Shorter cranks?

[rij73]

See: http://www.nettally.com/palmk/crankset.html

I'm 5'6" with a 30 inch inseam. According to above, I should use a 165mm crank. My bike came with a 170, though, and I'm not going to change it unless a problem develops...

[spokewench]

I've ridden 165, and 170s. The 165's spin easier (faster), but the 170's give you more power (torque). I loved the 165s cause it was easier to spin up faster from stopped. I don't mind the 170s they are fine. Neither one gives me any trouble with fit or problems with pain or anything like that.