Box Four 8 Speed Wide Rear Derailleur Color:Black Box Four 8-Speed 12-42T E-Bike

Box Four 8-Speed 12-42T E-Bike Cassette

Box Three Prime 9 12-46T E-Bike Cassette

There are also the "Compact" variations that are fitted out with upright shift levers

derailleur

Box Four 8 Speed Single Shift Shifter

Box Four 8 Speed Wide Rear Derailleur Color:Black Box Four 8-Speed 12-42T E-BikeThe 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