BOX Prime 9 Rear Derailleur BB Shell Width (mm)-70 Marathon E-Plus tires are refined

Marathon E-Plus tires are refined for the special demands of an E-Bike keeping safety and durability at the top of the list

Exceptional value for tubeless ready 35mm inner rim width mountain wheels

Reliable in every condition

210 & 240mm posts have an additional bushing)

BOX Prime 9 Rear Derailleur BB Shell Width (mm)-70 Marathon E-Plus tires are refinedPrime 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 linkages Box Three features: Limited Slip Clutch, stamped