Pirelli accept difficulty with F1 prototype tyre.
Pirelli has accepted to difficulties with its prototype tyre that could result in it not being introduced into Formula 1 as planned later this year. The Italian manufacturer opted to develop a new soft compound to make it more resistant to impacts with external objects, such as kerbs. In practice at Spa and Monza over the last week drivers have been running on the unmarked prototype tyre to assess it.
Pirelli racing manager Mario Isola has revealed the feedback from Spa was not overwhelmingly positive.
“There were two main areas – one was the pulling, considering the construction we were expecting a pulling on the left from the rear tyre, so we wanted to investigate this effect”, said Isola .
Isola added “It is a natural force of the tyre, and some cars felt the effect and some cars didn’t. The other strange behavior that was reported from Spa was a loss of grip compared to the current soft specification”. Isola continued “this is really strange because although there is a change to the construction, the compound is the same. I cannot explain why they felt less grip.”
Isola also revealed there was a difference in lap time, with one team claiming it was 0.8 seconds slower per lap with the prototype compared to the current soft tyre.