Acceptable dirt bike tire air pressures range from a low five psi, up to 20 psi, and even 30 psi for dual purpose bikes on paved roads ridden at high speed. Read more: The 15 Most Reliable SUVs Of All ...
Ambient air temperature affects your tire pressure: the hotter the weather, the higher your psi climbs. But according to Firestone, you're usually safe if you check your psi right before driving.