Overview
- Repeated left‑side blowouts triggered multiple red flags in the 50‑minute session, derailing preparations for the championship weekend at Phoenix Raceway.
- AJ Allmendinger suffered the most severe incident with a high‑speed Turn 4 impact that ended his day and forced Kaulig Racing to unload a backup car.
- Chase Briscoe and Christopher Bell logged limited laps after failures, while Daniel Suarez, Riley Herbst, Kyle Busch and others also encountered tire problems.
- A Goodyear representative attributed the issues to overly aggressive setups, and crew chiefs acknowledged low starting pressures and excess camber as contributing factors, with spike loads from shock limiters cited as a failure mechanism.
- Ty Gibbs topped the charts at 27.300 seconds as Denny Hamlin paced the Championship 4 in single‑lap times, with qualifying set for Saturday and the title race on Sunday.