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Operation
Tires and wheels
4
The placard lists the recommended cold
tire inflation pressures for all load conditi-
ons up to the maximum permissible weight
limits (GAWR). The tire inflation pressures
listed apply to the tires installed as original
equipment.
Important notes on tire inflation pres-
sure
Tire temperature and tire inflation pressure
are also increased while driving, depending
on the driving speed and the tire load.
Tire inflation pressure changes by approxi-
mately 1.5 psi (0.1 bar) per 18 °F (10 °C)
of air temperature change. Keep this in
mind when checking tire inflation pressure
where the temperature is different from
the outside temperature.
For example:
If the inside temperature is 68 °F (20 °C)
and the outside temperature is 32 °F
(0 °C) then the cold tire inflation pressure
should be increased by 3 psi (0.2 bar),
which equals 1.5 psi (0.1 bar) for every
18 °F (10 °C) for this outside temperature
condition.
Check tire pressures more often if subject
to a wide range of outdoor temperatures,
as tire pressures vary with temperature
changes.
Warning G
If the tire inflation pressure repeatedly
drops:
ț Check the tires for punctures from for-
eign objects.
ț Check to see whether air is leaking from
the valves or from around the rim.
Warning G
Tire pressure may increase during opera-
tion.
Never reduce this normal pressure build up
or your tire pressure will be too low.
Underinflated tires wear excessively and/or
unevenly, adversely affect handling and fuel
economy, and are more likely to fail from be-
ing overheated.