Small/Large size-specific for optimal shoe/pedal interface. 12 molded traction pins each side. Reinforced composite body is lightweight improves deflection and reduces hang-up during rock strikes. Concave platform for secure foothold (13.5-15.5mm thin). Igus bearings & seal system. Small recommended for size 5-10 (37-43). Large recommended for size 10-15 (43-49). 5 year warranty.Item SpecificationsBody MaterialCompositeSpindleCrMoSize9/16 ColorRedModel NameStamp 0 LargeWeight331g.