The rear sprocket is made from hardened steel or aluminum for a balance of durability and weight. The X-ring chain features internal lubrication sealed by rubber rings providing a much longer lifespan and quieter operation than standard chains. This kit is designed for high-torque motorcycles reducing the need for frequent chain adjustments. It provides a smoother ride and better acceleration by reducing friction in the drivetrain. All parts are perfectly matched to ensure optimal wear and performance.