BOX Two Prime 9 Cassette Massive Rang Without the Price Tag BOX's Prime 9 drivetrain is designed to provide a massive mountain bike gear range in an affordable and simple package. The Two Prime 9 cassette offers an 11-50t gear range, effectively offering the same gear range as more expensive drivetrain options from SRAM or Shimano. The Two Prime 9 cassette sits in the middle of BOX's Prime 9 drivetrain tier, providing a terrific bang-for-buck value. It's also the most durable cassette in the Prime 9 lineup. Manufactured out of hardened steel for increased durability and an alloy spider to keep weight low, the BOX Prime 9 cassette strikes an excellent compromise between durability and weight. The 9-speed gearing setup may not be ideal for cross country riders but it makes a lot of sense for all-mountain and enduro riders in search of a bombproof drivetrain option that gets them to the top of the trail without having to stop. Whether you're upgrading to a Prime 9 drivetrain or you're just in search of a replacement cassette, the BOX Two Prime 9 cassette is a great choice. Features Massive 11-50t gear range ensures you'll be able to climb anything Durable design means the cassette is long lasting and can handle countless mile Hardened steel cogs and alloy spider strikes a great balance between weight and durability ONLY COMPATIBLE WITH BOX PRIME 9 DRIVETRAINSONLY COMPATIBLE WITH SHIMANO 9, 10, 11-SPEED FREEHUBSSpecifications Cassette Body Type Shimano 9, 10, 11-Speed Cassette Cogs11-13-15-18-22-28-34-42-50Drivetrain Speeds12Cassette Material Hardened Alloy Steel, Aluminum Weight645 g | Box Components | Box Two Prime 9 Cassette | Black | 9 Speed, 11-50T