SRAM XX1 Eagle XG-1299 Cassette - 12 Speed | 12-50t | Rainbow

What makes the SRAM XX1 Eagle XG-1299 Rainbow Cassette worth the price?

The XG-1299 is the top-tier Eagle cassette, built around SRAM's X-Dome architecture that machines cogs from a single piece of steel for extreme durability and a weight savings that stack up fast on a performance XC build. The 12-50t range delivers a full 500% gear spread in a 1x system, covering everything from steep technical climbing to flat-out sprinting without a front derailleur complicating the equation. The rainbow anodized finish is the signature look of XX1 Eagle AXS and pairs perfectly with the matching chain and drivetrain components.

Requires an XD driver body and is compatible with Eagle AXS wireless shifting for optimized engagement geometry on each cog. Shift ramps on every sprocket are designed to work specifically with electronic actuation, so you get fast, precise shifts under load in both directions. SRAM has also validated this cassette for E-MTB use, so the durability spec covers the extra torque those drivetrains produce. At this level, it is not just a cassette, it is the foundation of the whole Eagle ecosystem.