How to Fix My Mountain Bike Gears: A Beginner’s Guide to Bike Maintenance
To fix your mountain bike gears, first, lift the back wheel and spin the pedals to determine if the gears are properly aligned. If not, adjust the barrel adjusters on the derailleur until the gears run smoothly. Check the shift cable and housing for damage and replace if necessary. If the bike is still not shifting properly, replace the cassette, chain, or front chainring. Finally, lubricate the chain and test ride the bike to ensure all gears are functioning correctly.