So I just returned from a 6412 mile trip from NC to Yellowstone to Grand Canyon and back. About half way I was checking the tire pressure and doing an inspection over everything and I noticed that the inside of the tire tread was gone, no tread left. I assumed from the beginning I was over weight as I only had so much room in the back of my pickup and the camper I have (2006 Fleetwood Niagara) only allows for about 280 pounds or so loaded in the camper. I had two coolers each weighing about 80 pounds, food, charcoal... and so on, I have no idea what I weighed, but I knew I was over. I ended up getting new tires (it was time anyway) and made the trip without incident. Anyway, is there any solutions for getting the allowable weight in the pup increased for supplies? Do I have to do an axel swap? Can I just up grade to a heavy duty tires? Any suggestions would be a great help. Thanks.