KMC X12 Chain Description: The KMC X12 chain is a durable and versatile chain that is rugged enough for a mountain bike, and light enough to not weigh a road bike down. The double X-bridge shaping of the plates in addition to extensive chamfering of the edges of the plates help this chain to mesh better and more quickly to gear teeth, resulting in a much better shifting quality. A special heat treatment and solid, mushroom riveted pins resist wear and chain stretch, resulting in a long lasting chain. Last but not least, these chains are non-directional and are compatible with 12 speed drivetrains from Campagnolo, Shimano, and SRAM. Features: Chain is compatible with Campagnolo, Shimano, or SRAM 12-speed systems Mushroom riveted pins for the highest pin power and allows shifting under heavy loads Double "X" bridge shape allows for better meshing with gear teeth for smoother shifts and better durability Extensive chamfering of the inner and outer plates allow for more accurate shifting Heat treatment reduces the rate of chain stretch for a longer lasting chain Not compatible with SRAM eTap and Flattop drivetrains Specifications: Speeds: 12 Speed Links: 126 Chain Width: 5.2mm Chain Connector: Missing Link (Reusable) Pin Type: Mushroom Riveted (Solid) Color: Gold Weight: 234g