BOX One Prime 9 Speed X-Wide Derailleur - 9 Speed Out of Stock These are compatible with all

These are compatible with all triple 104 BCD cranksets and mount in the “big ring” position

Designed to help eliminate hand fatigue

Choose from either 30

do not use this blade on aluminum

BOX One Prime 9 Speed X-Wide Derailleur - 9 Speed Out of Stock These are compatible with allBOX shook up the drivetrain market with the release of their wide range 9 speed drivetrains. The prime 9 derailleurs are built for 11 50t cassettes without all the headaches of adjusting 12 gears. The Box One Prime 9 rear derailleur is Box's top of the range Prime 9 offering with all the bells and whistles. It features an adjustable clutch, precision sealed bearing pulleys and a fully forged construction. Who's this item for: Anyone already running a