Pirelli has released a number of conclusions made following an investigation into the series of tyre failures seen at last weekend’s British Grand Prix.
The Italian manufacturer came under intense criticism after tyre blowouts were suffered by Lewis Hamilton, Felipe Massa, Jean-Eric Vergne and Sergio Perez during the 57-lap Grand Prix.
Pirelli stated they concluded that each of the four failures were suffered by cars that had reverse mounted the rear tyres.
“The tyres supplied this year have an asymmetric structure, which means that they are not designed to be interchangeable,” a statement said.
“The sidewalls are designed in such a way to deal with specific loads on the internal and external sides of the tyre, so swapping the tyres round has an effect on how they work in certain conditions.”
The manufacturer also cited teams going against the pressures suggested by Pirelli increased the chance of failures occurring, as well as the suggested camber limits being broken.
“The under-inflation of the tyres and extreme camber settings, over which Pirelli has no control, are choices that can be dangerous under certain circumstances.”
Pirelli have requested to the FIA that teams are supervised in regards to suspension setup so that safety parameters are not broken in the future.
A similar issue regarding camber angles was last brought up at last year’s Belgian Grand Prix, where Red Bull Racing were put in the spotlight for exceeding Pirelli’s maximum recommendation.
As well as putting the teams at fault, Pirelli also concluded that curbing at the Silverstone Circuit had played role in the four tyre blowouts and were keen to explain that Silverstone was not the continuation of a trend of unreliability.
“The only problems that had come to light before Silverstone were to do with delamination, which was a completely different phenomenon.”
“Pirelli found a solution by suggesting that the teams use the tyres that were tried out in Canada from Silverstone onwards.”
“When this proposal was not accepted, Pirelli found another solution through laboratory testing, with a different bonding process to attach the tread to the carcass.”
“The problem of delamination has nothing at all to do with what was seen in Great Britain.”