The Substance cranks from BSD. These cranks feature a 2.5 piece design which means the whole crank set can be tightened with just one 8mm bolt. The Arms are made from heat treated 4130 with a rectangle cross section for extra stiffness and a extra beefy pedal boss for strength with angled back for frame clearance. The Spindle is a heat treated, ultra hollow design with a 22mm diameter and 48 splines. Available in 165mm lengths in chrome. RHD and LHD compatible.