3-piece design Bolt-drive crankMaterial: 7000 aluminiumLenght (mm): 170, 175Spindle: 22mm hollowSpindle splines: 48Extra info:one piece forged alloy crank arm for ultimate strength,rhd & lhd compatible,investment cast pedal & spindle boss,compatible with spline drive and bolt drive sprockets,comes supplied with assembly toolWeight (kg): 0.981 (175mm)Color: black, gold, high polished