SRAM XG-1270 12 Speed CassetteEquipped with X-Range gearing technology and optimised for electronic shifting setups, this future-proofed cassette by SRAM is the perfect partner for the modern-rider. This top-end 12 speed model provides a 10-tooth start and a wider gear range for fast descents, letting you shift smoothly and swiftly as required. Speedy Shifting PerformanceBuilt with a Mini Cluster design, the cassette keeps a low weight and provides a high-level of durability to keep you powering on through the toughest routes. Compatible with XDR driver bodies, this excellent SRAM model takes you everywhere with efficiency and precision. Features: Speed: 12 speed Technology: XG Compatibility: XDR Driver Body Cog Finish: BlackBuy SRAM Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.