Rant Bangin' 8 Cranks style: RHD (right-hand drive) / LHD (left-hand drive) compatible material: 4130 trapezoid shaped heat-treated tubular chromoly arms | heat treated chromoly spindle spindle: 19mm | 8-spline | chromoly spindle bolts: 8mm x 1mm (2) arm length: 175mm color: black additional information: 3-pc design wrap welded pedal bosses for additional strength