SRAM XS 1297 T-Type Eagle Cassette Best-Ever Inboard and Outboard Shifting Performance If you're looking for top-of-the-line shifting performance, then look no further. The SRAM XS 1297 T-Type Eagle Cassette is a major reason why Eagle Transmission 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. The XX Eagle Transmission Cassette and derailleur contact directly, ensuring perfect alignment on every bike. It features a massive 520% gear range, the 52T cog steps down with improved gear progression with 44 and 38T cogs in the low end. It features 55mm chainline compatibility for a more moderate chain angle, longer wear, and greater precision. Features X-DOME with a lighter aluminum 12th gear Full X-SYNC for best-ever inboard and outboard shifting performance under load55mm chainline compatibility for a more moderate chain angle, longer wear, and greater precision Specifications Cassette Body Type XDCassette Cogs10, 12, 14, 16, 18, 21, 24, 28, 32, 38, 44, 52Drivetrain Speeds12Cassette Material Aluminum Weight341 g | Sram | Xs 1297 T Type Eagle Cassette 10-52T 12 Speed