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The reason you should put a wood, cardboard or plastic barrier between the tires and concrete is to prevent the leaching of chemicals from the tires into the concrete. Have you ever noticed the tire treads clearly marked where you parked on the concrete? Those marks are oils that have beel pulled out of the tire.
I always assumed that the barrier was to prevent migration INTO the tire until a tire engineer corrected me. I asked about wood, carpet, plastic, etc. He recommended cardboard.
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2011 Allegro Bus
being pushed by a
2006 Jeep Liberty Diesel
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