SRAM XG-1391 XPLR E1 13-Speed Cassette Lucky Number 131x drivetrains changed the game when it came to shifting performance. No longer did you have to worry about both a front and rear shifter. As the terrain gets tougher and the pace gets faster, you need the right range to keep moving and the best steps between gears to keep up. The 460% range of the SRAM Red XPLR XG-1391 13-speed cassette gives you the climbing gears you crave on gravel and the tight jumps you need on spicy sprints. Enjoy the highest shift quality on even the roughest roads thanks to optimized shift features on each cog, all from a cassette that weighs only 288g. Features Expanded 460% range gives the added coverage 1x gravel riders demand For use with XPLR 1x 13-speed rear derailleurs Compatible with all road flattop chains and XDR driver bodies Specifications Cassette Body Type SRAM XDRCassette Cogs10, 11, 12, 13, 15, 17, 19, 21, 24, 28, 32, 38, 46Drivetrain Speeds13Cassette Material Aluminum Weight288g | Sram | Xg-1391 Xplr E1 13 Speed Cassette 10-46T