem but I run my back brake on the left hand lever so it's no use :/ Guess I'll just have to give it a go and see..

EDIT: does look like the routing should work fine:



My second concern is the weight. Weighs an absolute ton!

Thanks for this note. I am looking to get this stem but will now have to recalculate based on the angles you provided.

Quick question. Does the future feature to which you referred apply to both stem lengths or only one of the two?

Thanks!

Yes, both lengths.
happy to help with the calculations if you like. Or, if you just change your calcs to XY based (stem Y from base of steerer clamp to centre of bar clamp is 12mm) you'll be on the way.

Hello cyclenutnz, i bought the whole aeria ulimate stem/handlebar combo (70mm) an have some questions:

1. Do I need to install the bridge (holder for bta bottle) in any case for stability reasons? I would like not to install it but I'm not sure because i mounted 6cm of stack spacers under the armpads!

2. What is that item for that is mounted on the underside of your aeria stem?

3. Do you have a suggestion for mounting a blipbox as aero as possibile. Right know mine is mounted on the bta- bridge behind my garmin.

(I woul love to install rather than the bridge a plate that is positioned directly under the arm pads (like the tririg armpads). So I could hide the blip box under the plate. And the higher plate would be in the sliostream of my hands. Then I could also mount garmin higher for better reading)

4. What will you show with the link you posted in one of your posts regarding the blipbox topic?
The link opens a site for carbon luggage!?

Thank you!

With that spacer stack it would be best to install the bridge.


This thread should give you a clue


What I've done for for some aerobars is have aluminium plate cut by waterjet locally (it's cheaper than CNC) in the same style as tririg with the bolt spacing specific to that bar. I'm pretty sure the first set of bolts are at 170mm width.


That was me trying to be funny by saying that the blipbox is so big that it needs a full sized suitcase.
I haven't worked with a blipbox to have any strong suggestions. If you have a bike with top tube mounts I'd be looking at putting the blipbox inside a Bento box - the ATTK IC is set up to make it easier to do this cleanly.

I'm struggling to see from any of the photos if the aeria stem has an integrated cable stop for centre pull breaks like the tririg omega?

It does, there is a stop that threads in to the exit hole on the underside. What I'm not clear on is whether that piece is included with the stem (I've had people ask me what it's for, so I think it does) - will check.

Thanks. Credit to Profile Design for creating this stem, but they really need to publish some diagrams and pictures to show how the cabling works if they expect people to fork out $150 on a stem.

I've been pushing for better instructions in general. Only realised this morning how sparse the instructions for aeria ultimate bar and stem are.
Info about cable routing and setup is going to get much better.

This stem would be lovely on my shiv. I am pretty sure I could make the fit work. With Etap and a the integrated bottle, I would have my dream bike. Any idea when the bottle will be available?

Hello cyclenutnz,

Do you know if the aeria ultimate aerobar and stem has any fit/installation issues with the cervelo p5-6 or is it fully compatible? I want to pull the trigger on it but just want to make sure its fully compatible - magura brakes, beard cover etc?

Thank you in advance.

The 3t Aduro is the only bar that fits with the beard
So your only way of using any other stem is to sacrifice the beard unfortunately

I ordered the stem and confirm that the cable stop does not come with the stem. Seriously?! I mean WTF? What were PD thinking?

Clearly someone didn't think it through. USA has now ordered the stops as individual parts (will be a couple of months before they land) and the stem will come with it in future.

On the plus side. It's so heavy, I can use it as a paper weight or door stop while I wait for PD to finish making it.

If I'd known I was going to have to buy it in installments, I wouldn't have bothered.

Turns out that the parts shipped express and are in the USA already. PM me your address and I'll let the USA team know where to send a cable stop.

Thanks mate. That's very kind of you. PM incoming.

Anyone know if the Aeria bar works with the P5 Magura RT6/RT8 brake levers?

Yes it does. Saw this on Instagram.

https://instagram.com/p/BYXc0cNF_oS/

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Alex Arman

Strava

Excellent! Thanks, Alex.

I got nervous when I was about the pull the trigger on a set of 3T Revo's then saw they are not compatible with the Magura hydraulic levers. I did not want to make that $1,000 mistake with the Aerias.

