SUPERSPROX Rear Sprocket 48T AluminiumALL YZ+F 99-17 BLUE• CNC machined to incredibly tight tolerances, that allow perfect concentricity and accuracy of fit• The Works-Light design has allowed optimum weight reduction, whilst keeping the product super strong. Its 67% lighter than steel sprocket!• Supersprox patented tooth profile will increase chain life up to 15%. Chain vibration (slap) will reduced. Giving smoother acceleration.• The exceptionally hard wearing surface and dirt grooves will give signifi cantly increased chain wheel life. It will outlast the competition.• The anodised anti corrosion surface is technical and attractive. Its hard coating aids prolonged system life.• Perfect for Supercross, Motocross and Off Road bikes.