- 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
- Perfect candidate for every entry-level bike that traditionally has a 3 by drive-train that is neither durable nor user friendly
- For those seeking an affordable way into the world of 1x drivetrains on an otherwise entry level platform
- Features Box's Limited Slip Clutch, durable nylon composite knuckle and direct channel cable stay
- Die cast linkage with stamped inner and outer cage
- *Compatible with Box Four Prime 9 drivetrain only - Not compatible with other 8 speed drivetrains
- DER BOX RR FOUR PRIME 9 8s X-WIDE BK
Speed: 8sp
Max: 42
Color: BLK
Compatibility: Box
Type: Mechanical
