March 6, 20197 yr Moderators The Cup Series’ higher downforce and higher horsepower aero rules will debut at ISM Raceway near Phoenix this weekend, the first time this year this particular combination will see on-track action.That combination will result in higher speeds and increased tire loading, making the use of the proper level of air pressure an important factor in arriving at car set-ups.“When we tested on ...Keep reading View the full article
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