Box Two Prime 9 9-Speed Cassette

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, Box quickly grew to enjoy its abilities on unpowered MTBs. All sprockets are stamped from steel and subsequently, the larger ones are pinned to alloy spiders. Due to its provenance, this is, without doubt, the most durable cassette in the range.

Technology

Prime 9

Prime 9 technology is a counter-intuitive philosophy based on the less is more theory. It embraces range wihtout adding complexity. The outcome is fewer parts, reduced weight, and increased durability.

Is Prime 9 Simpler?

• Same Range With Fewer Gears
• Ease of Set-up
• Wide Compatibility
• Less Maintenance
• Don’t Worry, All Bike Shops Are Familiar With 9 Speed Platforms!

Is Prime 9 More Durable?​

• Straighter Chain-line
• Unique 9-Speed Chain
• Single Shift Option (E-MTB)
• Fewer Gears (fewer shifts)
• ​Full Steel Cassette (all tiers)

Does Prime 9 Perform Better?

• Shifting Less Means Faster Riding
• Optimised Shift Ramps
• Consistent Gear Jumps
• Lightweight Cassette

Features

• Box's most durable cassette
• Steel stamped sprockets
• Lightweight alloy spiders
• Ultra-Wide ratio with consistent progression

Specification

• Process / Materials:
• Cogs: Stamped / Hardened Steel
• Spider: CNC / 6061-T6 Aluminium
• Lockring: CNC / 6061-T6 Aluminium
• Speed: 9
• Gearing: [11-50T] 11 - 13 - 15 - 18 - 22 - 28 - 34 - 42 - 50
• Compatibility:
• Platform: Non E-Bike
• Driver: HG Freehub Body
• Chain:
• Box One Prime 9
• Box Two Prime 9
• Box Three Prime 9
• Weight: 645g

Compatibility

• Box One Prime 9 Chain 126L DLC Black
• Box Two Prime 9 126 Link Chain Nickel
• Box Three Prime 9 126 Link Chain Polished
• Box One Prime 9 Rear Derailleur
• Box Two Prime 9 X-Wide Rear Derailleur
• Box Three Prime 9 X-Wide Rear Derailleur
• Box One Prime 9 Shifter
• Box Two Prime 9 Shifter
• Box Three Prime 9 Shifter