Standard plastic leveling blocks sold at RV stores create a hidden problem that most owners discover too late: they concentrate your RV’s entire weight onto a much smaller contact patch than your tires were designed to handle. A typical RV tire spreads its load across roughly 50 square inches of ground contact. Most leveling blocks reduce that to less than 20 square inches, creating pressure points that can cause internal tire damage even when you can’t see external problems.
The issue becomes worse in hot weather, when the plastic blocks themselves can soften and create uneven support. Many tire warranty claims get denied because inspectors can identify the telltale stress patterns that leveling blocks create — particularly the distinctive flat spots that develop when a tire sits on a narrow block for extended periods.
Professional RV transport drivers and full-timers typically use either wider wooden blocks or purpose-built leveling systems that maintain the tire’s natural footprint. Two-by-ten lumber cut to appropriate lengths distributes weight much more evenly than plastic blocks, costs less, and doesn’t soften in summer heat. Some owners carry adjustable jack stands that lift the entire axle, taking weight off the tires entirely during extended stays.
The solution isn’t avoiding leveling — an unlevel RV creates its own problems with appliances and slide-outs. Instead, it’s using leveling methods that work with your tires rather than against them. Your tires are expensive enough to replace without shortening their life through well-intentioned but problematic leveling practices.