Yes, shame on you for expecting new tires on a $60,000 trailer to last more than 4,000 miles. Kidding of course. But I also bought a new 5th wheel and did my research THEN found, like you, that the manufacture put the cheapest tires on the rigs. I blame the government, manufacturers and buyers for not demanding better. The more we spread the word like these forums the more we can demand upon purchase bargaining. I've got a similar long story about tires and had the RV maker reimburse me. Good luck.