XX SL Eagle Transmission Cassette

$96.59

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Estimated delivery dates: Jan 19, 2026 - Jan 20, 2026
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Description

The XX SL Eagle Transmission (T-Type) Cassette is the key to achieving the best-ever inboard and outboard shifting performance under load with Eagle Transmission. Its full X-Sync design ensures that the harder you pedal, the better it shifts, resulting in unrivaled precision.

This is SRAM’s lightest Eagle cassette to date, and it is built to last and provide maximum efficiency. The new-gen design is fully machined, with hardened steel X-Dome architecture for gears 4-12 and an ultralightweight, all-aluminum Spider Cog for gears 1-3.

Designed to work in conjunction with the XX Eagle Transmission Derailleur, the cassette and derailleur are engineered as integrated and interdependent transmission components that make direct contact, ensuring perfect alignment on every bike. With a massive 520% gear range, the 52-tooth cog steps down with improved gear progression with 44 and 38-tooth cogs in the low end, outperforming the Eagle drivetrain’s 10-52-tooth cassette. The Setup Cog is clearly marked, making installation simple and foolproof. Experience the ultimate shifting performance with the XX SL Eagle Transmission (T-Type) Cassette.

  • New-gen design is SRAM’s lightest ever 10-52T cassette due to the ultralightweight, all-aluminum Spider Cog
  • Full X-SYNC for best-ever inboard and outboard shifting performance under load
  • Optimized gear steps on low end
  • 55mm chainline compatibility for more moderate chain angle, longer wear and greater precision
  • Setup Cog for fool-proof set up
  • Utilizes well-accepted and broadly available XD driver body

Details:

Model: CS-XS-1299-A1
Gear Range: 10-52t
Cog Sizes 10-52t: N/A
Freehub Interface: SRAM XD
Material: Steel/Aluminum
Weight: 345 grams

SRAM Eagle Transmission AXS Compatibility:

The SRAM XX SL Eagle Transmission Cassette is compatible with the following:

Frameset: Any frame that fulfills the “UDH Specification” featuring a hanger-less interface can be upgraded. The SRAM UDH Bike Finder lists all UDH bikes that are compatible with Eagle Transmission.
Battery: SRAM AXS Battery
Bottom Bracket: SRAM DUB “Wide”: BSA73PF89.5PF92PF30 MTB73BB30
MTB73, BSA MTB68SP
Chain: XX SL, XX, or X0 Eagle Transmission chains
Chainring: XX SLXX, or X0 Eagle Transmission chainring
Cassette: XX SL, XX, or X0 Eagle Transmission cassette
Controller: AXS POD Controller, AXS Pod Ultimate Controller
Crankset: XX SL, XX, or X0 Eagle Transmission cranksets
Freehub: SRAM XD compatible freehubs
PowerLock: Eagle Transmission PowerLocks only
Rear Derailleur:  XX SL, XX, or X0 Eagle Transmission rear derailleur

SRAM Eagle Transmission is not compatible with previous-generation Eagle components. However, Eagle Transmission T-Type chainrings are backward compatible with Eagle chains, so they can be used on the current Eagle drivetrains. Non-T-Type Eagle chainrings will not work with Eagle Transmission chains.

Additional information
Range

Rear Speeds