Track crank, also for use with internal gear hubs such as the Sturmey 3-speed fixed and 2-speed kickback Forged 6061 aluminum crank arm/spider with square BB taper Includes CNC machined, black anodized 7075 aluminum chainwheel (46 or 48t) *BB sold separately: use UR1961 103mm for 42mm chainline, UR1963 107mm for 43.5mm chainline 685g with ring