Details The Box Three Prime 9 cassette is a great all-around cassette option. All cogs are stamped from steel and subsequently, the larger ones are pinned to alloy spiders. It also features weight-reducing holes on the cogs. The Box Three Prime 9 offers ultra-wide ratio with consistent progressions Prime 9 technology offers the same range as a 12-speed drivetrain, with fewer gears to shift through Fewer parts, reduced weight, and increased durability Cogs pinned to lightweight spiders Constructed using a standard freehub body (HG) Cassette Cogs: 12-14-16-18-22-28-34-40-46 Color: Black Designed for ebike: Yes Cassette Body Type: Shimano/SRAM 8, 9, 10 Speed Range: 12-46 Drivetrain Speeds: 9 Defined Color: Black