The SRAM XX SL Eagle T-Type 12-speed Chain is a vital part of the revolutionary Eagle T-Type system. It features the longest life, strongest construction, and most efficient shifts. A unique flat top profile is used on the chain which results in smooth function and some of the most efficient gear changes possible. In fact, the harder you pedal, the better the shifts. A hard chrome finish adds to the strength of the chain, assuring a long life so you can focus on riding. Please note that the chain is not compatible with non T-Type products or eBikes. The SRAM XX Eagle T-Type Chain keeps your system running smoothly.