1998 Four Winds 22rk without water, or tanks filled, but loaded with normal complement of people, Front:4500 lb rear 6600. Rear tire air at 78 lb, front tire air at 74 lb. Max gross front 4600 rear 7810, total gross 11500. You can see I have about 200lb in the front and about 1200lb in the rear left to use. Tires can handle about 2600lb each, four in the rear two in the front.
This will give you and idea of what to look for. Found the above info on the Thor document web site that matched the sheet of paper Thor put on the wall of my MH closet. Most RV's should have this info posted my the manufacture some where in the unit. From here do you own math.