Ugh, I was so disappointed to find out the Maguras and Revos were not compatible. It was going to make for an ultimate descending bike!

I opted for the Maguras over the Revo, because, ya know, once you go hydro....

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Alex Arman

Strava

@cyclenutnz

Can you tell me if the Aeria Ultimate Bars come with the riser blocks included in the box as I would need to run plenty of them. Also how does the extension tilt work with riser blocks in place? Are there any photos of a Aeria Ultimate with max stack fitted?

Stock bars on my Shiv currently have 65mm of spacers giving me a arm pad stack of 727mm from BB with 15mm of spacers above the stem as I was a 743mm before I managed to drop it. Frame stack is 540mm. Need to be able to obtain current fit as a minimum, ideally with room to move up if I choose to race full distance in the future.

The max aerobar stack (from headtube to top of pads) is 168mm with all pad spacers and 40mm under the stem.
So 708 Pad Y on your Shiv
The down angled stem doesn't work so well for you, would need to combine with a normal -6 stem to get more height.

Yes, all the risers are included in the kit. The tilt works exactly the same regardless of spacers.
From another thread in the forum:

Thanks, sadly I'm still not sure if I'd be able to obtain my fit. Here is my Retul Zin from the original position 15mm taller than the current one. Could you advise?

And here is a photo of the amount of steerer I have to play with.

Neither image nor measurements are showing up...

Have FB messaged you as couldn't post photos from my phone for some reason. Thanks for your help, it's great to have someone who knows their stuff to ask.

Is it easier to email you? Best address?

Sorry to be sceptic, but is the 22° really true? Even PD now publishes 17° for both lengths (https://profile-design.com/collections/stems/products/aeria-ultimate-stem )

The website is wrong.
The stem is designed to give a 12mm stack above the headset (centre of the bar), so the true angle depends on how you want to calculate it. It wasn't designed with an angle in mind as the sizing is XY based.

Sorry, old thread but to confirm my understanding I think this would achieve 10mm lower pad stack (all else being equal) for me on my P3C compared to the older Tririg Sigma XF. I know you get pestered a lot, but have I got that right? Assuming you are familiar with the older Tririg geometry (which I think you are :-) ).

Noted I will also have 10mm extra reach if I go for the 100mm stem, which might be a good thing for me.

Appreciate your help, cheers.

Rich.

compared to



That's for a 73deg HTA
So yes, a 10mm stack reduction (or 9.82 if you wish to be fussy).
The AU stem is a bit heavier

Thanks David, really appreciate it.

Quick question: does the AU stem have a hole on the underside of the stem for routing for a straight-pull brake?

Yes it does, there's an older thread about the AU stem and hydration system, this has some pictures of the front brake routing

Yes, there is a barrel adjuster cable stop that threads into the underside. However, the exit angle is not great (there are pics in the other thread)
If you're wanting it for that purpose you would be better to wait till the next production run is released as the exit angle is sorted and the routing out the top is easier too. Unfortunately that won't be out until the end of the year.

Do you have any experience with the 100mm stem and charging/accessing the di2 junction box?

You have to take the EW90 out to get at the charging port. It's not particularly convenient.

As you mention a second, modified, production run... do you think you can motivate the PD people to come up with something to hide the Blipbox? Not inside the stem of course, but on top and covered with a snap-on or magnet (like Tririg Brake) cover. That could probably be made to align with the hydration to make it clean. I know it´s not easy (give the size of this damned Blipbox), but would be very nice... and might be possible as stem and hydration have a fixed position with AU.

Just an idea ;-)

Hey, I work at a bike shop and recently installed this stem on my SHIV along with the Aeria BTA attachment (yes, I run double straws!) AMA!

Couple general notes to start:
1) Yes, It is crazy heavy (don’t know exactly how many g, but the guys at the shop call it ‘the brick’).
2) The setup Is super clean once the BTA is installed.
3) I haven’t noticed handling to be affected enough to complain. High speed flats, downhill, crosswinds, etc all good. You only feel water swish when out of the saddle climbing.
4) trying to get aero testing to compare CdA with/without BTA attached. Will keep posted on that.

