Jeep Grand Cherokee, Operating Information Manual

Page: 191 / 315

TIRES — GENERAL INFORMATION
Tire Pressure
Proper tire inflation pressure is essential to the
safe and satisfactory operation of your vehicle.
Three primary areas are affected by improper
tire pressure:
Safety
WARNING!
•
Improperly inflated tires are dangerous and
can cause collisions.
•
Under-inflation increases tire flexing and
can result in over-heating and tire failure.
•
Over-inflation reduces a tire’s ability to
cushion shock. Objects on the road and
chuckholes can cause damage that result
in tire failure.
•
Unequal tire pressures can cause steering
problems. You could lose control of your
vehicle.
(Continued)
WARNING! (Continued)
•
Over-inflated or under-inflated tires can af-
fect vehicle handling and can fail suddenly,
resulting in loss of vehicle control.
•
Unequal tire pressures from one side of the
vehicle to the other can cause the vehicle
to drift to the right or left.
•
Always drive with each tire inflated to the
recommended cold tire inflation pressure.
Economy
Improper inflation pressures can cause uneven
wear patterns to develop across the tire tread.
These abnormal wear patterns will reduce
tread life resulting in a need for earlier tire
replacement. Under-inflation also increases tire
rolling resistance and results in higher fuel
consumption.
Ride Comfort and Vehicle Stability
Proper tire inflation contributes to a comfortable
ride. Over-inflation produces a jarring and un-
comfortable ride. Both under-inflation and over-
inflation affect the stability of the vehicle and
can produce a feeling of sluggish response or
over responsiveness in the steering.
Unequal tire pressures can cause erratic and
unpredictable steering response.
Unequal tire pressure from side to side may
cause the vehicle to drift left or right.
Tire Inflation Pressures
The proper cold tire inflation pressure is listed
on the driver’s side “B” Pillar.
The pressure should be checked and adjusted,
as well as inspected for signs of tire wear or
visible damage, at least once a month. Use a
good quality pocket-type gauge to check tire
pressure. Do not make a visual judgement
when determining proper inflation. Radial tires
may look properly inflated even when they are
under-inflated.
CAUTION!
After inspecting or adjusting the tire pressure,
always reinstall the valve stem cap. This will
prevent moisture and dirt from entering the
valve stem, which could damage it.
Inflation pressures specified on the placard are
always cold tire inflation pressure. Cold tire
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