I'm more of a spinner than a masher. From what I've read, a shorter crank arm length is more beneficial to my type of pedal cadence than a longer one. Also, I've done some calculations, and most authorities on the subject recommend a smaller length crank arm for my size.

FYI, I am 5' 8" with a 31" inseam (not pant size inseam, but a measured inseam). I am currently running a 175, but would like to try a 170 to see if I like it better. I can always sell my 175s if I like the new set-up better, and mitigate the expense.

It's either that, or I have entirely too much time on my hands to think about such things!!!!