Box Four 8 Speed Wide Rear Derailleur Color:Black Lockring & Cogs replacement for

Lockring & Cogs replacement for Box Two Prime 9 EBIKE cassettes

providing superior performance in any conditions

and SRAM setups

and chain paired to the durable Box Two cassette

derailleur

Box Four 8 Speed Wide Rear Derailleur Color:Black Lockring & Cogs replacement forThe 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