SuperSprox Steel Rear Sprocket Honda / Yamaha R1 / R1M Features: Developed on the race track to give longer system life and high performance for street and off-road applications Supersporx uses CAD designs and CNC-Laser cutting to ensure an exact fit on the wheel Supersprox has high quality standards which include their exclusive (2Xzink) anti corrosion finish One of the lightest steel sprockets on the market Factory styling for a great look