How to Install Rear Derailleur on Your Mountain Bike: A Beginner’s Guide
To install a rear derailleur on a mountain bike, first, attach the derailleur hanger to the frame, by screwing it on with a 5mm Allen wrench. Then, slide the derailleur onto the hanger, lining up the bolt holes. Secure the derailleur in place with the bolt and a 5mm Allen wrench. Next, attach the derailleur cable, threading it through the derailleur and the cable housing. Finally, adjust the derailleur limits and tension using the barrel adjuster and the limit screws until the shifting is smooth and accurate.