#7-Justin Allgaier was fastest during opening practice at Charlotte with a speed of 181.690mph.
The rest of the top 10: #42-Alex Bowman, #9-William Byron, #20-Erik Jones, #19-Matt Tifft, #12-Sam hornish, Jr., #21-Daniel Hemric, #18-Daniel Suarez, #00-Cole Custer and #3-Ty Dillon.
30 drivers practiced during the session.
See complete results on the Charlotte practice 1 speeds page (pdf).
