If you are going the Di2 option then under-mounting with the integrated bars would be a bit tricky as the cable enter through the centre stem cap and it would be a slightly tortuous path for them.
I have to say, I retired my IA2 a few weeks back and love not having to work around the integrated bars, risers and front spacer issues on it anymore.

Do you have any tilt on the extensions? If so, how much?
Which armrests for the Pad XY?

every fit client I've ever had with a Felt ends up having to undermount their bars, or get a new bike. It's no trouble really, cable routing is fine.

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Eric Reid AeroFit | Instagram Portfolio
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"Every"....really, that is quite the statement. I am really surprised. Do you find that your athletes are generally of a certain age/bodytype/flexibility or is this across the spectrum?

body type and flexibility are red herrings. Unless someone is extremely long of leg, and also produces power better without any pelvic tilt, my clients will all end up long and low quite comfortably, in fact more comfortably than with kitchen table or bike shop fit.

The fact is, the Felt IA is a narrow tall bike which is exacerbated by the stem integration on the IA and the OEM stem design on the IAxx bikes. They do make a longer, steeper OEM stem called the Dagger, but it's still not enough most times.

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Interesting to hear, thank you.

It would be worth sending this over to the guys in California as I'm sure Felt would welcome your input...no doubt it will be putting off a lot of prospective customers

the industry turned away from long and low... and sadly I don't think that they're losing many customers. My biggest problem with any bike is not the stack and reach per se but that my clients are *often* on a bike that's one size too small after a bike shop fit. They always run out of reach after they see me.

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Eric Reid AeroFit | Instagram Portfolio
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Nearly all your posts relate to being "long and low" whether it's a fit thread or a new bike design. I'm concerned you either fit one type of athlete or simply put everyone in one type of position. How are all these other fitters managing with fairly standard set ups on a range of bikes but you always find the need for an aggressive stem or undermiunt system. By your words all Felt bike fits go undermount. That's a big statement.

well it's not just the bike, it's also the high stack OEM bars and extensions that comes with the bike that contributes to the problem. An IA with a TriRig system works just fine.

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Undermount is the long/low solution and most often a faster cockpit if above-bar mount isn't 6cm+ over the basebar. Buy the biggest frame, then run extensions under the bars.
-SD

Copy that, thank you. Zipp alumina clips on the Vuka bull have a stack of 37mm so they’re about as low as anything else I can find. I’ve got Zipp evo 110 evo extensions sonim less worried about tilt although it would be nice. Ideal situation is buying just the frame, so the IAxx is my first choice.

Hi Eric,

Sorry to resurrect such and old thread but I'm trying to figure out how to undermount the bars on my 2019 IA10. It's no problem to mount the extensions below the basebar using the OEM clamps but there is no way to get the cups to clear the top of the basebar in that configuration.

If you have a second could you let me know how you're doing this? If you had a picture to share that would be even better!

TIA.

Best way to lower stack height on an IA10 series is to use the Profile Subsonic mount.

Unless your bike has an integrated cockpit?

E

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Sure it can, you just need another 2 sets of those same mounts to put the armpads on. But Eric’s solution is far more elegant and what we advise our customers as well.

Jeroen

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Owner at TRIPRO, The Netherlands

I think we are conflating integrated vs. non integrated solutions... with integrated you need an extra set of the “football nuts”

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For what it’s worth I have a 51cm IA16, with a Devox Bayonet 3 carbon bar. I undermounted the extensions and had originally planned to mount the pads directly on the bar, however I ended up using 1cm pedestal piece and I believe I’m sitting just below 545 stack, to the top of the pads. My goal was 537 but I feel plenty low so I’m leaving it here. Happy to send you pics of it’s helpful, send me a PM.

Any idea for a stem that's lower, clears the head-tube "bump" and fits on a steerer factory-cut for the OEM stem?

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ZONE3 - We Last Longer

Sure, but IA10 in non-integrated :-)


Jeroen

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Owner at TRIPRO, The Netherlands

Thanks for the replies! I like the Subsonic option, that should give me more or less exactly the extra drop I'm looking for.

I've been trying to replicate my fit from my old P4 that I wish I still had and this should get me very close.

Does anyone know if the Felt armrests that stock on the P10 will mount on the Subsonic brackets?

Chad

Felt makes the Dagger, a longer -17 version of what comes on them now.

There are other low profile stems that fit as well, aside from TriRig I’d have to look up which one it was.

E

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You will need new bolts. Felt use M5 bolts and Profile is M6 I think. Best to get the new brackets too

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Ordered both. Thanks for your help!!