Note: Image for illustration purposes onlyXCX Plus Cassettes are an elegant upgrade for any 11 speed Gravel or XC drivetrain. The 9t cog allows for more range in an overall smaller cassette, which means less weight and faster jumps between gears.XCX Plus 11 Speed Cassettes use 10 steel cogs, and 1 aluminium cogOur 9t cog allows for greater range in an overall more compact and lighter drivetrain. Smaller cogs allow for a smaller chainring, improving ground clearance and reducing the amount of chain needed. Less material, less weight.Aluminium cluster mounts to an XD™ Driver with a 3mm pinch bolt.Steel cluster mounts to the aluminium with a standard cassette spline tool.Removes simply with a chainwhip and cassette tool.Keeps your drivetrain simple and still gives the gear range of a 2X system. Key Features: Freehub Mount: XD™ and XDR™ Drivers Only,Material 1 aluminium Cog, 10 steel Cogs, Range:, 9-42T: 467%, 9-34T: 378%, .Size:, 9-42t: 9,11,13,15,17,20, 23, 27, 31, 36, 42, 9-34t: 9,11,13,15,17,19,21,24,27,30,34, .Weight: , 9-42T: 330g, 9-34T: 271g, ..