How to Calibrate Your Mountain Bike Gears for Optimal Performance
To calibrate mountain bike gears, start by shifting your bike into the smallest chainring and smallest cog. Turn the barrel adjuster on your derailleur counterclockwise until the chain is rubbing against the derailleur. Then, turn the barrel adjuster slowly clockwise until the chain runs smoothly and quietly on the smallest cog. Move through each gear adjustment in the same way, making sure that the chain shifts smoothly and quietly between them. Finally, fine-tune your adjustments by test riding your bike and making any necessary adjustments until your bike shifts perfectly.