The SHIMANO ALIVIO FC-M4000 crank uses an OCTALINK bb interface and features 40-30-22T 3x9 speed chainrings.with bottom bracketwith chain guardcompatible BB type: Octalinkaverage weight: 860 gchain ring combination: 40/30/22Tcrank Arm Length: 175 mmP.C.D. (mm): 96/64threaded BB Shell Width: 68 mm Out of stock |