The Force XG-1270 12-Speed Cassette is designed for the next generation of drivetrains and the next generation of riders. The SRAM Force XG-1270 cassette is optimised for electronic shifting and features our X-Range gearing technology. Smooth, precise shifts, from 10T on up.X-Range gearing gives you more range and a smoother gear progression, so you re always in the right gearMini Cluster construction reduces weight and increases durabilityDesigned to work with an XDR driver bodyAll Zipp wheels starting from 2015 are XDR readyNow includes 10-36 option for even more range (must be used with the correct Force eTap AXS rear derailleur)