Has anyone taken off their dual tires and put on a single wide tire on the back of their class a MH. Either 2 or 4 tire. If so, did it make a differents in your fuel mileage?
I don't think your going to find any one with a motorhome that has done this, it cost a lot of $$ to get new rims and tires for this, also you will than need to carry 2 spares, 1 for the front and 1 for the rear.
Anyways I have heard it only saves about 2-4 percent in mpg, not enough savings for the little miles we drive our motorhomes.