Box Four 8 Speed Wide Rear Derailleur
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.
Q: Can I install this on my bike that uses a b-link for my current derailleur?
A: Yes! All you need to do is remove your old derailleur and the b-link leaving the standard hanger attached to your bike frame. You can now mount your Box Components derailleur directly to the hanger on your frame.
Q: Can I install this on my bike that currently has a direct mount hanger?
A: Possibly, you will need to see if your frame manufacturer or a third party like wheelsMFG offers a standard mount hanger for your frame.
Shifts like a dream
Running this on a 11-28t cassette and it works perfectly. Shifts great under load too.
Absolutely OUTSTANDING Product!
Im over-joyous about my purchase of this great Mech! My drive train has literally never rolled better or as quiet! Its a perfect combination for a 1x8 Drive train setup, Currently running this plus the matching shifter on my Downhill Bike! Zero issues and PERFECT SHIFTING! I HIGHLY recommend this for all your 1x8 needs!