I've gone through more tires on our trailers than I can remember. We run the proper hitch drop so the trailers run level, properly inflated as well. I've always run "trailer" tires on our dump trailers and wouldn't think of running anything else. I've run bias and radials in the proper configuration and never seem to get more than a season or so out of them. Maybe 15,000 miles. The most we usually haul is a few Z's and walkbehinds per trailer. I had an old beat 16' tandem trailer that I put "truck" tires on. Figured I give it a try and I know they don't have the same sidewall construction but I gave it a try. The tires did great ! I sold the trailer a couple years back to a tree guy. He hauls logs and branches with it and as best as I can figure these tires are now about three and a half or four years old. I looked at them the other day and they still were wearing ok, no uneven wear or bad blems. If a tire can handle the weight of a loaded down pickup shouldn't it handle a couple of mowers ? I'm buying quality tires and they just don't seem to last. Does anyone else run truck tires on single or tandems ?