Sunstar is the largest O.E.M. supplier of sprockets and brake rotors in the world. In fact, your motorcycle probably came from the factory with a Sunstar sprocket. Need a reason to choose Sunstar? Every Sunstar product is imbued with superior quality, uses an exclusive heat-treatment and quenching process, is based on advanced research and design, and is sold at an added value price. Constructed of high quality, aerospace-grade 7075 T-6 aluminum. Computer designed weight reduction holes for the best combination of lightness, strength and stability. Exclusive tooth-valley design provides up to a 50% better chain roller contact area for the best power transfer possible. A hard anodized coating is applied to provide a super durable finish to an already great sprocket. Longest lasting aluminum rear sprocket on today's market.