nerdy question — BikeRadar
Road cycling forum
edited October 2008
Re Shimano road gears.
How how much cable pul (mm) is needed to shift one 9 speed Sprocket?
Big Red S
I think it varies along the sprocket.
No, cable pull is constant for each click of the shifter which moves the rear mech a set distance. Unfortunately even the great Sheldon Brown doesn't even have the info - but as far as I can determine indexing spacing is 4.35mm, pull ratio is 2.61 for Shimano 9 speed so cable pull is 1.66mm
Make mine an Italian, with Campagnolo on the side..
I have a plan to machine up a pair of 'cool' shifters...
its all about arcs, etc tto draw it up