Wheel size upgrade.
My (new/old) 79 Holiday Rambler 27 is still sitting on 16.5 bias ply tires (all 6 less than a year old). I intend to budget for 6 radial tires to replace them (better ride and improve fuel economy). ...
Forum Discussion
I would only add that increasing tire size can adversely effect fuel economy. Increasing tire size in effect loads the engine more at a given speed. It has the same effect as reducing the axle ratio which the engine sees as a higher load. All of this of course is dependent upon road and driving conditions and loading of the vehicle. I do agree that they do need higher ground clearance though. My dump pipe is crazy low. In fact it had broken the gray water tank fitting. Discovered this after I'd bought it. New water tank installed but wish I'd rerouted. I have a set of Firestone air bags in it that help a lot.
