One Prime 9 X-Wide Rear Derailleur - 9-Speed, Long Cage, Black

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
• Forged inner and outer cage
• Compatible with standard derailleur hangers (non-direct mount)