Made from 7075-T6 aluminum for high strength and light weight. CNC machined for an exact fit. Special tooth design increases chain contact and significantly extends the sprocket life. Grooved teeth maximize sprocket life by preventing dirt build-up. Finis If you want the perfect combination of light weight and high strength this sprocket is for you. 7075-T6 aluminum is super strong, minimizing the risk of a broken sprocket, even in the most rutted conditions. Supersprox's unique tooth design is more robust than the competition and extends the sprocket life. Grooved teeth prevent dirt build up under the chain rollers, extending chain life. Finished in durable anodized colors to match your bike.