If the RV is not stored on a concrete surface, block the tires using wood or another aftermarket product designed for blocking tires. It is extremely important that the blocking you use is wider than the tires tread, and longer than the tires overall footprint. If not the steel cables in the tires sidewall can be damaged which can result in premature tire failure.
The first step is to make sure the RV is as level as possible so more weight isn't resting on one tire than the others. The perfect scenario would be to store the RV and its tires in a cool dry, covered area, but as we all know this is not always possible either.
There are actually several reasons for blocking your RV tires. Storage surface areas can cause your tires to age prematurely. You don't want to leave the tires in contact with any heat producing material or petroleum based material like asphalt. You also don't want them exposed to constant cold or moisture, like sitting on the frozen ground. The blocking acts as a barrier between the tires and the ground surface they are being stored on.
The proper tire storage steps would be to clean the tires, park the tires on suitable blocking, cover them to protect the tires from harmful sunlight and UV rays and inflate them to the pressure indicated on the sidewall of the tires.
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RV Education 101
As a seasonal camper our RV never moves, so I lifted it up on concrete blocks with a 2x6 between the block and frame. This offers extreme stability, and as you mentioned the tire life is extended by this. But I might ad that extended periods of not rotating the wheels will also cause flat spots on the wheel bearings causing premature failure and possible damage to the RV and or the tow vechile and passengers. Also deflait the tires over long park session will prevent the tires from rotting from the inside or replace the air with Nitrogen. SCress 25 years of rving and lovin every minute of it.
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