Box Four Prime 9 Rear Derailleur - 8-Speed, Wide Cage, Black Rotor Size_No Result Fitted with a 180 bearing

Fitted with a 180 bearing model

The double-butted design optimizes the spoke's strength-to-weight ratio

and minimizes downtime on rugged off-road adventures

The robust stainless steel platform ensures stability and longevity

the Delta HexAir Saddle Cover elevates your cycling experience with revolutionary support technology

Box Four Prime 9 Rear Derailleur - 8-Speed, Wide Cage, Black Rotor Size_No Result Fitted with a 180 bearingUpgrade your bike's drivetrain with the BOX Four Rear Derailleur an 8 speed, medium cage derailleur designed for superior performance, durability, and precision shifting. Engineered with advanced Prime 9 technology, this derailleur delivers less derailleur travel and a refined chainline for smoother gear changes, increased lifespan, and enhanced efficiency on every ride. Constructed with high quality materials such as forged inner and outer cages, die