As the terrain becomes more challenging and your pace quickens, having the right gear range and smooth transitions between gears is essential. The RED XPLR XG-1391 13-speed cassette offers an impressive 460% range, providing the climbing gears you need for gravel and the precise jumps required for fast sprints. With optimized shift features on each cog, you'll experience top-notch shifting quality even on the roughest roads, all from a lightweight cassette that weighs just 288 grams.