SRAM XX Eagle T-Type XS-1297 Cassette - 12-Speed, 10-52t, For XD Driver, Silver/Black

The SRAM XS-1297 XX Eagle Transmission (T-Type) cassette is a core component of a drivetrain system engineered to deliver peak performance when pedaling hardest. It features a massive 520% gear range that improves upon previous generations by offering smoother gear progression on the low end, specifically using 44- and 38-tooth cogs before reaching the 52-tooth exit gear. This "Full X-Sync" technology allows for the most advanced inboard and outboard shifting performance ever achieved, even under the extreme loads generated by modern mountain biking and high-torque electric motors.

The construction of the cassette relies on a hardened tool steel machined X-Dome design for the main cluster, which provides exceptional strength and a long wear life. To manage weight without sacrificing durability, the 12th gear is a lighter aluminum "Spider Cog" that reduces rotational mass where it matters most. The entire unit is optimized for a 55mm chainline, which results in less extreme chain angles throughout the range and further enhances the precision and longevity of the system.

Installation is straightforward thanks to a clearly marked "Setup Cog" that ensures perfect alignment during the initial bike build or maintenance. This cassette is designed exclusively for use with the widely adopted XD driver body, making it a versatile choice for many high-end wheelsets. By operating as a fully integrated and interdependent part of the Eagle Transmission, this cassette ensures that shift quality remains crisp and consistent regardless of how much power is being put through the pedals.