Well it happend to me today while traveling on I-90 east at sturges SD the left front trailer tire went boom. We were lucky there was no damage to trailer the tire had good tread and the right air presure. needlless to say i put the spare on and then went right down the road to Rapid city . There we looked up a Goodyear store and put 4 new fillgoods on the bighorn. I decided to put the goodyear marthons on it they know make it in a "E" rated 10 ply. Time will tell how good they are but i fill better for now. The alum rims were only rated at 80psi so they recamended not to go with a "G" rated tire. Goodyear has just started making the marathon in a 10 ply. The guys at the store were great they got me back on the road in less than 2hrs. We are on our way to Townsend Tnn. to work at the KOA there..