Gragson posted a fastest lap time of 22.862 seconds, showcasing exceptional speed and consistency at Iowa Speedway.
Gragson's quickest lap came on his 39th of 40 laps, showing his endurance and peak performance capabilities.
Ty Gibbs and Alex Bowman trailed Gragson, securing the second and third positions, respectively, in the practice session.
Multiple drivers, including Christopher Bell, faced tire issues during the session, raising concerns about reliability and safety.
Bell, initially leading the session, suffered a cut tire, forcing him into a backup car for the race.
Drivers expressed frustration and safety concerns over the unexpected tire failures during practice at Iowa Speedway.
Joe Gibbs Racing, including Ty Gibbs, encountered early tire issues, affecting their preparation and strategy for the race.
Goodyear faces scrutiny to address the unexpected tire failures ahead of the NASCAR Cup Series event.
Real-time data from practice sessions will guide Goodyear in adjusting tire compounds and pressures for improved performance.
The race outcome depends on Goodyear's ability to ensure tire reliability and safety on Iowa Speedway's partially repaved track.