Most RVers treat leveling blocks like building blocks — stack them up until you reach the right height, then drive on top. But leveling blocks are designed to distribute weight across their full footprint, and improper stacking concentrates your RV’s weight into pressure points that can damage both your tires and the blocks themselves.
The critical detail most people miss is that blocks need to be perfectly aligned and fully supporting each other. When blocks are slightly offset or when you use too many thin blocks instead of fewer thick ones, the weight distribution becomes uneven. This creates pressure points on your tire sidewall and can cause blocks to shift or crack under load. A good rule is to use the fewest blocks possible to achieve level — two thick blocks are almost always better than four thin ones.
What’s less obvious is how this affects tire wear patterns. Tires sitting on improperly stacked blocks develop flat spots and sidewall stress that doesn’t show up until thousands of miles later. The contact patch where your tire meets the blocks should be even and stable, not rocking slightly or bridging across uneven surfaces.
Before driving onto any leveling setup, get out and physically check that the blocks are firmly seated against each other with no gaps or wobbling. Many experienced RVers keep a small level specifically for checking their block setup before committing their full weight to it. Taking an extra two minutes to verify your stacking can prevent both immediate stability problems and long-term tire damage that won’t be obvious until your next tire inspection.