Most RV owners apply car tire thinking to their rigs, focusing on tread depth and mileage as replacement indicators. But RV tires age differently because of how RVs are used and stored. While your car tires rack up consistent miles and regular flexing, RV tires often sit stationary for months, then suddenly carry maximum loads over long distances.
The rubber compounds in RV tires begin degrading from UV exposure, ozone, and temperature cycling regardless of mileage. Industry recommendations call for replacement every 6-7 years regardless of tread depth, but many owners push this timeline thinking low-mileage tires are still safe. Sidewall cracking and internal belt separation can develop in tires that look fine from above, creating blowout risks that won’t show up in a casual visual inspection.
What makes this more complex is that RV tires carry much higher loads relative to their size compared to passenger car tires. A tire rated for 3,000 pounds that’s carrying 2,800 pounds runs much hotter and experiences more stress than a car tire at 60% of its rating. This load factor accelerates aging even when the RV isn’t being driven frequently.
A practical approach many experienced owners use: track both the manufacturing date (found in the DOT code on the sidewall) and keep a simple log of actual weights from truck scales. If you’re consistently running near maximum tire ratings or storing outside without covers, lean toward the shorter end of replacement timelines. The cost of preventive replacement is typically much less than roadside tire service or potential damage from a blowout.