How old are the tires? The amount of tread is not a good indication of tire condition. ANY TIRE of 7 years old should be looked at as a blowout waiting to happen. This can cause thousands of dollars in damage (first hand experience) and ruin your trip.
The problem with RV's is the tires sit in the sun baking . This lessens their life dramatically.
AGAIN I SAY they can look great but be a blowout waiting to happen. They are unlike automobile tires in that they give out before they wear out.
Buy new tires all around and save 2 old for spares. They do not need to be mounted. Buy a road service plan and then have at her.
