Look forward to hearing the feedback of your people. Get pictures and video of your result on the fit bike and post it. If your fitter fights it, run away.

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Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)

I have a bad feeling that your fitter has about 10% of the knowledge that trentnix has about fitting.

Thanks, this is a helpful comment.

I had never heard of Trentnix before this thread but he's helpfully chimed in and I've gotten really great information which I'm going take forward. My conversations with my (new to me) fitter have left me with a good feeling in terms of mutual understanding of my goals, an appreciate of 'where i am' but also a lets get you on a jig and see what develops. I'll let you know how it goes on Tuesday.

I'll have my bike, old fit numbers, the input from this thread, and other professional input I'm soliciting which I would imagine is the best anyone can do. So I'm not really sure what you're suggesting? Shall I book a ticket to Texas from London for a fit? I'm not discounting anything Trentnix has said and implemented every change suggested (with positive results) so I have no reason not to take that foward and to challenge any differeing adivce I might receive down the road as a better informed customer.

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

I would keep posting videos here and listening to what trentnix has to say.

I took a bit of time today to create videos of the following based on comments here (and some others I've had by people i've spoke with)

Run 1: New Stem (120mm, 17 degrees) - https://vimeo.com/462181686

Run 2: Seat up 5mm, forward 10mm - https://vimeo.com/462182931

Run 3: Pads forward 20mm - https://vimeo.com/462183649

Run 4: Pads forward another 20mm (now max forward) - https://vimeo.com/462184146

Run 5: All above plus helmet - https://vimeo.com/462184734

Compilation of all five runs (truncated time): https://vimeo.com/462199632

Things I noticed as I was moving through this, felt 'better' the longer/more forward I got, though my elbows, arms seem to float a bit. Maybe this would be helped by tighter/rounder/molded pads (and/or something a bit longer down my arm). I also outgrow my extensions and something with a bend seems to be more comfortable.

I tried to get video of side and front and lined up timewise (hopefully this is helpful). I'm finding this, plus the conversations I'm having offline with people really informative.

Thank you!! - T

Edit: Added Compilation Video

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Taylor Rogers

2024: IM Hamburg

Pads back 1 cm and saddle forward 1 cm.

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Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)

Room to move the saddle forward, so no issues there.


Regarding the pads, apologies it would appear the previous 20mm notes were wrong should have stated 15mm. So I could move my pads back 15mm (see attached picture).

I'll make those changes and test tomorrow.

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

That’s fine. 15 mm back.

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Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)

Modifcations made, video here:

https://vimeo.com/462323191

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

How does that one feel?

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Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)

Apologies, not sure why my comments didnt go through on that.

Position felt generally similar to the last run. While I can feel a difference in the overall progression (which is for the better), its hard to pick out the individual small changes. I'd say the hands felt like they werent over shooting the extensions (as much) but still didnt quite 'know what to do with them'.

I'm now much more aware that I'm not sure about where my eblows should rest on the pads, but that might have more to do with having wide/flat pads versus a set that cup/lock my arms in better. Maybe with a back so I'm not tempted to shift around so much? It would also seem a set of extensions that allow my hands to sit a bit more naturally (ie bends of some kind) may also reduce the 'fidgeting' and keep me in position?

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

I do think different extensions, as we discussed, would be beneficial.

I think this position is an improvement, but I wouldn't fight additional changes. For example, you could pull the saddle back 15 mm (and drop it 5 mm to compensate) and pull the pads back 15 mm as well and it would probably be pretty decent. I think you could drop the cockpit a bit. I think you could stretch out just a bit more (if your cockpit supported maybe 5-10 mm more armpad reach) and probably be ok. I wouldn't be opposed to stretching out just a bit more (by bringing the saddle back, say, 5 mm or *maybe* 10 mm).

I still think your posture could improve. I would be interested to see if you move around when you ride outside or when you ride hard.

All of that said, I think you're on the target. Getting to the bullseye is going to take some trial and error and some discernment that probably requires a good fitter to make some tweaks in person.

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Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)

Thank you. This has all been very, very helpful and I appreciate the time you've taken to review and offer advice.

Its good to know that I could alter my position a bit more but both in shifting around a bit as well as being a bit more optimized. Though, as you say, might involve a bit more than can be gleamed from static videos. I seem to be (currently) limited to 15mm pad moves (or using an alternate stem to lengthen the entire cockpit) and have about 10mm more drop before totally slammed.

I'm also about 5-6 weeks post rib facture so my body is not 100% and might be some of the (current) posture issues though I know I do move around a bit during races. I can try and set up a video for a training session (I do all my riding indoors) which might mimic an effort a bit more, but getting some video outside/riding is a task here in London but its good to know that would be useful for a fitter moving forward.

In terms of the original question, you noted optimizing with my current setup before offering any input on a frame or cockpit, do you have any thoughts there?

I have my session on Tuesday so I'm looking forward to take this effort forward to that and see what numbers/information/discussion come of that. This thread and the other discussions I've had are giving me a lot to think about and consider.

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

You should be able to measure the armpad stack and armpad reach and use that when bike shopping. You definitely don't want a bike with more stack than what you have now and probably could use a little more reach.

