Well people on mods run for 158mm(i think), 160mm, 165mm and 170mm cranks. Is their advantages and disadvantages to running long and short cranks? Personly I run 160mm because when I was buying cranks 170mm sounded huge! But have recently rode a bike with longer cranks and am thinking of going back to some nice long ones what do you think? So basicly what are the reasons to run long and short cranks? Sam