Pirelli suggests Baku F1 tyre blowouts may be caused by debris

Pirelli Formula 1 boss Mario Isola believes that the left rear tyre failures experienced by Max Verstappen and Lance Stroll in the Azerbaijan GP could have been caused by debris.

Pirelli suggests Baku F1 tyre blowouts may be caused by debris

Stroll and Verstappen both suffered huge accidents on the straight after experiencing what appeared to be similar failures while running Pirelli's C3 tyre, which was the hard compound in Baku.

Isola said a cut found on the left rear that came off Lewis Hamilton's car after the red flag indicated that a similar issue may have affected the other drivers, but in the world champion's case it had not compromised the construction.

Isola said that sudden deflations can often point to punctures caused by debris, as a structural failure would give more advanced warning.

However, Isola stressed that Pirelli hasn't ruled out anything yet, and that an investigation is already under way.

"Obviously we need to make an investigation, that is clear," Isola told Autosport. "What I have collected so far are just preliminary indications. It was sudden deflation both for Lance and for Max, without any warning.

"It was on the rear left tyre, that is not the most stressed here, because it's the rear right. And the other point if we talk about wear, the most worn tyre is the front right. So it is not a matter of wear.

"Another element that is important is that we found on the rear left tyre of Lewis Hamilton, another cut, quite a big one. This was at the red flag, so in the same stint where Max crashed.

Lewis Hamilton, Mercedes W12

Lewis Hamilton, Mercedes W12

Photo by: Zak Mauger / Motorsport Images

"The cars came, they dismounted the tyres to fit a new set, we checked the used tyres, and we found a cut on the rear left.

"Luckily, this cut was not cutting the construction. And that's why he didn't lose pressure. So we have evidence of another tyre with a cut.

"The other tyres that have been used during the same thing for 30, 32, 33 laps are not showing any evidence of a potential problem. This is what I know at the moment.

"The other step is that obviously we are air freighting the tyres to Milan tomorrow to analyse them as soon as possible. And find the real motivation that can be debris, or can be anything else."

Isola said he understood why Verstappen, Stroll and other drivers had expressed obvious concerns about the failures.

"It is almost impossible to design a tyre that is able to resist to any type of debris, if it is debris. If it is not debris, we have to consider our counter actions.

"But I fully understand that drivers crashing at that speed are worried, that is clear. I'm worried aware as well.

"I believe it was debris, because they didn't have any warning that there was something strange on the car, on the suspension, on the tyre, on the brake, nothing was giving any sign of failure. And it was a sudden failure.

"So considering the rear left is not the most stressed tyre, the cut we found on Lewis's tyre and so on, these are indications that are taking us in that direction.

"But we don't want to exclude anything because as Max said, these things shouldn't happen."

shares
comments

Related video

Leclerc lost Azerbaijan GP lead to Hamilton after avoiding tree branch

Previous article

Leclerc lost Azerbaijan GP lead to Hamilton after avoiding tree branch

Next article

Haas: Mazepin's finish line swerve at Schumacher a ‘misunderstanding’

Haas: Mazepin's finish line swerve at Schumacher a ‘misunderstanding’
Load comments
Why unseen Hungary heroics could be the making of F1's most overlooked driver Plus

Why unseen Hungary heroics could be the making of F1's most overlooked driver

The chaotic start to the Hungarian GP set the scene for F1's less heralded drivers to make a name for themselves. Esteban Ocon did just that to win in fine style, but further down the order one driver was making his first visit to the points and - while the circumstances were fortunate - took full advantage of the chance presented to him

Hungarian Grand Prix Driver Ratings Plus

Hungarian Grand Prix Driver Ratings

This was race that showcased the best and worst of Formula 1, producing a first time winner and a memorable comeback to a podium finish. Avoiding trouble at the start and astute strategy calls were key to success, but where some drivers took full advantage, others made key errors that cost them dearly

Formula 1
Aug 2, 2021
The “heart-breaking” call that led to Ocon’s Hungarian GP triumph Plus

The “heart-breaking” call that led to Ocon’s Hungarian GP triumph

Set to restart the red-flagged Hungarian Grand Prix in second, Esteban Ocon had some doubts when he peeled into the pits to swap his intermediate tyres for slicks. But this "heart-breaking" call was vindicated in spectacular fashion as the Alpine driver staved off race-long pressure from Sebastian Vettel for a memorable maiden Formula 1 victory

Formula 1
Aug 2, 2021
The F1 champion who became an Indy king in his second career Plus

The F1 champion who became an Indy king in his second career

Emerson Fittipaldi’s decision to go racing with his brother led to him falling out of F1, but he bloomed again on the IndyCar scene. NIGEL ROEBUCK considers a career of two halves

Formula 1
Jul 31, 2021
Why Mercedes is pleased to be in the Hungary hunt at a 'Red Bull track' Plus

Why Mercedes is pleased to be in the Hungary hunt at a 'Red Bull track'

Mercedes ended Friday practice at the Hungaroring with a clear gap to Red Bull thanks to Valtteri Bottas’s pace in topping FP2. But there are other reasons why the Black Arrows squad feels satisfied with its progress so far at a track many Formula 1 observers reckon favours Red Bull overall

Formula 1
Jul 30, 2021
How Red Bull endured its second car crash in two weeks Plus

How Red Bull endured its second car crash in two weeks

OPINION: Red Bull was justified to be upset that Lewis Hamilton survived his British GP clash with Max Verstappen and went on to win. But its attempts to lobby the FIA to reconsider the severity of Hamilton's in-race penalty were always likely to backfire, and have only succeeded in creating a PR disaster that will distract from its on-track efforts

Formula 1
Jul 30, 2021
The ‘screaming’ F1 engine future that may not be out of reach Plus

The ‘screaming’ F1 engine future that may not be out of reach

OPINION: It wasn't just the Verstappen/Hamilton clash that had the Red Bull and Mercedes bosses at loggerheads at Silverstone, with the nature of Formula 1's 2025 engines also subject for disagreement. But hopes to have loud, emotive engines that are also environmentally friendly don't have to be opposed

Formula 1
Jul 29, 2021
The drivers that need to strike gold before F1's summer break Plus

The drivers that need to strike gold before F1's summer break

OPINION: Formula 1 is about to break up for summer 2021, with the title battles finely poised. But it’s not just the latest round of Max Verstappen vs Lewis Hamilton that will be worth watching this weekend in Hungary, as plenty of drivers are eying big results to change the stories of their seasons so far

Formula 1
Jul 28, 2021