Box One Prime 9 X-Wide Rear Derailleur Size:X-Wide Cage adding an extra tooth to

adding an extra tooth to each of the three highest gears

providing superior performance in any conditions

Including a Limited Slip Clutch

We start with Nickel plating which aids in corrosion resistance and then top it off with the "Diamond-Like Carbon" layer

Box One Prime 9 X-Wide Rear Derailleur Size:X-Wide Cage adding an extra tooth toThe Box One Prime 9 Rear Derailleur takes the advantages of our legacy 9 speed drive train but adds the advancements of a modern 1 by; a fully adjustable Tri Pack Clutch, and an x wide cage optimized for an 11 50T cassette. Forged construction steps up the durability and performance to an unparalleled level. Suited for the most demanding terrain. IMPORTANT NOTES Prime 9 Technology View Prime 9 Drivetrain Compatibility Manual How is the Ebike variant