Daniel Hemric paced the field in the first of two Camping World Truck Series practice sessions at Michigan International Speedway with a lap of 185.009 mph.
Hemric’s speed shows the track record could be in jeopardy during Saturday’s qualifying session. Jeb Burton set the track record of 185.759 mph in Aug. 2013.
Cameron Hayley was second Friday with a lap of 184.186 mph. He was followed by Erik Jones (184.082 mph).
Spencer Gallagher went to a backup after slapping the wall with his truck.