BOX Three Prime 9 Cassette - 9-Speed, 11-50t, Black

Tackle steep climbs with the expansive 11-50t range of the BOX Three Prime 9 cassette. Engineered to provide the gear spread of a 12-speed setup across a simplified 9-speed platform, this drivetrain component reduces shifting frequency while maximizing durability and chainline efficiency.

Finished in a sleek ED black, it features steel stamped cogs equipped with weight-saving cutouts, with the larger gears anchored to lightweight alloy spiders. Built to endure demanding riding, this 550-gram cassette is fully rated for e-bike applications and mounts directly to standard Shimano/SRAM 8, 9, or 10-speed HG freehub bodies.

• Cog sizes: 11-13-15-18-22-28-34-42-50
• Compatible with standard HG splined freehubs
• Durable steel construction rated for e-bike use
• Consistent steps across an ultra-wide gear ratio