Six Cup teams participated in a tire test on Tuesday at the concrete short track, and it remains unclear whether it resulted in any solid answers or will prompt a change in the tires used for the next event.The Sept. 21 race will be run at night and serves as a cutoff race in the Round of 16 of the Cup Series playoffs.In the race in March, Goodyear brought the same tire combination that was used ...<a class='more' href='https://www.motorsport.com/nascar-cup/news/drivers-tackled-tire-test-after-head-scratching-spring-bristol-race-/10635598/?utm_source=RSS&utm_medium=referral&utm_campaign=R SS-NASCAR&utm_term=News&utm_content=www'>Keep reading</a>

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