How to Change a Derailleur on a Mountain Bike: Beginner’s Guide
1. Shift the gears to the highest setting and release the derailleur cable from the pinch bolt. Remove the derailleur from the frame.
2. Measure and match the old derailleur to the new one, ensuring they have the same mounting interface.
3. Install the new derailleur onto the frame and adjust the derailleur hanger to ensure accurate shifting. Reattach the derailleur cable using the pinch bolt.
4. Check the shifting performance by running through all gears. Make necessary adjustments to cable tension and limit screws until optimal shifting is achieved.
5. Finally, test ride and fine-tune as necessary.