SRAM XG-1299 Eagle 12 Sp CassetteAll set for exploring the MTB trails, this 12 speed cassette features an aluminium largest cog, while its other cogs are equipped with a robust steel construction. This gives it the perfect balance of strength and weight, so you can enjoy its exceptional power transfer while wear is also minimised. SRAM has kitted out this model with its renowned Eagle technology that is lighter, simpler, more durable, and easier to use. Another highlight is its superb colour system that makes it look as amazing as it performs on the mountain bike trails.- Stronger riders can increase chainring size for speed, without sacrificing climbing- Eagle Colorsystem lets the cassette and chain express the look of the bike- Provides a massive 520-percent gear rangeRange of DreamsWhether for prized race machines or the build of their dreams, the XG-1299 cassette is the ultimate, giving riders unprecedented 520-percent range thanks to the new 10-52 tooth-span. Stronger racers are now free to choose larger chainrings for more top-end speed, without sacrificing climbing range. More time is spent higher up in the cassette where athletes power transfer is most efficient and wear is minimized. Featuring the industry's strongest X-Dome architecture and proven XD driver body, it's also backwards compatible to give riders even more Eagle upgrade options for their current bikes. With multiple Olympic, World Cup and World Championship titles, it also matches up perfectly to XX1 Eagle AXS enabled componentry. The XG-1299 cassette utilizes the full depth of the new Eagle Coloursystem. Available in Gold to Rainbow and all-new Copper, the XG-1299 cassette completes the expression of the worlds most accomplished and sought after bikes.Features: Material: Largest Cog: Aluminium; 1-11 Cogs: Steel Use: MTB Speed: 12 speed Gear Ratio: 10-52T Cassette: XG Cog Sizes: 10-52T: 10,12,14,16,18,21,24,28,32,36,42,52 Driver Body Interface: XD Part Numbers: Copper: FW8107000; Gold: FW8107001 and Rainbow: FW8107002 Weight: 370g (approx)Technologies: Driver Body XD: Is a new cassette driver body design that allows the use of a 10 tooth small cog and provides an improved interface with the cassette. X-DOME: X-DOME technology creates an incredibly lightweight, precise and strong cassette. The open design aids in mud clearance, giving you cleaner shifting performance and longer component life. Eagle: Eagle technology represents our newest 1x drivetrain technology. Eagle is a lighter, simpler, more durable, and easier to use drivetrain. Eagle features all-new 1x components, engineered for even greater durability and performance while maintaining a significant weight advantage over other drivetrain solutions. Eagle technology also provides an expanded gear range of 500%, while is equal to 2x11 drivetrains. X-Glide 2: X-GLIDE 2 is the next generation of SRAM X-Glide technology optimised for the Eagle 12-speed cassette. It provides quick, precise, power-on shifting performance throughout the gear range, and increases chain retention on larger cogs.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.