Tire Pressures
A good primer. Be sure you know what specifically the manufacturer of your tires recommends for inflation on their own websites. Firestone, on their 19.5" tires on most class A's, recommends no less than 95#'s, for the proper rigidity of the side walls, irregardless of the weight on the axel.
Lowering inflations to axel weight ratings will often give you a softer, more compliant ride, but it affects other areas of the suspension. Be sure you are aware of ALL the variables when selecting the inflation that works best for you.
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