The KMC X12 12 speed Speed Chain is a quality replacement bicycle chain for Shimano, Campagnolo and SRAM drivetrain systems. Regarding the specific characteristics of Shimano, SRAM and Campagnolo systems KMC developed a series meeting the highest demands. Precisely engineered, dynamically chamfered plate angle provides a perfect shifting performance and a smooth transmission. 12 speed chain featuring the Double-X Durability and X-Bridge technology. Double X Bridge Shape for super-fast and smooth shifting.