BOX One Prime 9 Derailleur(9spd), X-Wide Cage - Black Torque Tools anti-drag and anti-squeal and Easy

anti-drag and anti-squeal and Easy Pad Replacement (EPR) technology

Hex keys: 2/2

128672-Q0-L

micro-adjustable head

BOX One Prime 9 Derailleur(9spd), X-Wide Cage - Black Torque Tools anti-drag and anti-squeal and EasyPrime 9 Technology for less derailleur travel and better chainline, less wear, and improved lifespan Box One features: Adjustable Tri Pack limited slip clutch, forged inner and outer cage, Pivot Tech cable stay, sealed bearing pulleys, and 3D forged linkages Box Two features: Tri Pack limited slip clutch, forged inner and outer cage, Pivot Tech cable stay, sealed bushing pulleys, and 3D forged inkages Box Three features: Limited Slip Clutch, stamped