SRAM Cassette XG-1299 Eagle 12 Speed: RAINBOW 10-52T

SRAM XG-1299 Eagle 12-Speed Cassette – Rainbow 10-52T

The XG-1299 is SRAM’s flagship 12-speed Eagle cassette, built for riders who want the full 500% gear range in a single-ring drivetrain without compromise on strength or weight. The Rainbow colourway adds a distinctive anodised finish across the cassette body.

What It Does

Running a 10-52T spread across 12 speeds, the XG-1299 delivers a wide gear range suited to technical climbs and fast descents on trail, enduro, and eMTB builds. The cassette uses SRAM’s X-DOME architecture, which independent testing has identified as among the strongest cassette constructions available. Shifting performance is engineered for clean inboard and outboard transitions, with improved chain retention across the range.

Compatibility

• Requires an SRAM XD Driver Body – not compatible with standard Shimano HG freehubs
• Designed for use with SRAM Eagle 12-speed chains and derailleurs
• Part number: FW8107002

Real-World Notes

The 10-52T range makes a genuine case for running 1x on demanding terrain. The cassette is notably lighter than comparable 2x setups, which matters on longer eMTB rides where rotational weight still has an effect on handling feel.

Why Torque Collective Stock This

The XG-1299 sits at the top of the Eagle cassette range and is a natural fit for the trail, enduro, and eMTB builds we work on in the workshop. The wide gear range, robust X-DOME construction, and XD-Driver compatibility make it a spec we see on performance builds regularly. The Rainbow finish also makes it a popular choice for riders who want their drivetrain to stand out.