KMC Chains The main characteristic of the Diamond Like Coating is reduction of abrasive wear. Includes Diamond Like Coating for reduction of abrasive wear. Double-X durability guarantees unsurpassed durability. EcoProTeQ treatment doubles the rust resistance compared to the RB treatment. Titanium Nitride coating. Looks fantastic, ultra- smooth surface & extremely hard. KMC chains are compatible with all major shifting systems, there is no given direction. KMC’s X11SL weighs 237g. The very lightest of all 11-speed chains. Specially designed outer plate to enable fast, smooth and precise shifts. KMC e-Bike chains are specially designed for use in combination with strong mid motors. Optimized pinpower, higher tensile strength and unsurpassed durability are the key features of our e-Bike chains.