Brad Keselowski posted the fastest single lap in final practice for Sunday’s Overton’s 400 at Chicagoland Speedway (2:30 p.m. ET, NBCSN) with a speed of 180.826 mph. His average speed was sixth quickest at 170.369 mph during a 30-lap run.
He beat last year’s Chicagoland winner Martin Truex Jr. (180.656 mph) by .028 seconds. Truex had the quickest average speed of 170.887 mph that was set during a 25-lap run.
Chase Elliott had the second quickest average speed of 170.668 mph that was set during a 15-lap run.
Kevin Harvick (170.625) was third in regard to average speed during a 28-lap run.