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.   BlackTech Is black and stays black. KMC BlackTech is not a simple coating, but a surface treatment in which the colour becomes part of the material. The process is two-step - firstly, each individual chain component is treated and then the process is repeated with the assembled elements. The chain thus permanently retains its rich black colour and is also highly resistant to rust.   Specification BlackTech technology. Includes non-reusable 12x Missing Link. Double X Durability. Non-directional. Compatible with all 12x drivetrains (except SRAM Eagle Transmission T-Type, 12-speed road/gravel). Weight: 268g (126 links).