How to Fix Your Mountain Bike Gears in Easy Steps
To fix a mountain bike gears, start by cleaning the drivetrain components thoroughly with a degreaser. Check the derailleur alignment by shifting through the gears and adjust it if needed with the barrel adjuster. Next, adjust the cable tension if the gears are still skipping or not shifting properly. If the chain is worn or damaged, replace it. Finally, if the cassette or chainrings are worn, replace them as well.