BOX One Prime 9 X-Wide Rear Derailleur

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)