User Guide

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If winter tires are to be applied to the front axle of any
vehicle, they must also be applied to the rear axle for safe
operation. This applies to all passenger cars and light trucks,
including front wheel drive, 4x4, and all-wheel-drive vehicles.
•
If winter tires are to be applied to the rear axle of any
vehicle, it is recommended that they also be installed on
the front axle.
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It is generally acceptable to apply a tire with a lower speed
rating than your original tires for use in winter weather
conditions; however, speed should be reduced accordingly.
All winter tires should be the same speed rating. See “Tire
Speed Ratings” in this manual.
•
Winter tires used in warm weather conditions may wear
more rapidly.
•
Studded winter tires follow the same recommendations as
above; consult a qualied tire service professional for infor-
mation regarding any seasonal restrictions.
HIGH SPEED DRIVING
SAFETY WARNING
Driving at high speed is dangerous and can cause an
accident, resulting in serious personal injury or death.
•
Regardless of the speed and handling capabilities of
your car and its tires, a loss of vehicle control can result
from exceeding the maximum speed allowed by law or
warranted by trafc, weather, vehicle, or road conditions.
•
High-speed driving should be left to trained professionals
operating under controlled conditions.
•
No tire, regardless of its design or speed rating, has unlimit-
ed capacity for speed, and a sudden tire failure can occur if
its limits are exceeded. See “Tire Speed Ratings,” the next
section in this manual.
Refer to your vehicle owner’s manual for any tire pressure
recommendations for high speed driving.
TIRE SPEED RATINGS
A tire bearing a letter “speed rating” designation indicates the
tire’s speed capability according to standardized laboratory
tests. This speed rating system is intended to permit compar-
ison of the speed capabilities of different tires. When replac-
ing your tires, consult your vehicle owner’s manual and tire
information placard for recommendations, if any, concerning
the use of speed rated tires.
•
To avoid reducing the speed capability of the vehicle, replace
a speed rated tire only with another tire having at least the
same speed rating. It is the “top speed” of the “slowest” tire
on the vehicle which limits the vehicle’s top speed without
tire failure.
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