How to Adjust the Gears on a Mountain Bike: A Guide for Beginners
To adjust the gears on a mountain bike, first shift the chain to the smallest gear in the front and the largest gear in the back. Then, use the barrel adjuster near the shifter to fine-tune the shifting. If the chain is skipping or jumping, check the limit screws on the derailleur to make sure they are properly adjusted. Finally, check the cable tension and adjust it if necessary using the barrel adjuster. Repeat for each gear.