I strongly recommend using your old bike as a dedicated trainer bike. You'll save hours of time over the course of a year if you can just leave a bike installed on the trainer.Ideally, I would have also waited a bit more with a fit, because l couldn’t even get a proper ride in before to get acquainted with the bike. But it was just raining the last few days.
The cleats feel much better. He had me do single leg drills and fit them by eye. That made a huge difference. He started with the saddle height, though, as I believe is recommended.
The tricky thing is that I have long limbs: the setup he proposed works well if I am in the non-aero hoods. Based on that position alone, I should get a shorter stem. The current stem length felt perfect in the aero hoods and hoods before the change in seat height. I could rest my arms in a relaxed fashion and the taller SRAM hoods jive perfectly with my hands.
With the lower seat height the interference between elbows and knees in the aero hoods position is substantial, I’d say 2 cm. It’s not arm hairs brushing against leg hairs, but full on contact. And I’m massaging my breakfast with my knees. On the plus side, I could see improvements in my pedaling technique. He put clip-on sensors on my feet and my bum to measure hip rotation and foot rotation.
He told me his plan is to get my position and pedaling technique correct, suggested an osteopath to work on my flexibility and then get me more aero over time. If the position were just a little uncomfortable, I could deal with it for a while and see if I adapt over time or whether the discomfort persists.
The person who gave me the initial bike fit is no slouch either, he is a former world tour pro team mechanic. Yes, he’s not a dedicated bike fitter (he has an official Shimano bike fitter come to his shop regularly), but I reckon he has seen enough people on bikes to know when something is critically wrong. Comfort-wise, his (= owner of bike shop) set up felt perfect: in the aero hoods position it fit like a glove, no interference between legs and arms and I was in a relaxed position. I’m confused. Both know their stuff.
That’d be great, although it’ll take a few days. I have to wait until my XDR driver is here and I can hop on the trainer. Perhaps it would be better to find a compromise between a position that allows me to get aero more comfortably and a position that allows for better pedaling technique.
Not to mention you will save wear and tear on your expensive carbon frame and 12-speed drivetrain. A new AXS chain is like 8000 yen! Don't want to even think about the cost of cassette...