Light Truck or SUV:
* For on-road use, a tire pressure of 35-40 PSI (pounds per square inch) is typically recommended.
* For off-road use or heavy loads, the pressure can be increased to around 45 PSI.
Heavy-Duty Truck or Off-Road Vehicle:
* For on or off-road use, a tire pressure of 45-50 PSI is typically recommended.
* For extreme off-road conditions, the pressure can be increased even higher, up to 60 PSI or more.
It's always best to refer to the owner's manual or the specific tire manufacturer's recommendations for the optimal air pressure for your particular tires and vehicle.