Box Three Prime 9 9-Speed Chain

The Box Three chain is polished and then chemically treated to achieve corrosion resistance. All Prime 9 chains have chamfered shifting edges, solid plates and solid pins to safeguard durability. Box's unique inner link spacing is engineered to grab those modern wide/narrow chainrings. Box chose to modernize the 9-Speed platform due to the chain's spirited reputation.

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 All-Rounder Chain
• Polished & Treated Protection
• Includes Connecting Link
• Compatible with BMX 3/32" Chainrings and Sprockets
• Compatible with most 10,11, & 12-Speed wide/narrow chainrings

Specification

• Process/Material:
• Stamped / Hardened Alloy Steel
• Pin Type: Solid
• Finish: Polished then Chemically Treated
• Speeds: 9
• Salt Spray Life: 15 hours
• Compatibility:
• Chainring: MTB 11/12-Speed Wide Narrow / BMX 3/32”
• Cassette: 9-Speed
• Weight: 305g /10.7oz

Compatibility

• Box One Prime 9 11-50T and also 12-50T E-Bike Cassette Black
• Box Two Prime 9 11-50T and also 12-50T E-Bike Cassette Black
• Box Three Prime 9 11-50T and also 12-50T E-Bike Cassette Black
• Box One Prime 9 Rear Derailleur
• Box Two Prime 9 X-Wide Rear Derailleur Black
• Box Three Prime 9 X-Wide Rear Derailleur Black
• Box One Prime 9 Shifter Black
• Box Two Prime 9 Shifter Black
• Box Three Prime 9 Shifter Black
• Box Two Chainring
• Box One Single Speed Aluminium Cogs
• Box One Single Speed Chromoly Cogs
• Box Two Freewheel