The KMC X-Series was developed with the specific characteristics of the Shimano, SRAM and Campagnolo systems in mind. Thanks to precisely chamfered plates, the X-Bridge technology enables perfect shifting and smooth propulsion in all riding situations. The X Series enjoys the trust of many top athletes in professional cycling.   Regarding the specific characteristics of Shimano, SRAM and Campagnolo systems KMC developed a series meeting the highest demands. Precisely engineered, their dynamically chamfered plate angle provides a perfect shifting performance and a smooth transmission.   Please Note: Due to the colouring process for the Aurora chains, the colour may not be a perfect match to the image shown   Features: Includes non-reusable 12x Missing Link. Double X Durability. Pin length: 5.2mm. Size: 1/2" x 11x128". Non-directional. Compatible with all 12x drivetrains (except SRAM Eagle Transmission T-Type, 12-speed road/gravel). Weight: 268g (126 links).