Compatible with all 10-speed Road and MTB drive train systems DLC chains feature KMC`s Diamond Like Coating, which has an extremely hard surface coating ensuring long-term function, optimal stability and higher durability KMC`s SL Chains set a new standard with weight reduction, improved shifting performance & enhanced durability Double X-Bridge links offer improved shifting characteristics and function Hollow Inner and outer plates with chamferring 12sp 1/2x3/32 126L DB/XB/XSP/SL/DLC Red/Black 255g