Ford 2001 Mercury Cougar Owner's Manual page 237

Maintenance and care
Do not replace your tires
with high performance"
tires or larger size tires.
Failure to follow these
precautions may adversely
affect the handling of the vehicle
and make it easier for the driver
to lose control and roll over.
Dispose of worn tires in
accordance with local
environmental regulations.
Refer to the tire instruction decal
to determine the specific size tire
and wheel Ford Motor Company
recommends for use on this
vehicle.
When purchasing replacement tires
for your vehicle, consult your
dealer or a qualified service
technician to ensure that the
correct tire type is used.