SRAM XS 1299 T-Type Eagle Cassette Best-Ever Inboard and Outboard Shifting Performance Under Load Not all drivetrains are created equally. If you're looking for the top of the line performance, then you're in the right place. The SRAM XS 1299 T-Type Eagle Cassette offers the best-ever inboard and outboard shifting performance under load. Thanks to its full X-SYNC design, the harder you pedal, the better it shifts. Its new-gen design is fully machined, hardened steel X-Dome architecture for gears 1-9 and an ultra-lightweight, all-aluminum Spider Cog for gears 10-12. Engineered as integrated and interdependent transmission components, the XX Eagle Transmission Cassette and derailleur contact directly, ensuring perfect alignment on every bike. Features X-SYNC for the best-ever inboard and outboard shifting performance under load55mm chainline compatibility for more moderate chain angle, longer wear, and greater precision Hardened steel X-Dome architecture for gears 1-9 and an ultra-lightweight, all-aluminum Spider Cog for gears 10-12Specifications Cassette Body Type XDCassette Cogs10, 12, 14, 16, 18, 21, 24, 28, 32, 38, 44, 52Drivetrain Speeds12Cassette Material Aluminum Weight TBD | Sram | Xs 1299 T Type Eagle Cassette 10-52T 12 Speed