Sram: OVERVIEWMake that daily ride from your front door a little spicier with some dirt. The 440% range of the XPLR XG-1271 cassette provides smooth gear progression when you’re sweating up gravel climbs, and tight jumps on the high end for when it’s time to drill it on asphalt. Shift features on each cog are optimized for electronic shifting, so you’ll get fast, smooth and precise shifts every time.FEATURESX-Range gearing gives you more range and a smoother gear progression, so you’re always in the right gear440% range gives the coverage 1x gravel riders wantFor use with XPLR 1x rear derailleursCompatible with Flattop chainsCompatible with XDR driver bodyAll Zipp wheels starting from 2015 are XDR readyMINI CLUSTER technology with aluminum large cog for light weight and durability SPECIFICATIONSSpeed (CS): 12sGearing: 10-44tCog finish (Cassette): Nickel ChromeTechnology (Cassette): XGCog sizes: 10-44t:10,11,13,15,17,19,21,24,28,32,38,44Driver body interface: XDR