PART 8: MAINTENANCE AND SERVICE TIRES, WHEELS, AND RIMS
(R05/10) Y53-6032 – 179 –
Overloaded tires
Overloading your truck is as damaging to your tires as
underinflation. The following chart shows how neglect or
deliberate abuse can affect the life of your tires.
WARNING!
Do not exceed the load rating of
your tires (molded on the side wall of your tire)
or the maximum vehicle load rating, whichever
is less. Overloading could result in premature
tire failure causing you to loose control of your
vehicle and result in an accident causing death
or personal injury. The maximum vehicle load
rating (GVWR) is found on the Tire and Rim Data
label on the driver's door.
Overinflated tires
Too much air pressure reduces the tire tread contact area
and results in rapid wear in the center of the tread.
WARNING!
Overinflated tires can cause acci-
dents. They wear more quickly than properly
inflated tires and are more subject to punctures,
cracks, and other damage. They could fail and
cause you to lose control of your vehicle result-
ing in an accident causing death or personal
injury. Be sure all tires are inflated correctly
according to the manufacturer's recommenda-
tions.
The chart on page 182 gives you the right load and infla-
tion rates for different tire sizes. Please follow it for the saf-
est and most economical use of your tires. (Consult the
tire manufacturer for proper pressure settings with tires
not listed in this table.)
Matching tires
Be sure to buy matched tires for your vehicle, especially
on the rear axles. Mismatched tires can cause stress
between axles and cause the temperature of your axle
lubricant to get too hot. Matched tires will help your drive-
line last longer and will give you better tire mileage.
Table 11 Effect of Load Pressure on Tire Life
Vehicle
Load
Normal 20%
Over
40%
Over
60%
Over
80%
Over
100%
Over
Tire Pres-
sure
Normal 20%
Low
30%
Low
35%
Low
45%
Low
55%
Low
Expected
Total Tire
Mileage
Normal 70% 50% 40% 30% 25%
Y53-6032.book Page 179 Monday, May 24, 2010 3:37 PM
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