DON'T EVER BUY POWER KING TOWMAX STR TIRES! EVER!

To the OP
WELCOME TO THE FORUM BUT Gee like this has been discussed to death here for the past couple of years.
Perhaps instead of spreading the word he should have been reading the threads about tires and learning.
I suspect that the tires were put on by the manufacturer of the rig so maybe YOU should be venting against them as well.

Perhaps you will stick around and learn other things that may prevent disaster