Post a pic?

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Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/

I've just finished installing this on my IA.

Firstly I ran with the supplied BTA bracket without the aeria hydration. Unfortunately you need to run quite a few spacers to get this to work (ended up being 35mm or so when running at max tilt). For this I routed brake cable through the smaller hole because the threaded nut would foul with the headtube.

However now I wanted to get the pads lower (and the hydration arrived) the cable outlet I was using was then right behind the screw holes for the hydration clip so I had to drill another one somewhere in the middle of these 2 which then runs the cable as close to the headtube as possible - albeit with some minor rubbing.

It would be great to have a few predrilled holes for bikes with headtubes which stick out a bit...

On a similar note, the flat section around the threaded brake outlet is a pain on the IA as it fouls with the headtube if you want to run it slammed. I didn't want to run another 3mm of spacers under there so grinded that section back to the stem profile to allow me to run no spacers underneath.

Maybe this could be useful for future generations of this stem

I don't think you're going to see any component manufacturers working to hide the current blip box. The PD answer is to put it in the ATTK IC

The next generation has most of the things you've mentioned. It's just some different drilling and machining as the forgings cost too much to redo.

Sorry, I tried to before. This should work now.

Hi Paul, I was wondering if you used the sculpted Felt headset bearing cap, and if so how far up into the stem does your steerer tube travel? I'm trying to put the Aeria stem on my wifes bike, and not thrilled with the distance between the top of the steerer and top of the stem...

Hi there,
I used the Aeria top cap and ran the rear brake cable through it so that its out of the wind.
For me, once I'd sorted the issues with the bottom of the stem (fouling on the head tube) it all sat really well and fits with the steerer perfectly.

Realise this is an old thread but does anyone happen to know if Profile Design are revising the AU stem? I read somewhere that there were to be future versions of the stem coming with different lengths, stack heights and maybe a lighter version?

Chris.

I happen to know these things
The AU stem is getting revised but just different machining on the existing mould - easier cable routing out the top, better alignment for the threaded front brake cable stop, headset cap U shaped instead of pass through.
We investigated making a flat, lighter stem. It was only going to be slightly lighter so moved on to a different design path that will become apparent in time.
There is going to be a much lighter, less integrated solution for mounting the bottle.

Cool. Thanks for the update cyclenutz. Follow up questions if you don't mind.

My main concerns are weight & aero. I'm unlikely to use the AU bottle or route any cables through the stem.

Do you know if there is a lighter stem that is a descent aero match for the bars? Should I be waiting for something coming from PD or be looking elsewhere?

There won't be a new stem from PD to match the bars, development is taking a different path so we can drop weight.
I'm afraid I don't know how any other stems would fit.

Thanks for these insights.
Any indication when these updated Aeria stems will become available?
Am about to order this stem, however if the new stem will be available soon, I will wait for it.

I think it's a few months away. I don't think any have shipped to Distributors yet.

thanks again; I will wait for it then. Would you possibly have any pictures (that you are allowed to share :-) ) showing the differences?
Another related question, is there any update on the matching aeria drinksystem planned as well? or will that remain unchanged?

Probably far too late in the design process, but was there any consideration to a more forward sitting brake cable outlet? I had to drill a new hole to get it to work on the Felt IA, and I think this could increase the range of bikes this would work straight out of the box on.

btw, very happy with the stem, bar and bottle solution once its all installed!

13.5mm forward, pitched 5deg forward to clear headtube better
Don't know if it will clear the IA, will see if the team can dig up the IA drawing to check on.

The stem on the left was a rough test, production is smoother.
You can see the increase in size compared to the existing cable exit

No changes to the drink system apart from a bit of a modification to the clip.

great insights, thanks again!

The exit angle looks great, unfortunately I think its still too far back (for the 56 IA) - I had to drill mine pretty much half way between the threaded hole and the rear-most bottle clip mounting hole
I assume the flat part remains for the old hole? that required some grinding to get it to clear the nosecone without additional spacers underneath the stem :(

That wasn't the most recent design drawing, just the one I could find quickly that showed what I needed to show.
The clearance at the headset has changed a bit too. I don't think it will change the IA needing a 3mm spacer for clearance.

