Supersprox – Racing Steel sprocket. Developed on the race track, to give longer sprocket life and high performance for all street and offroad bikes. Using CAD Designed and CNC-Laser cutting, to ensure an exact fit on the wheel. Made to Supersprox high quality standards and include our exclusive (2XZINK) anti corrosion BLACK finish. They will last 3 longer than any aluminium sprocket. One of the lightest steel sprockets on the market. With the factory styling. you are not compromising on design.