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Engineered with advanced bonding technology
The robust stainless steel platform ensures stability and longevity
The double-butted design optimizes the spoke's strength-to-weight ratio
ensuring smooth operation and long-lasting performance under diverse riding conditions
Box Four Prime 9 Rear Derailleur - 8-Speed, Wide Cage, Black Rotor Size_No Result Engineered with advanced bonding technologyUpgrade 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
