Servicing The Tires; Checking The Tire Pressure - Ford F150 1997 Owner's Manual

Maintenance and care
controlled conditions on a
specified indoor laboratory test
wheel. Sustained high temperature
can cause the material of the tire
to degenerate and reduce tire life,
and excessive temperature can
lead to sudden tire failure. The
grade C corresponds to a level of
performance which all passenger
car tires must meet under the
Federal Motor Vehicle Safety
Standard No. 109. Grades B and A
represent higher levels of
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.

Servicing the tires

Checking the tire pressure

Check the tire pressure at least
once a month or after rotating
tires and inflate tires as necessary.
Tire pressure is most accurate
when tires are cold (after vehicle
has been parked for at least one
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