SRAM XG-1290 12 Speed CassetteTaking you through the gears quickly and efficiently, this quality cassette by SRAM is optimised for use with innovative electronic shifting setups. Providing a more gradual progression from cog-to-cog, it features a 10-tooth start and a wider gear range to get you through every part of your ride with confidence. Clean Shifting PerformanceBuilt with a one-piece steel X-Dome design, the cassette maintains a low weight for high-performance and works ideally with XDR driver bodies. This superb SRAM model ensures a smooth and swift shift on every outing. Features: Speed: 12 speed Technology: XG Compatibility: XDR Driver Body Cog Finish: SilverBuy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.