I have been towing for 30 yrs without any kind of problem with tires.I believe in lots of air and lots of grease,the trailers on the side of the road with tire and axle problems are as far as I am concerned are caused by neglect and expecting your trailer to carry way more than it should.I have seen more bent axles than I care to and I don't mean the ones that are suppose to be curved,rubber streaks being left by an 8 inch tire on the 401 can only lead to trouble.
vance