Box One Prime 9 X-Wide 9-Speed Derailleur

The Box One Prime 9 Rear Derailleur takes the advantages of Box's legacy 9-speed drive-train but adds the advancements of a modern 1 by; a fully adjustable Tri-Pack Clutch, and an x-wide cage optimised for an 11-50 Tooth cassette. Forged construction steps up the durability and performance to an unparalleled level. Suited for the most demanding terrain.

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 best performing derailleur
• For aggressive terrain
• Adjustable tri-pack limited slip clutch
• Precision sealed bearing pulleys
• Pivot-Tech cable stay

Specification

• Process / Materials:
• B-Knuckle: 3D Forged / Aluminium
• P-Knuckle: Injection Molded / Carbon-Nylon Composite
• Linkages: 3D Forged / Aluminium
• Cage: Forged / Aluminium
• Speed: 9
• Compatibility:
• Platform: Non E-Bike / E-Bike
• Derailleur:
• Box One Prime 9
• Box Two Prime 9
• Box Three Prime 9
• Derailleur Hanger: Non-Direct Mount
• Weight: 290g

Compatibility

• Box One Prime 9 11-50T and also 12-50T E-Bike Cassette
• Box Two Prime 9 11-50T and also 12-50T E-Bike Cassette
• Box Three Prime 9 11-50T and also 12-50T E-Bike Cassette
• 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 Shifter
• Box Two Prime 9 Shifter
• Box Three Prime 9 Shifter