Larson posted the fastest average lap speed of 184.407 mph in the first 20-minute session. The top overall speeds all came from the first session on the track.<br>Team Penske teammates Ryan Blaney (183.973 mph) and Joey Logano (183.942 mph) were second and third, respectively.<br>Chris Buescher and William Byron rounded out the top-five. Bubba Wallace, fastest in the second 20-minute session, was ...<a class='more' href='https://www.motorsport.com/nascar-cup/news/kyle-larson-tops-vegas-cup-practice-burton-crashes/10439784/?utm_source=RSS&utm_medium=referral&utm_campaign=R SS-NASCAR&utm_term=News&utm_content=www'>Keep reading</a>

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