Why Is the SRAM XG-1299 Rainbow the Crown Jewel of Eagle Cassettes?

The SRAM XG-1299 Eagle cassette in Rainbow is the flagship of SRAM's mountain bike cassette lineup, the choice of multiple Olympic, World Cup, and World Championship winners. Built around the industry-leading X-Dome architecture, the entire 11-speed cluster is precision-machined from a single hollow steel block, then paired with an aluminum 52-tooth cog for an unmatched combination of strength, stiffness, and weight savings. The result is a cassette that shifts crisply, sheds mud and grime, and lasts season after season under serious abuse.

The 10-52t configuration delivers a massive 520-percent gear range, freeing strong riders to run larger chainrings for more top-end speed without giving up climbing range. The stunning Rainbow finish is more than just looks. It is a Ti Nitride coating that improves chain glide, sheds debris, and adds long-term durability. Pairs perfectly with XX1 Eagle AXS, S500 Eagle AXS, and any other 12-speed Eagle drivetrain on an XD driver body. This is the cassette for the build of your dreams.