Designed for the next generation of drivetrains-and the next generation of riders. The SRAM Force XG-1270 cassette is optimized for electronic shifting and features our X-Range gearing technology. Smooth, precise shifts, from 10T on up. Features: X-Range gearing gives you more range and a smoother gear progression, so you&&';;re always in the right gear MINI CLUSTER construction reduces weight and increases durability Designed to work with an XDR driver body All Zipp wheels starting from 2015 are XDR ready Now includes 10-36 option for even more range (must be used with the correct Force eTap AXS rear derailleur)