Four Rear Derailleur - 8-Speed, Medium Cage, Black Rockhopper and you can start freely

and you can start freely

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

SPD compatible and X-Track Cleat compatible (sold separately)

3 raises the bar for performance through hilly and mountainous terrain

Four Rear Derailleur - 8-Speed, Medium Cage, Black Rockhopper and you can start freelyThe 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)