I've run this pickup for 80k on this tire size with no problems. When I bought it in '12, it had new Goodrichs and then I ran a set of Cooper AT3's. The height, load and speed ratings are identical to the 265's. Even empty, these things wander around. With a load, the wandering is more like a drunk going where he wants to.

“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.