Pirelli explains Raikkonen's Italian GP soft F1 tyre blistering

Pirelli believe that the blistering that ended Kimi Raikkonen's hopes of winning Formula 1 Italian Grand Prix was triggered by a perfect storm of circumstances

Pirelli explains Raikkonen's Italian GP soft F1 tyre blistering

F1 teams entered Sunday's race at Monza on the backfoot in terms of set-up requirements, after the weekend's first practice session was affected by bad weather then a Marcus Ericsson crash resulted in a lengthy red flag in FP2.

The 10-lap long runs teams were able to complete proved to be not enough to fully understand how the tyres would behave over a full race distance.

Pirelli's motorsport racing manager Mario Isola said: "Friday was a very strange day with FP1 that was wet, so teams had to concentrate all their work on the car in FP2.

"And then there was Ericsson's crash, so FP2 was one hour in which they had to set up the car, test two compounds for the delta lap time and try to do a long run with a heavy car on a full tank.

"The long run was 10 laps, so then you try to extrapolate what happens, but it is not something that is linear."

Although the lack of running earlier in the weekend was the same for all teams, Raikkonen was especially hurt in the race because of the unique circumstances he faced.

After his pitstop, he had had to push harder and longer than he would have liked on fresh soft tyres to ensure Lewis Hamilton could not overcut him.

The combination of that, plus being trapped behind Valtteri Bottas, which meant his car was losing downforce and sliding more, ultimately triggered the blistering problems that proved so costly.

"The soft compound is more prone to blisters because of the low wear," added Isola.

"Low wear means a lot of heat generation inside the compound and therefore blisters.

"If you follow another car you lose some downforce, and you slide a bit more. So compared to the supersoft, which is generating more grip and sliding less, this is all creating blisters.

"Then it is clear that if you push from lap one when the tyre is new, you have more rubber and you exacerbate the effect."

shares
comments
What's left to sort in F1's crazy 2019 driver market

Previous article

What's left to sort in F1's crazy 2019 driver market

Next article

Fry returns to McLaren to strengthen F1 team's technical department

Fry returns to McLaren to strengthen F1 team's technical department
Load comments

About this article

Series Formula 1
Drivers Kimi Raikkonen
Author Jonathan Noble
Why Tsunoda can become Japan’s greatest F1 talent Plus

Why Tsunoda can become Japan’s greatest F1 talent

While Japan's fever for motor racing is well-documented, the country has yet to produce a Formula 1 superstar – but that could be about to change, says BEN EDWARDS

Why the demise of F1's hypocritical spending habit is cause for celebration Plus

Why the demise of F1's hypocritical spending habit is cause for celebration

For too long, F1's richest teams have justified being able to spend as much as they want because that's the way they've always conducted their business. STUART CODLING says that's no reason not to kick a bad habit

Formula 1
Apr 14, 2021
The double whammy that is defining Vettel’s F1 fate Plus

The double whammy that is defining Vettel’s F1 fate

It's been a tough start to Sebastian Vettel's Aston Martin F1 career, with a lack of pre-season testing mileage followed by an incident-packed Bahrain GP. But two key underlying factors mean a turnaround is not guaranteed

Formula 1
Apr 14, 2021
The diva that stole a march on F1’s wide-bodied opposition Plus

The diva that stole a march on F1’s wide-bodied opposition

In 2017 new F1 technical regulations were supposed to add drama - and peg Mercedes back. STUART CODLING looks at the car which, while troubled, set the stage for the wide-bodied Formula 1 era

Formula 1
Apr 13, 2021
The themes to watch in F1’s Imola return Plus

The themes to watch in F1’s Imola return

Three weeks is a long time in Formula 1, but in the reshaped start to the 2021 season the teams head to Imola to pick things up after the frenetic Bahrain opener. Here's what to look out for and the developments to follow at the Emilia Romagna Grand Prix

Formula 1
Apr 13, 2021
The 'new' F1 drivers who need to improve at Imola Plus

The 'new' F1 drivers who need to improve at Imola

After a pandemic-hit winter of seat-swapping, F1 kicked off its season with several new faces in town, other drivers adapting to new environments, and one making a much-anticipated comeback. BEN ANDERSON looks at who made the most of their opportunity and who needs to try harder…

Formula 1
Apr 12, 2021
The delay that quashed Aston Martin’s last F1 venture Plus

The delay that quashed Aston Martin’s last F1 venture

Aston Martin’s only previous foray into Formula 1 in the late 1950s was a short-lived and unsuccessful affair. But it could have been so different, says NIGEL ROEBUCK

Formula 1
Apr 10, 2021
Verstappen exclusive: Why lack of car-racing titles won't hurt Red Bull's ace Plus

Verstappen exclusive: Why lack of car-racing titles won't hurt Red Bull's ace

Max Verstappen’s star quality in Formula 1 is clear. Now equipped with a Red Bull car that is, right now, the world title favourite and the experience to support his talent, could 2021 be the Dutchman’s year to topple the dominant force of Lewis Hamilton and Mercedes?

Formula 1
Apr 9, 2021