WE WERE TRAVELING ON THE INTERSTATE WHEN WE SAW SMOKE COMING FROM OUR MOST REAR AXEL ON THE PASSENGER SIDE. A PASSING CAR INDICATED WE HAD A FIRE. WE PULLED OVER WHEN IT WAS SAFE TO. USED 4 FIRE EXTINGUISHERS AS WELL AS CALLED 911 WHEN FIRE DEPARTMENT SPRAYED AS WELL. FOUND THAT THE BARING SIEZED UP IN THE AXEL. WE HAD LOCAL TIRE SHOP ASSIST WITH GETTING US BACK ON THE ROAD. CONTACTED MANUFACTURE. THEY AUTHORIZED REPAIRS. REPAIRS WERE DONE AT PURCHASING DEALERSHIP.