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Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)

Your wrists do look uncomfortable holding on to the aeros. Maybe just rest your hands on top of the shifters.

Yeah, more often than not my hands seem to migrate forward and 'hang' over the ends (see images). Its not the worst from a comfort standpoint but I'm reasonably sure from this conversation (and others) it isn't ideal for position or bike handling.

It doesnt inspire confidence if I need to shift my body and re-orient my hands for control versus my hands/orientation are already in a position to deal with an obstacle or wind.

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

Had my session earlier today and continued to learn a lot. It went well and used the position I ended up with here as a starting point for seeing what worked and what didnt. Ultimately the 'end' position had the seat a few mm lower and the pads a few mm back from current. The pads set a bit wider and something that cupped my arms better. The bars swapped for something with a bend and set at more of an angle. All of which we found it allowed me to get my head a bit lower.

Also we looked at the mechanics of how I ride in the position we played with crank length, insoles and cleat position and and some insoles. Along with modifying various bits here and there I was the most stable and fluid with 165 cranks so I've got something to think about there.

I've got quite a bit to go through and unpack from our conversation so I'll post a better de-brief later but I wanted to again say thank you for everyone's advise and giving me information and things to consider before going into the session. It made my time wildly more productive and allowed Wei to focus on the important bits.

Thanks!

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

What saddle are you on, there?

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Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)

Fizik mistica (my saddle) we didn’t swap for any others.

Why?

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

It's hard to tell because the angle of the picture on the fit bike is different from your last fit video. You look like you are sitting further behind the bottom bracket than before. The position on the fit bike looks closer to your original position from those outdoor photos you posted.

Once again, the angle (and nature of being knee flexed instead of extended) could be playing tricks on my eyes.

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Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)

Ah. I’ll post some more images/video from the session and more info later. Big picture we started with my bike as positioned at last call per suggestions on this thread. Those dimensions we’re then used as the baseline for the bio bike jig and we played with the various positions from there. Taking something till no good and then pulling back and seeing how it all came together.

It’s the session showed I definitely don’t want to up size the bike and I could likely continue to adapt try to push the evolution a bit more as I get more used to riding in the position on the road. Assuming a cockpit can get the length and the angle it’s nothing ‘special’ . The one interesting bit (something that’s just been the status quo for well... ever) is the point that I want shorter cranks 165, down from 172.5. Maybe obvious but I never knew....

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

Following up on this, the session went well, we set up my 'existing' bike on the trainer and took measurements which were then translated to the jig. All of the changes were reviewed with an idea for aerodynmaics and biomechanics starting with review of seat and crank and then looking at the cockpit. We started with crank review (and a few seat position studies and then moved to the cockpit studies.

By and large the final changes are not far off where I am now (or at least accomplishable on my current sized frame). One of the more 'major' findings was that I benefit from reducing my crank length from 172.5 to 165 (in concert with a few other changes). Both in terms of efficiency and comfort on the bike as well as setting my body up for a good run afterwards.

I've continued to discuss all this with Wei who did my fit but as I gain so much from you/this thread I wanted to pass along for thoughts/observations.

Data/Measurements/Images gathered during the session below:

https://drive.google.com/...BDiuroJ7?usp=sharing
https://drive.google.com/...XkD4k-PY?usp=sharing

Assuming I stick with my size frame in the Dimond family do you see that the Vision Metron TFA or Trimax Carbon would allow me to achieve the position I'm looking for? Between the integrated hydration (1.5-2liters) I've designed with the other storage means I've got a BTA and maybe one BTS outisde the frame. and need to stop for a 70.3... and optimized for very little aid station interaction on a 140.6 with my exact nutrition. I realize I may be giving up an aero penalty compared to another bike but when you start to consider the other options I feel like I'll have a bike with more bottles or be more reliant on aid stations (either not the end of the world) and I'd like to stick with what I know and what I'm confident racing (in terms of strategy). Regarding crank length. I'm keen to not loose out on 'easy' decisions though that easy decision is not (necessarily) cheap. What could moving to a 165 crank be worth? Ie... how does it compare to say, finding a 'faster' bike or bike position where one might find 2-3 minutes on the bike. Not looking for exact number, just trying to gauge it.

I was then thinking i'd pair with:
https://shop.visiontechusa.com/...ial-track/metron-tfa

or the non- (fully)integrated version (i could use a stem to get the length as I think the effective stem length on the integrated version is 90mm)
https://shop.visiontechusa.com/...trimax-carbon-si-013

I'm not looking to rush out and buy a load of new gear, but looking to consider where or how I make the best moves. Ie does optimizing my cockpit and crank on my current bike versus buying a new bike with better integration or a 'faster' bike make more sense?

These are the questions I need to struggle a bit with but if you have an opinion I'd love to hear it.

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

Did you try a crank length shorter than 165mm?

Yes, we pushed passed that length and the leg metrics started to go the opposite way so 165 was where we landed.

Why do you ask?

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________________________________________________________
Taylor Rogers

2024: IM Hamburg

Many fitters don't know what they are doing and never go below 165mm because shorter cranks can be more difficult to source.