I really appreciate you doing this. Given the challenges with availability, I'm looking at a readily available medium Speedmax CF 8 Disc Di2. I recently had an updated fit session on a size cycle as I change from my primary focus being road racing to triathlon again. I've been out of tri for 10+ years and doing cycling only during that time. I've included both old and new fit numbers. For some reason I can't attach photos or include them in the post. Not sure if they're needed though. I'd appreciate your input on recommended size since the large doesn't seem to go low enough to get me as long as I'd like and the medium would require a 120 stem with pads pushed all the way forward. How would the medium handle in that configuration?
I'm 73" tall with 35" inseam.
Saddle Height: 803
Saddle Setback: 56
Back of Pad Reach: 533
Pad Stack: 650
Back of pad to shifter: 400
I'm gonna ignore the UCI legal fit because - thank goodness, we're not restricted to that! There's a game I like to play that tests my formula for predicting Pad Y and Pad X based on morphology. Before I read your coordinates I plugged your body dimensions into my... we'll, I'll call it my "algorithm" because that's a lofty word that gets tossed around a lot today and, as an English major, I don't get to make such a claim often so, now's my chance! My prediction of your Pad Y is only a few mm off. Love it! My prediction of your Pad X is off by roughly the state of Oklahoma - measured the long way! How is a guy who is 6'1" and LEGGY with a 35" inseam riding a Pad X measured to the rear (to back of the pad right?) of 533?!!! I would have expected 480ish... maybe 500 tops.
Okay, no judgement, if you're happy there I'm good with it.
Canyon Speedmax CF (the new one, the disc brake bike) with a Pad Y of 650 and a Pad X of 533. ....
If you get the Medium the Pad Y of 650 is near the center of the bike's range but the Pad X on the medium (with 80mm stem that comes stock) maxes out at ~493. Canyon makes a 90mm stem and that gets you out to 503ish.
If you got a Large in the same bike it maxes out at 527/658 - so too short still (but closer) and too tall by 8mm.
You've clearly already mathed all this out - I'm just expanding on it for clarity.
I'm okay with a 120mm stem on the medium in terms of handling. Triathlon doesn't require us to have the responsiveness of our crit bikes. The things I'm worried about are a) you wont like is the aesthetic of how a off-brand stem doesn't mesh with the lines of the front end and b) that the steer tube clamp bolts of 90% of the normal stems in the world will come in contact with the bento back that sits immediately behind the stem.
If your Pad X to rear is really 533 the best Canyon Speedmax for you was the previous iteration of the SLX - a very long and low bike. If you want me to detail that prescription let me know, I'd be happy to do it.
Ian Murray http://www.TriathlonTrainingSeries.com
I like the pursuit of mastery
Twitter - @TriCoachIan