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Because your vehicle is not
equipped with a spare tire, you cannot
do a tire rotation safely with the jack
that may come with your vehicle if so
equipped. Contact an authorized
dealer for tire rotation.
Also, inspect them for uneven wear and
damage. Abnormal wear is usually
caused by one or a combination of the
following:
Incorrect tire pressure
Improper wheel alignment
Out-of-balance wheel
Severe braking
After rotation, inflate all tire pressures to
specification and inspect the wheel nuts
for tightness.
With Tire Pressure Monitor System
(TPMS)
The TPM system must be initialized
after adjusting the tire pressure, to
make the system operate normally.
Refer to “Tire Pressure Monitoring
System” in “Safety” for further
information.
Rotate unidirectional tires and radial
tires that have an asymmetrical tread
pattern only from front to rear, not from
side to side. Tire performance will be
reduced if rotated from side to side.
DEPARTMENT OF
TRANSPORTATION
UNIFORM TIRE
QUALITY GRADES
The following tire grading
categories were established by the
National Highway Traffic Safety
Administration. The specific grade
rating assigned by the tire's
manufacturer in each category is
shown on the sidewall of the tires
on your vehicle.
All passenger vehicle tires must
conform to Federal safety
requirements in addition to these
grades.
Treadwear
The Treadwear grade is a
comparative rating, based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test course.
For example, a tire graded
150 would wear one and one-half
times as well on the government
course as a tire graded 100. The
relative performance of tires
depends upon the actual
conditions of their use, however,
and may depart significantly from
the norm due to variations in driving
habits, service practices, and
differences in road characteristics
and climate.
Traction Grades
The Traction grades, from highest
to lowest, are AA, A, B, and C.
These grades represent the tire's
ability to stop on wet pavement, as
measured under controlled
conditions on specified gover nment
test surfaces of asphalt and
concrete. A tire marked C may
have poor traction performance.
Warning!
The traction grade assigned to
this tire is based on straight-ahead
braking traction tests, and does
not include acceleration,
cornering, hydroplaning, or peak
traction characteristics.
Temperature Grades
The Temperature grades are A (the
highest), B, and C, representing the
tire's resistance to the generation of
heat and its ability to dissipate heat,
252
SERVICING AND MAINTENANCE
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