F1: Pirelli determines cause of Baku Tire Failures

Pirelli, in conjunction with the FIA, has completed the analysis of the left-rear tires involved in the incidents that affected Lance Stroll and Max Verstappen during the recent Azerbaijan Grand Prix.

This analysis also took in the tires used by other cars in the race, which had the same or a higher number of laps on them compared to the ones that were damaged. The process established that there was no production or quality defect on any of the tires; nor was there any sign of fatigue or deamination. The causes of the two left-rear tire failures on the Aston Martin and Red Bull cars have been clearly identified. In each case, this was down to a circumferential break on the inner sidewall, which can be related to the running conditions of the tire, in spite of the prescribed starting parameters (minimum pressure and maximum blanket temperature) having been followed.

As a result of this analysis, Pirelli have submitted their report to the FIA and the Teams. The FIA and Pirelli have agreed a new set of the protocols, including an upgraded technical directive already distributed, for monitoring operating conditions during a race weekend, and they will consider any other appropriate actions.

We have worked closely with Pirelli and the FIA during their investigation into Max’s tire failure on lap 47 of the Azerbaijan Grand Prix and can confirm that no car fault was found. We adhered to Pirelli’s tire parameters at all times and will continue to follow their guidance.

We are grateful that following the weekend’s high-speed impacts, no drivers were injured.


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