1997 Ford Expedition Owner's Manual - Page 183

Maintenance and care performance on the laboratory test wheel than the minimum required by law. 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. Checking the tire pressure Check the tire pressure periodically and inflate tires as necessary. To check the tire pressure, insert the tire pressure gauge into the valve system. The cold pressure amount is listed on the Safety Compliance Certification label. Improperly inflated tires can affect vehicle handling and can fail suddenly, possibly resulting in loss of vehicle control. Rotating the tires Rotate your tires at regular intervals for even wear. Rotation intervals are listed in the "Service Guide". 184