From some fairly in-depth reading and talking at length with my tire guy, what Really gets to our 2-3 axel trailer tires is.. the Scrubbing that occurs when we need to do Tight Turns (like backing into camping spots, turning around in tight spaces) on paved, or uneven surfaces.
And it's not so much the Rating.. as it is the Tire Construction. Not Enough Ply's, and/or, the type of material the ply's are made of... AND.. Tire Pressures.
When Scrubbing occurs, the Ply's can flex and weaken, separation can occur, the Tread part can begin to loosen from the Carcase/ply's.. the tire comes apart.. At Speed. This is where the Tire Pressure comes into play, too.
Soooo, IMO, from what I've learned.. The OE tires we get on some trailers are might not be adequate for the weight, For all the above reasons. Brand Legacy plays in too.... and adequately rated/constructed tires are not readily available.. for the 15" wheels we get.
Not to mention the "New Tire" age.. at time of purchase. (tire Born On date).
JLDickmon is our resident Tire Guy.. maybe he'll jump in ????
Joe
I made 16" wheels "Part Of the Deal", when I bought our Montana. Came with (CRAP) 235/85 E rated Generals on it. I've since changed them out to the same Goodyear's I have on my 350. Run 70psi.. in'm.
WOW..
3900 Posts. Hope some of'm have been useful