BOX Three Prime 9 Rear Derailleur




The Box Three Prime 9 Rear Derailleur is a simple, but fully-featured and wallet-friendly rear derailleur. It includes a limited slip clutch, sealed bearing pulleys and a solid construction. It is compatible with 11-46 and 11-50t cassettes making it one of the most versatile derailleur offerings for Prime 9 drivetrains.

  • Prime 9 technology offers the same range as a 12-speed drivetrain, with fewer gears to shift through, less derailleur travel, and better chainline
  • Box Three Features: Limited Slip Clutch, stamped front/rear cage, direct channel cable stay, and bearing pulleys
  • The limited slip clutch engages instantly and offers constant torque for less chain slap, better chain engagement and no dropped chains
  • Stamped front and rear cage
  • Direct channel cable stay
  • Bearing pulleys
  • Color: Black
  • Largest Cog: 50
  • Rear Derailleur Mount Type: 10x1 Standard
  • Chain Wrap Capacity: 39t
  • Designed for ebike: Yes
  • Cage Length: Long
  • Rear Der/Shifter Compatibility: BOX Prime 9
  • Drivetrain Speeds: 9
  • Weight: 349g