How to Tighten Chain on Mountain Bike: A Simple Guide for Beginners
To tighten the chain on a mountain bike, first shift the bike into the smallest chainring and smallest cog in the rear. Then, loosen the rear axle bolts and move the rear wheel forward in the dropouts until the chain is tight. Make sure the wheel is centered and straight before tightening the bolts back up. Finally, check the chain for proper tension by bouncing on the pedals to ensure it doesn’t come off the chainring or make noise while pedaling.