SRAM Force XG-1270 E1 Cassette Next generation cassette technology The SRAM Force XG-1270 E1 Cassette brings increased performance and advanced technology to next-gen drivetrains. Designed with cues taken from top-of-the-line SRAM Red E1 cassettes, this version of the XG-1270 Cassette features X-Range gearing, with at least 5 one-tooth jumps on most cassettes, for more useable gears for every rider. The nickel-chrome plated design quiets the drivetrain and increases durability, while the FULL PIN cassette construction for reduced weight and increased strength. Features FULL PIN cassette construction for increased cassette durability and reduced weight X-Range gearing is gearing that's optimized for modern road bikes, with a wider range, smoother gear progression, and more useful gears Uses XDR Driver freehub standard to achieve a wide gear range, including a 10-tooth small cog (not compatible with XD freehubs)Specifications Available Cassette Ranges10-28T, 10-30T, 10-33T or 10-36TCassette Body Type SRAM XDR(TM)Drivetrain Speeds12 | Sram | Xg-1270 12 Speed Cassette 10-28T