[Fulltiming]

Steve, looking at the Michelin Tire Load and Inflation Tables, the 11R24.5 G tires have a lightly higher load carrying capacity at 85 psi than the 11R22.5 G tires.  With 11R22.5 G's you would be right on the edge at 85 psi (10,440 front and 19,800 rear) while the 11R24.5 G tires would have a little extra capacity on the front (11,100) and quite a bit on the rear (21,040) based on your GAWR's.  So running the 11R22.5 G's I would definitely increase the air pressure.

http://www.michelinrvtires.com/reference...-tables/#/