You are looking at the worst case numbers. The number on the side of the tire is for the most part a meaningless number, as is the bold number on the Goodyear chart. As mentioned above at a minimum we would need the axle weight ratings (front and rear) to give you a better number. Best yet are actual weights as you use the unit. The placard in the mh should provide the maximum weights each axle can carry. Give us those numbers.
FYI the weights provided by my mh manufacturer and those from Ford were the same. But they both disagreed with the numbers from Goodyear.