Tire mixing can be dangerous.
Most passenger tires today are radial tires. For best performance, we
recommend the same size & type of tire be used on all four wheel positions
unless the vehicle manufacturer specified different sizes, front & rear, as
original equipment. Check the vehicle placard. If only two radials are mounted
with two non-radials, the radials should be mounted on the rear. If tires of
different types are mixed on a vehicle in any configuration, they should not be
used for long periods & speeds should be kept to a minimum.
Mixing or matching of tires on four-wheel drive vehicles requires special
precautions. Always check vehicle manufacturers' manual for their
recommendations.