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)

BOX Three Prime 9 Cassette 9-Speed Cassettes UPC: 639266097341