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Crank Length???

Old 07-31-09, 11:43 AM
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Crank Length???

I just purchased a CADD 8 frame (to be picked up Sunday) and I have been looking at cranks as the first item I want to buy. It will be a compact crank 50-34 but which one I still don't know.

Cranks are offered in various lengths: 165mm, 170 mm, 172.5 mm and so on. How do I determine which is right for me? jerry
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Old 07-31-09, 11:57 AM
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How long are your legs? What's your riding style?

170mm arms are pretty much standard; shorter arms work for people with shorter legs and those who like to spin, and fixed gear bikes where cornering clearance might be a concern. Longer arms are for people with long legs or those how prefer mashing over spinning.
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Old 07-31-09, 08:23 PM
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Crank length is frequently determined by frame size by bicycle manufacturers. Small frame, short crank and big frame, long crank. My 58cm frame has a 175mm crank. My wife's 54cm frame has a 172.5mm crank.
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