Originally Posted by
mschwett
i’ve never shortened cranks on a road bike, so here’s a dumb question. with such a drastic change, say 170-150, don’t you also end up moving the saddle up 20mm to maintain similar leg and foot extension at six o clock? and if so, doesn’t it also make it harder to put a toe down at a light or other stop?
seems like ideally if someone wanted 150mm cranks the BB would be 20mm lower than a bike make for 170mm cranks.
Only if you wish to keep the bike frame vertical.
I never have wished to keep the frame vertical when stopped. Why should I?. I stop all the time and stay in my saddle with one of my feet flat on the ground, the other on the pedal ready to go and the bike tilted to the side at whatever angle it takes to make the other happen.