I was close to the limits of my 275/70R18 LRE Michelin tires (7500 lbs on the rear axle). I did not want to worry what I carried and how on the truck and attached trailer to make sure I stayed under those limits which is why I went to 245/70R19.5 LRH tires. If you are close to your tire limits, will you be weighing your load each time you go out or not varying what you will take with you? For us, each trip is loaded differently based on destination and duration and it was not worth it play load master to keep everything balanced and within specifications every time. I ended up rarely exceeding 8000 lbs (that 4-tons Grit dog posted) on the rear axle and the 19.5" rims gave me 9000 lbs of capacity which gave me plenty of reserve capacity for any changes I wanted to make.