Hey John, What tires did you end up getting?
They are Hi-Run ST225/75/15D's . . .
They were recommended by the repair shop that did the work on the trailer.
I had never heard of them and looked on line and found a couple good and bad reviews (there are always a couple of each).
However, the shop that did the work for me custom builds heavy duty flatbed trailers (for hauling excavating equipment) and these are the same brand tires they put on every trailer they build, and they recommended them after I expressed my concerns about what I wanted in a tire.
I'll be giving them a short run this weekend to try them out!
Here they are - on the axles and the second shot the new spare with the old BlowMax's stacked on the slideout rear bumper of our Trail Runner: