Tire inflation pressure
291
Technical data
Observe the information on recommended
tire inflation pressure in the "Operation"
section (e page 174).
The following table lists the recommended
cold tire inflation pressures for all load
conditions up to the maximum permissible
weight limits (GAWR). The tire inflation
pressures listed apply to the tires installed
as original equipment.
i In addition to the following table, the recom-
mended cold tire inflation pressures are listed on
a label located on the driver's door B-pillar
(e page 295).
Set the correct tire pressure before load-
ing the vehicle. If the vehicle has been
loaded, check the tire pressures and cor-
rect them if necessary.
The tires can be considered cold if the ve-
hicle has been parked for at least 3 hours
or driven less than 1 mile (1.6 km) at an
ambient temperature of approximately
68 °F (20 °C).
Keeping the tires properly inflated pro-
vides the best handling, tread life and ride
comfort.
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 inflation pressures more often if
subject to a wide range of outdoor temper-
atures, as tire inflation pressures vary with
temperature changes.
! The pressure difference between the tires
on a single axle should not exceed 1.5 psi
(0.1 bar).
Tire pressures of less than 43.6 psi (3.0 bar) are
not permissible.
Summer tires – –
All-season tires
1
LT 245/75 R16 120/116N LT 215/85 R16 115/112N
LT 215/85 R16 115/112Q
Winter tires
1
LT 245/75 R16 120/116N
M+S .
LT 215/85 R16 115/112N
M+S .
1. Radial-ply tires
Vehicle model type 2500 3500
Tire inflation pressure
G Warning
Follow recommended tire inflation pressures.
Do not underinflate tires. Underinflated tires
wear excessively and/or unevenly, adversely
affect handling and fuel economy, and are
more likely to fail from being overheated.
Do not overinflate tires. Overinflated tires can
adversely affect handling and ride comfort,
wear unevenly, increase stopping distance,
and result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured or damaged by road debris, potholes,
etc.
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