Details
The 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.
Part Numbers
| Option | UPC | MPN |
|---|---|---|
| Short Cage / Black / 8-speed | 639266097402 | BX-DR4-08AWC-BK |