Happy to hear there will be a lighter version! I've been eyeing the stem+hydration to combine with a USE R1 bar, but the weight has been putting me off. Looking forward to seeing the lighter option. Is that one also coming in the next few months?

Any info on when the updated version might be available? Pretty keen to get this and set it up.

Re-reading this post it just hit me that there will be a lighter bottle mount... not a lighter stem, correct? So my private little hunt for a low-rise stem with integrated cable routing (and ideally cablestop for center-pull brake) is still on!!?!

I'm afraid there won't be a solution for your particular requirement in the foreseeable future from PD.

In the process of getting production samples made for testing. Which probably means mid next year for retail availability (I'm never that clear on that end of things)

Will these have the same stem length (100 mm) and stack height (12.5 mm) as the current heavy model? If so, I may get the current stem for now and then switch over. Otherwise I might just wait so I don't have to re-fit.

Anyone tried this and the hydration/fairing with a TRP T920 front brake? It looks like it should work out fine but I don’t want to get a combo that doesn’t go together

More length options. A bit more stack.

haven't tried it with that brake specifically
Posted a bit of info about different calipers here https://forum.slowtwitch.com/...ost=6532151#p6532151
Basically - if you're on a medium or larger frame with the 100mm stem it's unlikely there will be a problem.
The TRP is pretty small compared to something like the Magura so you'd have a fair chance of fitting it on a smaller frame (until you hit the headtube length limit)

Thanks for that link. Here's the current setup - the Aeria stem will end up about 10mm lower at the bar end, and has about 15mm more length. (The current brake is a normal side-pull Ultegra; I'm trying to decide whether to use the TriRig Omega which seems ridiculously expensive if I'm going to put it behind a fairing, or take a much cheaper second-hand T920 and use that.

Happy to hear about the former. Hope stack isn't increased much. The lower, the better for keeping the top of the bottle out of the wind.

Can you tell me what has changed for the v2? Thank you.

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2019 T-Rex Tri Series

Any idea if there will be a 120mm length stem as part of the v2 line?

There is a solution coming that will allow a 120mm stem, though not the same style as the AU

Just different hole drillings, particularly the underside brake cable exit being better aligned and the rear exit being enlarged

Thank you.

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2019 T-Rex Tri Series

Would there be any reason why this wouldn’t fit a specialized shiv steerer tube? I tried to put the stem on this afternoon and with the shim removed it was still too small to fit on my steerer tube. Has anyone else had this problem?

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2019 T-Rex Tri Series

It is definitely being used on Shivs. Can you loosen the bolts? Failing that - a pic would help

Just bought one for my Shiv TT as it was half the price of the TriRig or Pro Missile Evo...anyway, it didn’t come with the 1 inch steer shim. Any idea how to obtain one? Thanks!

I will try and get a picture tonight. I took the bolts out completely. Still not luck. I have a Zipp stem on it now and it is so easy to put on makes me feel like I will break something forcing the Aeria on.

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2019 T-Rex Tri Series

If I get mine on my shiv tri you can have my shim. But for some reason I might not be able to install as it seems not to fit. If I do not end up getting this thing on I’m going to return it.

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2019 T-Rex Tri Series

Most shops should have some floating around. Or ask the PD distributor. USA team are pretty good at sorting that type of thing out.

I have had three different brand stems on this all go on smooth no issues. this goes down about 3-4mm and is shaving the steerer tube and will just stop. I removed the shim and the screws are backed all the way out.

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2019 T-Rex Tri Series

Did you try removing the expander plug. Sometimes that extra pressure outward causes some steerers to be more difficult to put a stem on.

With it removed it may be easier. Worth a try.

Josh beat me to what I was going to say, but I'll reiterate anyway ;-)
The expander can flare out the steerer tube, making it difficult to fit tight tolerance stems.
Loosen that off then try again (don't forget to tighten the expander afterwards).

I will try. These specialized ones are ridiculously hard to remove.

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2019 T-Rex Tri Series

Thanks!

That worked. Was still tight but was able to get it on.

