This excellent chain from KMC features; Bulls-Eye Pin: The unique KMC bulls-eye pin riveting provides unsurpassed side plate retention. X-SP treatment: KMC's extreme stretchproof treatment of pins & plates makes this chain less susceptible to wear caused by sand or other exterior material invading into the chain bearings. Drastically enhancing durability. High alloy
Material: Pins & plates, made out of special alloy material, reduces chain stretching & thus prolongs chain life. X-Bridge: The x-bridge outer plate has been configured with precisely articulated angles for quicker & smoother gear shifting & quieter riding.