SRAM XS-1299 Eagle Transmission Cassette— 12-Speed — 10-52T (XD Driver Compatible)

The SRAM XX SL Eagle Transmission Cassette is SRAM’s lightest and most advanced 12-speed cassette yet — built for riders who demand top-tier performance in a featherweight package. Featuring an all-aluminum Spider Cog and Full X-SYNC™ gear profiles, this cassette ensures crisp shifting under full load with smooth cadence transitions on climbs and descents. Designed around the proven XD driver, the XX SL cassette delivers durability, precision, and speed without compromise.

Key Features

• Lightest-ever SRAM 10–52T cassette with aluminum Spider Cog

• Full X-SYNC™ gear profiles for best-in-class shifting under load

• Optimized low-end steps for smoother climbing transitions

• 55mm chainline compatibility for better chain angle and durability

• Setup Cog simplifies T-Type derailleur installation

• XD Driver Body compatible — no need to change freehubs

• Sleek black finish for a clean, premium look

• Engineered as part of the Eagle Transmission (T-Type) system

Why Choose the XX SL T-Type Cassette?
This cassette is made for elite-level performance — whether you're racing enduro, pushing hard on big days, or just want the smoothest shifting possible. Lighter than X0 and XX, the XX SL cassette maximizes drivetrain response, efficiency, and reliability in one sleek setup.

Specs

Compatibility

• Compatible only with SRAM Eagle Transmission (T-Type) drivetrains

• Requires XD driver freehub body

• Not compatible with mechanical Eagle or AXS non-T-Type setups

• Must be used with T-Type chain and Full Mount derailleur

What’s in the box?
1x SRAM XS-1299 Eagle T-Type Cassette (10–52T)