SRAM Cassette XS-1299 T-Type Eagle 10-52t 2023: 10-52T

SRAM XS-1299 T-Type Eagle Cassette 10-52t — XX SL Eagle Transmission

The SRAM XS-1299 T-Type Eagle Cassette is the top-tier cassette in SRAM's Eagle Transmission (T-Type) ecosystem, engineered specifically to work with the T-Type derailleur and drivetrain components as an integrated system. Direct derailleur-to-cassette contact ensures precise alignment on every ride, and the full X-SYNC tooth design is built to maintain or improve shift quality under load — the harder you pedal, the more securely the chain is controlled.

What It Does

• Delivers a 520% gear range across a 10-52t spread
• Improved low-end gear progression with 44t and 38t cogs stepping down from the 52t (refined over standard Eagle 10-52t cassettes)
• Gears 1–9 use a fully machined, hardened steel X-Dome architecture for durability and shifting accuracy
• Gears 10–12 use an ultra-lightweight all-aluminium Spider Cog to reduce overall weight
• Claimed to be SRAM's lightest Eagle cassette to date at time of launch
• Includes a clearly marked Setup indicator to aid installation alignment

Technical Insight

The XS-1299 is engineered exclusively for the T-Type Eagle Transmission ecosystem. It is not a drop-in replacement for standard Eagle drivetrains — confirm T-Type compatibility before purchase.

Why Torque Collective Stock This

For eMTB and high-performance MTB builds running SRAM's T-Type transmission, the cassette is a core component, not an upgrade. The integrated design philosophy behind T-Type means cassette choice directly affects system performance. We stock the XS-1299 because it represents the flagship specification for riders building or maintaining a T-Type drivetrain — where longevity, precise shifting under load, and minimal drivetrain weight all matter.