2004 Cadillac SRX 3.6L 4.6L Owners Manual

Uniform Tire Quality Grading
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
a half (1.5) 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.
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
The following information relates to  the system
developed by the United States  National Highway
Traffic Safety Administration,  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
system does not apply to  deep tread, winter-type
snow tires, space-saver or temporary  use spare tires,
tires with nominal rim diameters  of 10 to 12 inches
Traction – AA, A, B,  C
The traction grades, from highest  to lowest, are AA, A,
B, and C. Those grades  represent the tire’s ability
to stop on wet pavement  as measured under controlled
conditions on specified government 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.
(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.
5-74
Product Specification
CategoriesCadillac Manuals, Cadillac SRX Manuals
Tags,
Model Year2004
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