Box Four 8 Speed Wide Rear Derailleur Size:Wide Cage and low rolling resistance in

and low rolling resistance in the straights

you can also use your custom number plate sticker so you can always find your bike stand in the pits

Including a Limited Slip Clutch

The Mid reach lever features a new design that puts it in the same reach position as the Long

Box One™ Chain Tensioners are extruded then CNC-machined from 7075 aluminum for an optimal balance of strength and weight

Box Four 8 Speed Wide Rear Derailleur Size:Wide Cage and low rolling resistance inThe Box Four Rear Derailleur is the base of Prime 9 Technology that offers an affordable clutch based 1 by 8 speed derailleur that is simple and light; this makes it a perfect candidate for every entry level bike that traditionally has a 3 by drive train that is neither durable nor user friendly. SUPPORT MATERIAL Prime 9 Technology View Prime 9 Drivetrain Compatibility Manual How is the Ebike variant different? View Prime 9 Comparison Chart View Prime