When it comes to adventurous riding, a wider gear range is often better. The ADVENT cassette has the low gears to get up and the high gears to get back down. Steps between gears are optimized to give an even spread between shifts, reducing the need for double-shifting to find the right gear.Features-microSHIFT's “Wide Enough” 11-42T gear range works well for a variety of skill levels and riding conditions-Chromoly cogs are continuously forged for strength and shifting accuracy-Compatible with Shimano HG freehub body standard-ED black surface finishItem Specifications-Cassette Body Type:Shimano/ 8, 9, 10 Speed-Cassette Cogs:11-13-15-18-21-24-28-34-42-Drivetrain Speeds:9-Range:11-42-Designed for ebike:Yes