2. 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 consump-
tion.
3. Ride Comfort and Vehicle Stability—
Proper tire inflation contributes to a comfortable ride.
Over inflation produces a jarring and uncomfortable 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 unpredict-
able steering response.
Unequal tire pressure from side to side may cause the
vehicle to drift left or right.
Tire Inflation Pressures
The proper tire pressure for your vehicle is listed on a
label attached to the rear face of the driver’s door. The
pressure should be checked and adjusted at least once
every month. Check more often if subject to a wide range
of outdoor temperatures, as tire pressures vary with
temperature changes.
Inflation pressures specified on the label are always “cold
inflation pressure”. Cold inflation pressure is defined as
the tire pressure after the vehicle has not been driven for
at least 3 hours, or driven less than a mile after a 3 hour
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