The Box Two cassette was where Prime 9 started. Originally conceived as an E-MTB product to deliver long service life and extra range over fewer gears, we quickly grew to enjoy its abilities on unpowered MTBs.  

• Cogs Pinned to Lightweight Spiders

• Ultra-Wide Ratio with Consistent Progression

• Prime 9 Technology

• Box's Most Durable Cassette

• Compatible with HG Freehub Bodies