As we advance on our gravel bike and begin to encounter more technical terrain at fast speeds, we need a bigger range of gears to keep up, so we turn to the SRAM RED XPLR 13-Speed Cassette for the necessary gearing. The expanded 460% range of this 13-speed cassette features a 10-46t cassette designed to provide us with the gears necessary to climb up hills with ease and offer the tight jumps we seek for sprints on the flat or downhills.