What crank arm length do your fit numbers require?

My bike came with an FSA Omega crankset and mechanical shifting. It worked fine, but it was pig heavy and flexy. The flexy part could cause some poor shifting under load.

I now have a Red 22 crankset on the bike with Ultegra Di2 shifting. It works great. I love the SRAM carbon cranksets because they are feather light (much lighter than Shimano cranks) and they are very stiff.

Which FSA crankset are you thinking about. The Vision Trimax is very good and not too heavy. I had one of those on my road bike for a while and was very pleased with it. I eventually switched that bike to a SRAM Red 22 when I upgraded it to eTap.

I went to another fitter/coach as well for a second opinion, and he put me at 165mm again. However, I'm still open to experimenting with 155mm cranks. So I guess I'll have to look for sets that are open for accepting these lengths (165mm/155mm). I could find 155mm (24) rotor cranks, but I'm not sure if they'll interface with Shimano/FSA crankset [https://rotorbike.com/.../aldhu24-cranks.html]

I'm considering this FSA crankset: link to crankset. It is lighter than the vision counterpart by some grams and it comes in 165mm size as well, but the compatibility with different crank arm lengths is going to be a big question.

"I went to another fitter/coach as well for a second opinion, and he put me at 165mm again"


What was their rationale for 165mm cranks?


"I could find 155mm (24) rotor cranks, but I'm not sure if they'll interface with Shimano/FSA crankset"

The Aldhu 24 cranks have a Shimano Hollowtech II compatible axle. In fact, I have most of the Rotor cranksets available, including 155mm with or without the INspider power meter.

I would lean way toward the FSA. That thing is gorgeous. Beauty and aero trump weight.

Please let me know if I can answer any questions on the NS Aero crankset for you.