Patent ID: 8641151

Claim:
A sprocket support structure comprising: a main body including an outer surface with a plurality of parallel extending sprocket attachment splines defining a plurality of sprocket engaging grooves between the sprocket attachment splines; a plurality of projections extending radially outward farther than the sprocket attachment splines with respect to a rotation axis of the main body, each of the projections including a first surface that faces in a first axial direction of the main body and is configured and arranged to provide a first stop surface for a first sprocket support member; and an abutment ring being disposed on the main body as a separate member from the main body, the abutment ring including a second surface facing in the first axial direction and axially spaced from the first surfaces of the projections with respect to the rotation axis, the second surface of the abutment ring being exposed between the projections as viewed along the sprocket engaging grooves and configured and arranged to provide a second stop surface for a second sprocket support member.