During the hour-long practice session*in Phoenix, the issues began when championship contender Chase Briscoe lost a left rear within five minutes of the start of the session. It was the first of many, and those failures are likely not an anomaly but a result of teams being aggressive with suspension adjustments and tire pressures.<br>Phoenix Raceway is a unique type of oval because it is ...<a class='more' href='https://www.motorsport.com/nascar-cup/news/why-are-so-many-nascar-cup-tires-failing-at-phoenix/10773029/?utm_source=RSS&utm_medium=referral&utm_campaign=R SS-NASCAR&utm_term=News&utm_content=www'>Keep reading</a>

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