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2019 T-Rex Tri Series

cyclenutnz, the 100mm version of the stem says it can fit a DI2. I assume doing so renders all buttons (and charging port) inaccessible. Is that correct?

That is correct. I've suggested that it not be described as Di2 compatible given that an EW90 fits but it's not accessible. There is a different Di2 solution on the way.

cyclenutz - thanks for all the amazing information in this thread.

Do you have any sense of when PD might be releasing the 120mm Aeria Ultimate?

Just to be clear - it's not an Aeria Ultimate stem that's coming. It's a stem with more length options that can fit the HSF Aeria bottle. It loses other features along with a lot of weight.
I have a production sample now so I think that means September-ish for the USA, a little later for the rest of the world. I'm never very clear on what happens in the distribution channels so don't quote me.

Thale lack of access is a little frustrating, have to admit I purchased it partly to enable me to hide the junction box away - have been wondering how to go about it. Guess not! Fits great, looks great. The HSF looks good but maybe a little big (Argon 18 E-117 small frame - I’m not the tallest!). Will have to do some thinking. Possibly use the bar end junction box and some imaginative routing, or wireless unit, and take the hit on stripping the stem down to charge the battery. Does anyone have any other suggestions? Thanks!

If you have a bento box behind the stem you can but the junction box in there.

I used a 4-pot b-junction hidden in the stem then connected that to the 3-port a-junction in the bento box behind the stem. Wired up like this:

• L-extension, L-brake and R-brake connected to 4-port b-junc. hidden in stem
• R-extension with inline ANT+/B'tooth unit connected to 3-port a-junc. through the stem and into bento box
• 4-port connect to a-junc. in Bento box with short cable.
• remaining port on the a-junc. connected to rest of the system

I have 3 wires peaking out of the top-cap and into the bento box which makes the junction box very accessible

But an Aeria Ultimate Stem V2 is still coming?

They already have a v2 with a larger opening in the rear of the stem. I guess if a new one came out it would be a v3. I purchased knowing I wouldn't have access to the a junction box if put inside the stem. But I have the old peasant style external battery di2.

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2019 T-Rex Tri Series

It's up on the page and both sizes look to be in stock.

Will this new stem offer different stack options to the aeria stem? I am not of the long and low fit category and the only way to fit the aeria system on my bike currently is with all the arm pad spacers and most of the stem spacers.

I guess my trouble is finding out if a shop is selling V1 or V2 - its almost never mentioned. Does anyone know the Item Code, would PRD375593 be the old or the new version of the 70mm stem?

https://sportfactoryproshop.com/...ia-ultimate-stem-v2/

think you can get 15% off with first order.

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2019 T-Rex Tri Series

You can tell by pictures. The rear cable exit is far bigger on V2

Sounds good, thanks! I was wondering about mounting it under the stem behind the HSF mount, the argon’s brake is at the rear of the fork so there’s space there and the hole for the centre pull is redundant. Would be out of sight when the bottle was attached, just depends whether I den get enough wires through the gap! Possibly be a project for later in the year now.

Yes and no. The stack is different ~15mm higher. But it doesn't match aesthetically with the AU bar - it fits of course, but has gaps to the gussets in the basebar

Do you have any ideas about available lengths and internal cable routing capabilities of the upcoming stem?

No internal routing - it's a normal stem. Goes up to 120mm
Intended as a solution for the bottle, not the AU bars.

Has anyone done wind tunnel testing with the stem and bottle? I see some pros running it and it looks far more aero than a round headtube, but I haven't seen any numbers yet.

Do you have any details on the Di2 solution and when it might become available? I am still searching for a good way to hide the junction box and still make it accessible with a stem. Thanks!

Sorry - maybe it’s only not clear to me...

That new stem that you talk about, will I be able to use it to mount the Aeria Ultimate drinking system? Is that what you refer to as HSF Aeria „bottle“?
Not interested in the bar, just wanna get a good hydration solution on my Speedmax CF...

It's not a a new stem - it's a faceplate for the standard -17deg stem
Pics from Eurobike stand



Obviously it's not as pretty from the side as the AU stem, but it looks the same from the front, saves ~250g and costs less. Also not as low stack as the AU stem.

