I’m 5’8”, sometimes 5’9” depending on which convenience store I walk out of.

Most my bikes have the default 170 campy cranks

I Was going though the crank drawer and noticed some 172.5 sets and a single pair of 175

do we base this on:
height?
inseam?
riding style?
flats vs hills?

I’ve read the longer cranks give more leverage but are harder on the knees.

shorter is better for those who prefer to spin more?

what’s the real rule of toe?