**Bulls-Eye pin**: The unique KMC bulls-eye pin riveting provides unsurpassed side plate retention.**X-SP treatment**: KMC's extreme stretch-proof treatment of pins and 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 and plates, made out of special alloy material, reduces chain stretching and thus prolongs chain life.**X-Bridge**: The x-bridge outer plate has been configured with precisely articulated angles for quicker and smoother gear shifting and quieter riding.* 1/2" X 3/32" - 114 Links, pin length 7,3mm* Compatible with: 18-21 24 speed HG* Half Nickel plated* Hi-Performance* Extremely Durable