Feb.16 - Paul Hembery has denied an early flaw with Pirelli's 2017 tyres may already have been uncovered.

In 2013, F1's official supplier came under a bright spotlight when several tyres 'exploded' during the British grand prix.

Pirelli's Mario Isola said this week: "The incident at Silverstone was a single episode, the cause was identified and we fixed the problem in seven days."

But now, Pirelli has developed tyres that will have to go through corners up to 40km/h faster, to accompany the radical aerodynamic rule changes for 2017.

Last week at Ferrari's own Fiorano circuit, Sebastian Vettel was testing the 2017 rain tyres when he slid into a barrier at speed.

Pirelli F1 chief Paul Hembery told the German broadcaster RTL: "It was very cold on that day -- it was extremely abnormal conditions that made testing very difficult and delicate.

"It was only 4 degrees, which is unusual," he added.

Asked if the tyre had suffered a problem, Hembery answered: "Again, to get the tyres to work in those temperatures is the problem."


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