I have RaceFace SIXC carbon cranks, 170mm. Awesome, except that the pedal insert has come loose. (Thread not stripped.) Apparently that cannot be fixed, but any comments on that also welcome.
What I was thinking is whether I can go extreme and shorten the cranks to say 162,5. This would involve cutting etc.. It would need to be done by a very seasoned carbon expert.
I'm sure the right answer is "no", for various reasons, but I thought worth a shot.