Uniform Tire Quality Grading; Vehicle Care; Uniform Tire Quality- Page 285

2017 Buick enclave Owner Manual

Model Year
2014 Dodge Charger SRT Owner Manual

Table of Contents

In Brief
Seats and Restraints
Instruments and Controls
Driving and Operating
Vehicle Care
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Buick Enclave Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-

9955666) - 2017 - crc - 8/4/16

284

Vehicle Care

control, electronic stability control,
or All-Wheel Drive, the performance
of these systems can also be
affected.

{

Warning

If different sized wheels are used,
there may not be an acceptable
level of performance and safety if
tires not recommended for those
wheels are selected. This
increases the chance of a crash
and serious injury. Only use GM
specific wheel and tire systems
developed for the vehicle, and
have them properly installed by a
GM certified technician.

See

Buying New Tires

0

282

and

Accessories and
Modifications

0

237

.

Uniform Tire Quality
Grading

The following information relates
to the system developed by the
United States National Highway
Traffic Safety Administration
(NHTSA), which grades tires by
treadwear, traction, and
temperature performance. This
applies only to vehicles sold in
the United States. The grades
are molded on the sidewalls of
most passenger car tires. The
Uniform Tire Quality Grading
(UTQG) system does not apply
to deep tread, winter tires,
compact spare tires, tires with
nominal rim diameters of
10 to 12 inches (25 to 30 cm),
or to some limited-production
tires.

While the tires available on
General Motors passenger cars
and light trucks may vary with
respect to these grades, they
must also conform to federal
safety requirements and

additional General Motors Tire
Performance Criteria (TPC)
standards.

Quality grades can be found
where applicable on the tire
sidewall between tread shoulder
and maximum section width. For
example:

Treadwear 200 Traction AA
Temperature A

All Passenger Car 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 (1½) times as well on
the government course as a tire
graded 100. The relative
performance of tires depends