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Always follow the recommended tire
inflation pressure ( page 371) for proper
tire inflation.
Warning!
Never exceed the max. tire inflation
pressure. 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 over-
heated.
Do not overinflate tires. Overinflated tires
can adversely affect handling and ride com-
fort, wear unevenly, increase stopping dis-
tance, and result in sudden deflation
(blowout) because they are more likely to
become punctured or damaged by road de-
bris, potholes etc.
Uniform Tire Quality Grading Standards
(U.S. vehicles)
Tire manufacturers are required to grade
tires based on three performance
G
factors: treadwear, traction and
temperature resistance.
1 Treadwear
2 Traction
3 Temperature resistance
i
For illustration purposes only. Actual data
on tires are specific to each vehicle and may vary
from data shown in above illustration.
Tires and wheels
Quality grades can be found, where
applicable, on the tire sidewall between
tread shoulder and maximum section
width. For example:
Treadwear Traction Temperature
200
AA
A
All passenger car tires must conform to
federal safety requirements in addition to
these grades.
Operation
391
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