Replacing The Tires; A Worn-Out Tire - Ford Ranger Owner's Manual

Replacing the Tires

Replace any tires that show wear bands. When your tire shows
a wear band, it has only 1/16 inch (2 mm) of tread left.

A worn-out tire

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.
Your wheels and tires are match-mounted for improved ride.
Before you begin to repair a tire, mark the wheel and tire so
that they are properly aligned when remounted. This will
ensure that the tires will continue to give you the same ride
level.
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.
Servicing Your Ranger
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