FORD 2003 Explorer v.2 - Manual (Page 257)

Replacing tires
Replace the tires when the wear
band is visible. Due to exposure to
the elements and exhaust you
should replace the spare tire when
you replace the other tires.
Never mix radial bias-belted tires, or bias-type tires. Use only the
tire sizes that are listed on the Certification Label. Make sure
that all tires are the same size, speed rating, and load carrying
capacity. Use only the tire combinations recommended on the label. If
you do not follow these precautions, your vehicle handling may be
effected which can lead to loss of vehicle control, vehicle rollover
and/or personal injury.
Make sure that all replacement tires are of the same size, type,
load-carrying capacity and tread design as originally offered by
Ford.
Do not replace your tires with “high performance” tires or larger
size tires.
Failure to follow these precautions, your vehicle handling may be
adversely effected which can lead to loss of vehicle control,
vehicle rollover and/or personal injury.
Tires that are larger or smaller than your vehicle’s original tires may
affect the accuracy of your speedometer.
Maintenance and Specifications
257