St tires vs LT tires

Good stuff. Our new trailer has Rainier tires. Never heard of them. We are prepping for a long trip, and my first instinct was to go with a good LT tire. Dealer does have the Maxxis, but Good Year and Firestone 10 plies have certainly served me well over the years.

Any experiences with these Rainiers? I suspect they are some imported junk