Formula 1's official tyre supplier Pirelli has suggested that recent bad weather in Japan is contributing to the excessive tyre wear being reported by some teams after Friday's free practice at Suzuka.

Sebastian Vettel confirmed that Ferrari has been struggling with blistering, contributing to their big deficit to Mercedes in today's two 90 minute sessions.

But Pirelli's experts believe that two recent typhoons that have swept over Suzuka might be the explanation, as the violent weather has stripped the circuit surface of any rubber that had previously been laid down.

"In terms of asphalt roughness, we have quite a big step in macro roughness," Pirelli motor racing boss Mario Isola said. "This is probably due to the weather conditions

"It looks like the heavy rain with the typhoons changed the asphalt. This is affecting mainly the grip and wear, increasing the wear."

It wasn't just Ferrari that had been suffering from blistering during Friday's practice sessions, Isola confirmed. However not all cars have been affected by the issue.

And Isola felt that Ferrari would be able to change its set-up to address the issue for the rest of the weekend now that it has been identified, and that it didn't necessarily mean teams would be forced to make more pit stops in the race.

"The tyres are manageable," he insisted. "From the data today, they will be able to react and find a setup that is reducing or avoiding the blisters.

"One stop is still possible," Isola added. "I have to analyse the degradation and wear to understand if two stop is an advantage and by how much.

"We know that it is an advantage but it should be at least 10-15 seconds difference or else everyone will target a one-stop race.

"There is no reason to take the risk to stop twice and go back in traffic or damage the race because you cannot overtake."

Ferrari has put itself into a precarious situation by opting to bring more sets of the less durable supersoft compound to Suzuka than any other team.

Every driver gets 13 sets of tyres to last the whole weekend, and both Vettel and his team mate Kimi Raikkonen requested ten sets of the red-walled compound and just two of the soft, and one of the medium rubber.

By contrast, Mercedes have ordered just seven sets of supersofts, leaving them four sets of soft and two of the mediums.

But Isola said there was no way Ferrari could have known about the impact of the recent typhoons when they made their selection of compounds for the flyaway event.

"The fixed choice is made by the teams 14 weeks before, so a long time ago," he said. "They were probably targeting to have more runs on the supersoft in order to understand its behaviour here."

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Andrew Lewin

Andrew first became a fan of Formula 1 during the time when Michael Schumacher and Damon Hill were stepping into the limelight after the era of Alain Prost, Nigel Mansell and Aryton Senna. He's been addicted ever since, and has been writing about the sport now for nearly a quarter of a century for a number of online news sites. He's also written professionally about GP2 (now Formula 2), GP3, IndyCar, World Rally Championship, MotoGP and NASCAR. In his other professional life, Andrew is a freelance writer, social media consultant, web developer/programmer, and digital specialist in the fields of accessibility, usability, IA, online communities and public sector procurement. He worked for many years in magazine production at Bauer Media, and for over a decade he was part of the digital media team at the UK government's communications department. Born and raised in Essex, Andrew currently lives and works in south-west London.

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