D.I.D X-Ring chain is designed for high performance motorcycles. Their patented X-Ring construction creates a chain that is low in friction and high in wear resistance. D.I.D's sealed chains incorporate D.I.D uniquely designed seal-rings which seal D.I.D special "V" grease in the pin/bushing area and lock dirt out. They are expected to last at least ten times longer than standard chains without significant wear elongation under satisfactory maintenance.