How to Easily Install a Derailleur on Your Mountain Bike: A Step-by-Step Guide
To install a derailleur on a mountain bike, first remove the old derailleur and shift cable. Mount the new derailleur onto the derailleur hanger and install the shift cable. Adjust the limit screws to ensure the derailleur doesn’t shift beyond the smallest or largest gears. Then, adjust the indexing by shifting through the gears and fine-tuning the cable tension until the shifting is smooth and accurate. Finally, test ride the bike to verify the derailleur is shifting properly under load.