the only thing different would be the load rating, and the actual plies the tires are, all the older trailers had firestone passenger tires, and I believe the new ones do too, different brand though, just check the PSI on each tire cold, and keep them inflated correctly and your good to go. P.S. trailer tires are pricey as well, my buddies and my brother run goodyear trailer tires on their Rangers and they are almost 180 a tire, ouch.