This number is the greatest amount of air pressure that should ever be put in the tire under normal driving conditions. It’s important that you understand that the stated maximum pressure means exactly that. Almost all vehicle manufactures recommend tire pressures less than the maximum stated on the tire because they are matching a pressure they believe best suits the tire on a particular vehicle. This will help insure that the tire’s load capacity, durability, traction and handling capabilities are maximized. To get the recommended pressure you will need to look on the vehicle placard. For vehicles produced between 1968 and 2003, the original tires size(s) and inflation pressures (including the spare) are listed on a vehicle placard (sometimes alternate pressures based on load and/or speed conditions are also provided).
Earlier placards can typically be found on:
• The driver-side door or doorjamb
• Rear passenger doorjamb of Ford sedans
• Fuel filler door
• Glove box or center console door
• The engine compartment