The customer-favorite KMC Wax X11 chains treated with the KMC GO Waxed formula from the factory offer high efficiency and unrivaled durability. The Wax X11 is elaborately designed and manufactured with X-Bridge technology that allows a smooth propulsion and perfect gear changes in all driving situations. Don’t spend extra time waxing your new chain at home, buy a KMC pre-waxed chain, skip the mess, and go ride your bike!