what is average tire pressure
Pump It Up. Proper tire pressure lets your bike roll quickly, ride smoothly, and fend off flats. Narrow tires need more air pressure than wide ones: Road tires typically require 80 to 130 psi (pounds per square inch); mountain tires, 30 to 50 psi; and hybrid tires, 50 to 70 psi. To find your ideal pressure, start in the middle of these ranges, then factor in your body weight.