The KMC E12 BlackTech Chain has been developed with additional safety reserves to cope with the extreme loads generated by e-bike mid-drive motors, while also performing superbly on conventional 12-speed drivetrains. Its defining feature is KMC’s proprietary BlackTech surface treatment - a two-step process in which each individual chain component is treated before assembly, then the process is repeated on the fully assembled chain, ensuring the black finish becomes an integral part of the material rather than a surface coating. The result is a chain that stays black, resists corrosion and wear, and delivers exceptional performance throughout its entire service life. Available in 130 links. Features Engineered with extra safety reserves for e-bike mid-drive systems Equally suited to conventional 12-speed drivetrains KMC BlackTech proprietary surface treatment - colour is integral to the material, not a coating Two-step BlackTech process: components treated individually, then again post-assembly Outstanding corrosion and wear resistance Compatible with Shimano, SRAM, and Campagnolo 12-speed systems 130 links