How many miles do you get out of your good tires?

My friend bought a new carriage 35 ft 3 slides with the towmaster tires, I said they are junk tires and he asked what do you think I should do buy new tires? YES !! He towed it to wash st. He towed it back to az and again back to wash st. Same for the next season. that was the total of his towing and it was sold. Tire blew going to the new owner and the fifth was empty. I told my wife that fifth will have a tire problem before it gets to az so I was guessing what happened.

chevman