New tires will be used Sunday at Darlington to go along with the low downforce package, and the NASCAR America crew discusses the effects the new tires will have on the already challenging track.
BRISTOL, TN - AUGUST 22: Kyle Busch, driver of the #18 Skittles Toyota, leads Denny Hamlin, driver of the #11 FedEx Ground Toyota, during the NASCAR Sprint Cup Series IRWIN Tools Night Race at Bristol Motor Speedway on August 22, 2015 in Bristol, Tennessee. (Photo by Brian Lawdermilk/Getty Images)
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