Four Rear Derailleur - 8-Speed, Medium Cage, Black Rockhopper Available in multiple colors the

Available in multiple colors the complete your desired bike aesthetics

and you can start freely

while the the bullhorn section offers an aero position for smoother roads and headwinds

We're not afraid to say it—our Airlock Presta Valve Tubes are the best performing

Four Rear Derailleur - 8-Speed, Medium Cage, Black Rockhopper Available in multiple colors theThe BOX Four Rear Derailleur is an affordable clutch based 1x8 speed derailleur that is both simple and lightweight. Engineered with BOX's "8 is Enough" drivetrain philosophy Limited Slip Clutch Bearing pulleys Nylon composite knuckle Direct channel cable stay Die cast linkages Stamped inner and outer cage Compatible with standard derailleur hanges (non direct mount)