SRAM XG-1299 Eagle 12 Speed MTB CassetteThe SRAM XG-1299 cassette is part of the top of the line XX1 range and the shining star of their 12 speed Eagle system with its distinctive gold coloured Ti Nitride finish and contrasting black 50T bailout cog. It's finally time to say goodbye to that front derailleur for good as XX1's 10-50T sprockets give you the same gear range as most 2x drivetrains, but at a much reduced weight.This cassette is designed for use with SRAM's race proven reliable XD driver body so you don't have to worry about upgrading your rear hub or wheel again. It also features SRAM's X-DOME architecture, which has been independently tested and found to provide the strongest cassettes on the market.That's not all though, the XX1-1299 benefits from X-GLIDE 2 technology, providing unrivalled shifting performance and the ultimate in chain retention, so you can just focus on the ride without worrying about your drivetrain.Features: Material: Machined CrMo 11t cog cluster with Aluminium 50t cog SRAM's cassette manufacturing technology provides the greatest durability and lightest weight All-new shifting features create a smoother, quieter system with enhanced inboard and outboard shift performance XD driver body compatible Gear Ratios: 10-50T (10, 12, 14, 16, 18, 21, 24, 28, 32, 36, 42, 50) 500 Percent Gear Range  Speed: 12-speed Compatibility: XD driver body compatible Recommended Chain: Eagle chain Weight: 355g Technologies: 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. X-Glide 2: X-GLIDE 2 is 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. XD 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. Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.