How do I maintain the tires on my RV if it's stored for over a year?

Storing an RV for an extended period, such as over a year, requires specific attention to tire maintenance to prevent premature failure. Tires are a critical and costly component of your rig, and improper storage can lead to sidewall cracking, flat spotting, and internal ply separation. Following a systematic approach can significantly extend their lifespan and ensure your safety when you're ready to hit the road again.

The Core Principles of Long-Term Tire Care

Two primary enemies degrade tires during storage: ozone exposure and sustained pressure on one spot. Ozone, a gas in the atmosphere, causes rubber to dry out and crack. Constant weight on a single part of the tire tread leads to flat spots that may become permanent. Your maintenance strategy must address both.

1. Inflate to the Maximum Cold Pressure

Consult your RV's manual or the tire sidewall for the maximum cold inflation pressure, not the typical running pressure. Inflating to this higher pressure helps the tire retain its shape, resist flat spotting, and reduces the sidewall flex that can accelerate ozone damage. Industry findings, such as those from the Tire Industry Association (TIA), emphasize that proper inflation is the single most important factor in tire preservation during storage.

2. Relieve the Weight and Rotate Position

If possible, the best practice is to completely remove the weight from the tires. You can achieve this by using dedicated RV jack stands placed under the axles or frame, following the manufacturer's guidelines for proper lift points. If using stands is not feasible, move the RV every three to four months to shift the tire's contact patch. Even rolling it forward or backward a few feet can make a significant difference.

3. Create a Protective Barrier

Shield the tires from direct sunlight, rain, and ozone. If stored outdoors, use UV-resistant tire covers. For any storage scenario, consider placing a barrier between the tires and the ground, such as plywood or specialized tire pads, to prevent moisture absorption and ground ozone exposure.

A Step-by-Step Preparation Checklist

1. Clean Thoroughly: Wash the tires with mild soap and water to remove brake dust, dirt, and grime. Allow them to dry completely.
2. Apply Protectant: Use a non-petroleum-based, water-resistant tire protectant. Petroleum-based products can degrade rubber over time.
3. Check and Set Pressure: Inflate all tires, including the spare, to the maximum cold inflation pressure indicated on the sidewall.
4. Block and Chock: Ensure the RV is securely blocked and wheel chocks are in place, especially if you are not using jack stands.
5. Implement Your Weight Relief Plan: Place the RV on jack stands or mark your calendar to move the vehicle periodically.
6. Cover and Isolate: Install quality tire covers and place a barrier under each tire.

Important Considerations and Cautions

Before reinflating tires that have been stored for over a year, conduct a meticulous visual inspection. Look for any signs of cracking, dry rot, weathering, or bulges. The Rubber Manufacturers Association notes that aging is a factor in tire durability, regardless of tread depth. If the tires are over five years old, consult a professional for an assessment before use. Remember that this guidance is for general informational purposes. Always refer to your specific tire manufacturer's storage recommendations and have a qualified technician inspect your RV's tires and braking system before your first trip after extended storage.