Sometimes less is more. With 10-speeds, 11-48t range and evenly spaced gear steps, the ADVENT X cassette allows riders to shift less often to find the right gear, while still having enough range to ride what they want. Fewer cogs also means less weight, a wider chain for better mud shedding -- it even fits on standard 10-speed freehub bodies so you don't need to buy new wheels for no reason. In short, it's everything you want in a high end drivetrain. FEATURES: 11-48t range with even gear steps for predictable gear changes Hardened steel cogs are optimized for eBike compatibility ED black with anodized surface finish Continuously forged precision cogs SPECS: Cassette Body Type: Shimano/SRAM 8, 9, 10 Speed Designed for ebike: Yes Drivetrain Speeds: 10 Range: 11-48