The SRAM XG-1290 E1 Rainbow Cassette is engineered for smooth and fast shifting and offers new gear ranges. This is the 10-36T version. The innovative 10-tooth start provides an expanded gearing range, catering to diverse riding conditions and terrains. For the first time, the 10-30T and 10-36T options are available in the Red series, offering more versatility to riders. Compatible with the XDR driver body, this cassette is designed for easy integration into modern drivetrains. The one-piece machined steel X-DOME design not only delivers significant weight savings but also enhances durability and strength. The SRAM XG-1290 E1 Rainbow Cassette is an innovative component that will dial in your shifting performance.