The most common mistake made with an upgrade such as the OP is making is tire pressure. Lots of people will say to set your air pressure to the heaviest tire weight. When that recommendation is followed there is zero load capacity reserves for that tire. The slightest drop in air pressure for that tire puts it in an overloaded condition.
Industry standards tell us to use the amount of tire pressure needed to provide the load capacity recommended by the vehicle manufacturer. Look on the tire placard/certification label for that recommendation. In most cases - if available - an extra 5 psi will provided much needed reserves for the unpredictability of load variations with the RV trailer.
FastEagle
