Those "old" tires being used by racers are only do-able at Bonneville when running true race tires with 50-70 psi on moist, forgiving salt. And it's only done because Goodyear and others mostly stopped building Bonneville-specific tires. Sometimes, they only get one (1.0) run of 5 or 9 miles before tire tread failure. It doesn't work well with street tires from Wal-Mart or Costco.
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