The Box One Prime 9 Rear Derailleur takes the advantage of BOX's legacy 9-speed drivetrain but adds the advancements of a modern 1x; a fully adjustable Tri-Pack(TM) Clutch, and an x-wide cage optimized for an 11-50T cassette. Forged construction steps up the durability and performance to an unparalleled level. Suited for the most demanding terrain.
- Designed for aggressive terrain
- Adjustable Tri-Pack™ Limited Slip clutch
- Precision sealed bearing pulleys
- Carbon-nylong composite knuckle
- Pivot-Tech™ cable stay
- Durable 3D forged linkages
- Color: Black
- Largest Cog: 50
- Rear Derailleur Mount Type: 10x1 Standard
- Chain Wrap Capacity (teeth): 39
- Cage Length: Long
- Designed for ebike: Yes
- Rear Der/Shifter Compatibility: BOX Prime 9
- Drivetrain Speeds: 9
