Exceptional gear range with a massive 520% spread from 10 to 52 teeth, delivering smooth and precise gear stepping for versatile mountain biking and trail riding applications. Constructed with full X-SYNC design and machined hardened steel X-Dome architecture for gears 1-9, combined with an ultra-lightweight all-aluminum Spider Cog for gears 10-12, ensuring durability, lightweight performance, and long-lasting reliability. Engineered with a lightweight aluminum Spider Cog and a fully machined steel construction, this 12-speed cassette offers improved weight savings without compromising strength or durability on rugged terrains. Optimized for XD freehub bodies with a 55mm chainline for enhanced chain stability, longer component lifespan, and superior shifting performance under load in demanding off-road environments. Designed with a clearly marked Setup Cog for easy installation and compatible with SRAM's integrated Eagle Transmission system, offering seamless, precise shifting and direct contact between cassette and derailleur for peak performance. Upgrade your mountain biking performance with the SRAM XX SL Eagle T-Type XS-1299 12-Speed Cassette, designed for serious riders seeking precision, durability, and lightweight efficiency. Crafted for extensive trail riding and aggressive cross-country adventures, this high-performance cassette features an impressive 10-52t gear range, enabling optimal cadence and powerful climbs on rugged terrain. Materials & Construction: Constructed with a fully machined, hardened steel X-Dome architecture for gears 1-9, ensuring exceptional strength and long-lasting durability. The innovative ultra-lightweight, all-aluminum Spider Cog for gears 10-12 significantly reduces weight without compromising strength, making it the lightest Eagle cassette SRAM has ever manufactured. The combination of robust materials and advanced engineering delivers a sleek, corrosion-resistant finish perfect for demanding riding conditions. Performance & Engineering: Thanks to SRAM's new-generation design, the XX SL Eagle cassette offers unparalleled shifting performance under load. Its full X-SYNC design enhances chain retention and delivers crisp, precise gear changes, even during aggressive riding or high-torque situations. The 55mm chainline optimization provides a moderate chain angle for enhanced efficiency, longer wear life, and improved drivetrain response. Components & Technology: Compatible with SRAM's XD driver body, this cassette offers seamless integration with existing 12-speed drivetrains. Its clearly marked Setup Cog simplifies installation, ensuring a fool-proof setup process. The included range of cogs-from 10 to 52 teeth-provides a massive 520% gear range, allowing riders to conquer steep climbs and accelerate on flats with ease. Style & Use Case: Designed in a sleek Silver/Black finish, the XX SL Eagle T-Type cassette combines high-end aesthetics with professional-grade performance. Ideal for cross-country racers, trail riders, and enduro enthusiasts looking for lightweight efficie