These tires are cheaply made. Of the 4 new tires on my RV, one blew out at almost exactly 5000 miles, the same tire on the opposite side of the RV was stretching in the center and appeared that it was about to go at the same time, and the other two lasted another 1500 miles before they became misshapen. Replacing those last two tires as I write this. Tires are 7 mos. old and averaged 5750 miles before failing or having obvious sign of impending failure.