In Reply To:
I can get a good crank upgrade for free but would be changing from a 172.5 length to 175's. Would that be a big deal? I am 5'10" with an 84.5cm inseam if that info helps.
Thanks!
Do it... you won't find any difference unless it becomes some sort of self-fulfilling prophecy (i.e. you think you will so you do...)... I'd love to get some of those people who claim they can spin better with one or another and give them blind tests with different length cranks... I'll bet they won't be able to distinguish one from another...