Before state laws prohibited it, used tires would be landfilled or stored in stockpiles, said Rick Heinrich, Goodyear’s product manager for NASCAR.
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 During a weekend of hot, high-speed friction against the asphalt of the NASCAR
Chicago Street Race course, thousands of tires burn out and wear down. After a few dozen laps, they lose their grip and become obsolete. But their life cycle doesn’t end there. | | | |
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