traction control Mercury Sable 1997 Owner's Manuals

one and one-half (1 1/2) times as well on the
government course as a tire grade 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 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.
Temperature A B C
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
when tested under controlled conditions on a
specified indoor laboratory test wheel. Sustained
high temperature can cause the material of the tire
to degenerate and reduce tire life, and excessive
temperature can lead to sudden tire failure. The
grade C corresponds to a level of performance which
all passenger car tires must meet under the Federal
Motor Vehicle Safety Standard No. 109. Grades B
and A represent higher levels of performance on the
laboratory test wheel than the minimum required by
law.
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Maintenance and care
131

Replacing the tires
Replace the tires when
the wear band is
visible through the tire
treads.
Failure to follow these precautions may
adversely affect the handling of the vehicle
and make it easier to lose control and roll over.
Tires that are larger or smaller than your vehicle's
original tires may also affect the accuracy of your
speedometer.
SNOW TIRES AND CHAINS
The tires on your vehicle have all weather treads to
provide traction in rain and snow. However, in some
climates, you may need to use snow tires and
chains. Follow these guidelines when using snow
tires and chains:
²Use only SAE Class S chains.
²Install chains securely, verifying that the chains do
not touch any wiring, brake lines or fuel lines.
²Drive cautiously. If you hear the chains rub or
bang against your vehicle, stop and re-tighten the
chains. If this does not work, remove the chains
to prevent damage to your vehicle.
²If possible, avoid fully loading your vehicle.
²Do not use tire chains on aluminum wheels.
²Do not use tire chains if your vehicle is equipped
with P225/55VR16 tires.
²Remove the tire chains when they are no longer
needed. Do not use tire chains on dry roads.
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Maintenance and care
133