#51-Erik Jones was fastest during opening practice at Iowa Speedway on Friday. During what is being considered a test day for all of the teams, Jones led the way with a speed of 134.979 mph. #29-Ryan Blaney was second, followed by #19-Ross Chastain, #17-Timothy Peters, #9-Ron Hornaday, #5-Tim George, Jr., #4-Jeb Burton, #32-Miguel Paludo, #54-Darrell Wallace, Jr., and #62-Brendan Gaughan. 30 of the entered 35 teams participated in the session. See complete results on the Iowa practice 1 speeds page (pdf) .
