The kmc x8 93 8 speed chain the chains unique kmc bulls eye pin riveting provides unsurpassed side plate retention kmc39s extreme stretchproof 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 the pins and plates are made out of special alloy material that reduces chain stretching and thus prolongs chain life the x bridge outer plate has been configured with p