2003 Ford Expedition Owner Guide 5th Printing - Page 318

Maintenance and Specifications The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either separately or in combination, can cause heat buildup and possible tire failure. SERVICING YOUR TIRES Checking the tire pressure • Use an accurate tire pressure gauge. • Check the tire pressure when tires are cold, after the vehicle has been parked for at least 3 hours or has been driven less than 5 km (3 miles). As you drive, the temperature in the tire warms up, increasing the tire pressure. • Adjust tire pressure to recommended specifications found on the Certification Label. Tire pressure information can also be found on the Tire Information label located on the inside of the fuel filler door. • Check tires for proper air pressure monthly. Check spare tire for proper air pressure every six months. Check that the externally mounted spare tire is tight. Refer to Stowing the flat/spare tire of the tire changing section in the Roadside Emergencies chapter Improperly inflated tires can affect vehicle handling and can fail suddenly, possibly resulting in loss of vehicle control, vehicle rollover and/or personal injury. Tire rotation Because your vehicle's tires perform different jobs, they often wear differently. To make sure your tires wear evenly and last longer, rotate them as indicated in the scheduled maintenance guide. If you notice that the tires wear unevenly, have them checked. 318