The top speeds all came from the first 20-minute session with Byron leading the way with an average lap speed of 117.101 mph.Byron turned out to be the only car in practice to top the 117-mph mark.“It will be slick. Richmond is always that way,” Byron said. “I noticed they painted the frontstretch – they put lines on the frontstretch, so I don’t know if that’ll play into running the ...<a class='more' href='https://www.motorsport.com/nascar-cup/news/william-byron-fastest-richmond-nascar-cup-practice/10501904/?utm_source=RSS&utm_medium=referral&utm_campaign=R SS-NASCAR&utm_term=News&utm_content=www'>Keep reading</a>

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