Ford 1996 Windstar Manual page 331

Because your vehicle's tires may wear unevenly, you may need
to replace them before a wear band appears across the entire
tread. Some spots wear more heavily than others.
When replacing full size tires, never mix radial,
bias-belted, or bias-type tires. Use only the tire sizes that
are listed on the tire pressure decal. Make sure that all
tires are the same size, speed rating, and load-carrying
capacity. Use only the tire combinations recommended on
the decal. If you do not follow these precautions, your
vehicle may not drive properly and safely.
Make sure that all replacement tires are of the same size,
type, load-carrying capacity, and tread design (e.g. "All
Terrain", etc.), as originally offered by Ford.
Do not replace your tires with "high performance" tires
or larger size tires.
Use of aftermarket wheel assemblies may damage your
vehicle or cause accidents resulting in serious injuries.
Failure to follow these precautions may adversely affect
the handling of the vehicle and make it easier to lose
control and roll over.
Servicing Your Windstar
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