Will a 2.5mm crank difference be worth it?

Sorry my reaction wasn’t what you said in the thread’s context but what felt like a blanket statement of “you’ll never notice a difference”

A lot of people are quick to chalk crank length choice to just personal preference and not an important aspect when it affects fit, cycling dynamics and even your gearing (i.e. 172.5 crank on same gearing is noticeably easier to turn than 170)

So I agree that op might not benefit or need a crank length change but I wouldn’t go as far to say he wouldn’t notice a difference or not benefit/suffer from it.


I went from 170 to 167.5 and found an immediate effect on my pedaling. I don’t know if I’m more or less efficient but it sure felt better to pedal.

After about 6 months I went from 167.5 to 165. My thought was that I should’ve just moved directly to 165mm.

170mm cranks are easier to come by than 172.5. If you’re experimenting I’d suggest going “too far” and then walking it back if you don’t like it.

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