LT tires are rated on a tougher scale than either ST rated tires or P rated tires .
The best solution is to use a tire with an LT rating that has the highest weight rating in pounds as listed on the sidewall .
That weight rating is more important than brand .
An ST rated tire is not rated for motorhome usage .
The ST placard says " For Trailer Usage Only "
Many have upgraded to an "E " tire which requires 80 psi .
Many have upgraded a size or two such as from a 245/75R16E to a 265/75R16E .
Both options increase tire reserve capacity .