D.I.D's X-Ring chain is designed for today's high performance motorcycles. The patented X-Ring construction creates a chain that is low in friction and high in wear resistance. D.I.D's new X-Ring chain is as original equipment on Ducati 916's. D.I.D's sealed chains incorporate D.I.D's uniquely designed seal-rings which seal D.I.D's special "V" grease in the pin/bushing area and lock dirt out. They are expected to last at least ten times longer than ordinary construction standard chains without significant wear elongation under satisfactory maintenance.