Having issues trying to index brand new chorus 12 speed on new frame, when on large from ring going from 12th down at rear first 4 shifts work fine then after that chain wants to jump up to next ring when I adjust so it runs ok but it then fails to shift from 12th up again as loosened to much anyone have any ideas?
Having issues trying to index brand new chorus 12 speed on new frame, when on large from ring going from 12th down at rear first 4 shifts work fine then after that chain wants to jump up to next ring when I adjust so it runs ok but it then fails to shift from 12th up again as loosened to much anyone have any ideas?