Sram XX SL Eagle Sprocket Set XS 1299 T-Type Eagle 12s

The XX SL Eagle Transmission (T-Type) cassette is one of the main reasons why Eagle Transmission offers the best inboard and outboard shifting performance under load. Thanks to its full X-SYNC design, the harder you pedal, the better the shifting. This is the lightest Eagle cassette in history, as well as our most accurate and longest-lasting. Its new generation features a fully machined hardened steel X-Dome architecture for gears 1-9 and an ultra-lightweight all-aluminum Spider Cog for gears 10-12. Designed as integrated, interdependent drivetrain components, the XX Eagle drivetrain and derailleur make direct contact, ensuring perfect alignment on every bike. From its massive 520% gear range, LThe 52-tooth gear drops with better gear progression with 44- and 38-tooth cogs on the low end (compared to the Eagle drivetrain's 10-52-tooth cassette).