1996 Oldsmobile Bravada Owner's Manual - Page 253

1996 Oldsmobile Bravada Manual

Page 253 highlights

I Mixing tires couldcause you to lose control while driving. If you mix tires of different sizes or types (radial and bias-belted tires), the vehicle may not handle properly, and you could have a crash. Using tires of different sizes may also cause damage to your vehicle.Be sure to use the same size and type tires on all wheels. 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. Uniform Tire Quality Grading 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 (25 to 30 cm), or to some limited-production tires. Treadwear The treadwear grade is a comparativerating 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 1/2) 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 -- A, B, C The traction grades, from highest to lowest, areA, B, and C, and they 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 braking (straightahead) traction tests and does not include cornering (turning) traction. 6-41

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I
Mixing
tires
could cause you
to
lose
control
while
driving.
If
you
mix
tires
of
different
sizes
or types
(radial
and
bias-belted
tires),
the
vehicle
may
not
handle
properly,
and
you
could
have
a
crash.
Using
tires
of
different
sizes
may
also cause
damage to your
vehicle.Be sure to use
the
same
size and type
tires
on
all
wheels.
Uniform
Tire
Quality
Grading
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 (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.
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
1/2) 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
--
A,
B,
C
The traction
grades,
from
highest
to
lowest,
are
A,
B,
and
C,
and
they
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 braking (straightahead) traction tests and does not
include cornering (turning) traction.
6-41