Pirelli confirm use of Kevlar in rear wheels at the Nurburgring, but pressure remains

Tyre manufacturer Pirelli have confirmed that the tyres they will be using at the German Grand Prix at the Nurburgring will have rear-wheel internal belts made of Kevlar rather than steel, as in the British Grand Prix at Silverstone.

Last weekend, Pirelli were put under the spotlight after the left rear tyres of Lewis Hamilton, Felipe Massa, Jean-Eric Vergne and Sergio Perez all failed during Sunday's race. They have been summoned by FIA president Jean Todt to attend a meeting of the Sporting Committee at the Nurburgring on Wednesday.

Kevlar is particularly resistant to punctures, but it also reduces the operating termperature of the tyres by around ten degrees Celsius, which could affect competitiveness between cars.

Bernie Ecclestone has claimed that Pirelli have been given the go-ahead to conduct two unrestricted three-day tyre tests to eradicate the tyre problems which came to a head in the British GP, although this has not yet been confirmed.