E Thirteen XCX+ 11 Speed CassetteThis high-quality cassette enables you to take the performance features and engineering expertise gained from a decade of World Cup downhill racing to your gravel and XC riding. This model is incredibly lightweight and offers a large range in its class at a valuable price point. This is a perfect upgrade for tackling all the off-road challenges that come with gravel and XC riding.Features: Material: 1 Aluminum Cog, 10 Steel Cogs Use: MTB Speed: 11 speed Drivetrain Compatibility: SRAM and Shimano shift systems Range: 9-34T (378%), 9-39T (433%), 9-42T (467%) Ingenious assembly utilizes XD Driver mounting to enable a 9-44T and 9-46T 11 speed cassette Keeps your drivetrain simple and still gives the gear range of a 2X system Weight: 9-34T (271g), 9-39T (315g), 9-42T (330g)Buy E Thirteen Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.