Ford Mercury Villager 1997 Owner's Manual page 309

The temperature grade for this tire is established for a tire
that is properly inflated and not overloaded. Excessive
speed, underinflation, or excessive loading, either
separately or in combination, can cause heat buidlup and
possible tire failure.
The information on braking performance and tire quality grading
found in the "Ford Motor Company Passenger Car Consumer
Information" pamphlet (FPS 12024-92) also applies to the Villager.
This publication is available from your dealer.
Snow Tires and Cables
The tires on your vehicle have all-weather treads that provide
traction in rain or snow. However, during the winter months in
some climates, you may need to use snow tires and
occasionally cables for your tires.
When using snow tires, make sure they are the same size
and grade as the tires you normally use on your
vehicle.
Do not use cables when using a temporary spare. For full size
tires, use cables on the tires only in an emergency or if the law
requires them where you drive. When you use the tire cables:
Make sure the cables are the right size for your tires. Use only
SAE Class "S" cables. Other types may damage your vehicle.
Put cables on tightly with the ends held down securely. Follow
the cable manufacturer's instructions.
Maintenance and Care
WARNING
WARNING
305