Good choice on the Endurance! Replaced the original maypops on my last trailer (two did pop after 14k miles) with them and shortly after got a tire monitoring system so the valve stems had to be changed. Did it myself and those tires had very rigid sidewalls and a tough bead. Needed 40 psi to reseat them. New trailer this year has Trail King tires and had to change stems again. Popped the bead with almost no effort and it took only 14 psi to reseat them and the sidewalls were flimsy. No wonder they must be inflated to 80 psi no matter what the load is. GoodYear has a chart for inflation vs load for the Endurance tires. Good luck with your tires and you will be able to have confidence in them on the road.