Ford 1998 Windstar Owner's Manual page 247

If you use the temporary spare tire continuously or do
not follow these precautions, the tire could fail, causing
you to lose control of the vehicle, possibly injuring
yourself or others.
When you drive with the temporary spare tire, DO NOT:
exceed 50 mph (80 km/h) under any circumstances
load your vehicle so that it is heavier than the maximum
vehicle load rating listed on the tire decal
tow a trailer
use tire chains
try to repair the temporary spare tire or remove it from its
wheel
use the wheel for any other type of vehicle
drive through an automatic car wash. Because the temporary
spare tire is smaller than a conventional tire, it reduces the
ground clearance. Your vehicle may get caught in the rails
and it could be damaged.
Finding the spare tire
The spare tire is stored underneath your vehicle, directly below
the cargo area.
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