Got it...

Well the standard Aeria stem is about 90 euro vs the Aeria Ultimate stem which is about 110-120 euro.

Assuming the faceplate is not for free, it’s not really cheaper, but lighter at the cost of prettiness ;)

It's for the 1/Seventeen stem, which is 50 Euros
The faceplate adds a bit of cost, but it's still about half the price of the AU
Also gives more length options

Hi,

The stem that came with my Ribble is shockingly sh*t, but fully integrates with the food storage, bars and hydration system and looks neat.

Any ideas how the Aeria Ultimate system would look and if would look as integrated as what I have?

I can take as many pics and measurements as you like.

Cheers,

Pat.

It's the same as this one from Joe Skippers Ribble:

The AU stem would not integrate as neatly as that - you would have to stack it up a bit to match the top of the bento.
You could cut the shroud on the bottle in a similar way
The HSF Aeria bottle sticks a lot further forward.
I'm not sure there would be a meaningful gain for you, but then I don't know how bad the current stem is...

...just wondering: any news when the faceplate will be available? Thanks!

As a guess, probably March in the USA. Later elsewhere.
The people I'd normally ask are busy with a bike show this week.

Sorry to drag up an old thread. Has the different Di2 solution been released? If not, can you give any more details on when and what the solution might be?

Yes, it is the aeroport

Looks like this installed
https://forum.slowtwitch.com/forum/?post=7046468#p7046468

Looking to confirm the current stem specs for the Aeria Ultimate v2 stem.

Is the 70mm still -24degrees and the 100mm still -22?

Not sure the local distributor will know this important fit detail.

Thanks

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nz
rst, then slowtwitch lurker since '93

What's important is the 12mm stack. That's far easier to use for stack calculations.

The mold didn't change between the two versions, just the machining on the ports.

Local distributor will ask me as I'm one of their dealers

The dimensions are unchanged for V2 - it's just different machining of the same forging blank.
The best way to approach it is to look at the XY impact - 70 or 100 in X, 12mm in Y
Yes differences in HTA modify those numbers slightly, but it's still more accurate than using traditional stem calcs

I've back calculated into my system, which gives
AU100 112.8mm x -29.7deg
AU70 86.3mm x -35.2deg

Those numbers won't give a perfect result in the calcs you'll find on ST main site, but only a zero deg stem does so that's not out of the ordinary

Awesome and thanks muchly.

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nz
rst, then slowtwitch lurker since '93

Any word on when the new Aeria stem will be released?

The new stem has passed testing but with the way lead times have blown out I would be surprised if it is available in 2022.
Not that I really keep on top of what happens after the design phase.
I do know a number of other new items will have all production going to OE so aftermarket available will be quite a long time later

Question. Are there other basebars besides the current Aeria Ultimate and the original Tririg Alpha that would allow me to run internal cabling with this stem? I really like it in combination with the Aeria bottle.

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Next races on the schedule: none at the moment

The Wing20C basebar has the exit into the stem, but that's for clipons, not integrated brackets
There is another bar in the works but it falls under the supply issues category as well

Hi Cyclenutnz, Your insights into PD Aeria Ultimate stems are really helpful. I was thinking of a PD Aeria Ultimate, but I think you are saying your newer 2021 design is an improvement. Do you have any recent idea when it might be coming out? I don't want to buy the existing one and find the new one has been released. (I realise you are in design and don't necessarily see the release dates).

From what you are saying the newer design has better entry for the Di2, and cable management. Thanks, Phil

This is the Tri Stem - it's 255g for a 105mm compared to the AU 100mm at 437g
It won't be shipping until March 2023, so you're looking at somewhere between April and July for retail availability depending on where you are.

Di2 has become easier itself, I wouldn't say this stem was any better than the AU from that perspective, but the exit hole is a little larger which is nice.
The aim for the tri stem was to drop weight (big tick) and reduce the price which was looking good until aluminium doubled in price and other production costs blew up too. Also most people don't need the low position the AU stem offers, so the dimensions on this are about the same as a normal -17deg stem.

Brill, thanks @cyclenutnz That is really helpful. I shall keep my money until that gets released next year.