Erik Jones was fastest in the final practice session for the Xfinity Series race at Chicagoland Speedway.
Jones and his No. 20 Toyota posted a top speed of 173.310 mph during his 28 laps around the 1.5-mile track.
Brennan Poole, ninth fastest, recorded the most laps in the session with 41.
The session was stopped once for Matt Mills getting into the wall in Turn 1.