Weights. Am I missing something?

Welcome to the adventures of trying to match a camper to your truck and being within the specs. With that diesel on board it will be difficult. The lance 850 and northern lite 8-11 will get you close, but when you fill them with water, batteries, propane, clothes, gear, and groceries you’ll likely be over weight per specs of your truck. The lance 855s and AF 811 will make you overweight just by putting the camper on dry! The AF being the heavier of the two! I have a 15 Ram Megacab SB 3500 SRW 4x4 with the 6.4 gas with payload of 4069lbs printed on the door sticker, and thought I’d hit the jackpot! Well long story short we bought a Chalet S85RS (close in specs to the AF 811) thinking the Manufactures sticker of 3600lbs wet would put us on the money as far as being within the trucks specs. WRONG! Wound up with a 4000 lb camper that weighs just shy of 5000lbs fully wet and ready to travel. GVWR 11000, actual weight 13000. GRAWR 7000, actual weight 8700! Tires rated at 7200 for the pair! I’m over specs everywhere but the front axle and front tires. With that said, we’ve Halle’s this camper 10000 miles without any problems thus far and no tire failures. I’d love to have a dually under our camper but can’t make myself spend the money. What I am considering is adding a set of Rickson 19.5 wheels and 245/70/19.5 tires for peace of mind. Good luck with finding a camper that meets your needs.