Overview
- Multiple left-side tire failures halted Friday’s lone Cup practice at Phoenix, with incidents for Chase Briscoe, AJ Allmendinger, Christopher Bell, Daniel Suárez, Riley Herbst and others.
- Goodyear and crew chiefs attributed the problems to teams pushing low air pressures and high camber in the rare hour-long session rather than a tire defect.
- Ty Gibbs topped the speed charts; among the Championship 4, Denny Hamlin was fifth, William Byron ninth, Kyle Larson 11th and Briscoe 16th after completing only 24 laps.
- Qualifying is scheduled for Saturday on TruTV, and the winner-take-all Cup Championship race is Sunday at 3 p.m. ET on NBC with streaming on Peacock.
- This could be Phoenix’s final Championship Weekend for now, with NASCAR planning to move the season finale to Homestead–Miami in 2026.