Jack it up and slowly spin it and inspect tire and wheel. Then spin and listen. Any noise means bearing is probably bad. Grab the tire on each side and quickly push with one hand pull with the other. A very small amount of movement is OK, but a quarter inch movement is not good.
A quick check should be part of every pre trip inspection, along with air pressure.
Balancing is a wise thing to do, it will make the tires last a little longer and pull much better.
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