Formula One supplier Pirelli will change the compound of its hard tyres from next month's Spanish Grand Prix after evaluating performance data from the first four races of the season.
Formula One tyre supplier Pirelli warned teams on Thursday that they will quit the sport at the end of the season if a new contract from 2014 is not agreed soon.
A metal plate shed by a car has been blamed for alarming punctures suffered by Formula One world champion Sebastian Vettel and Ferrari's Fernando Alonso in Friday's Belgian Grand Prix practice.
Sole supplier Pirelli has warned that it could walk away from Formula One after the current season if the sport fails to ratify tyre testing plans by close of play on Monday.
In a statement explaining how the tyres are marked at their Turkish factory with embedded and traceable bar codes that cannot be swapped, Pirelli said their process was designed to be tamper-proof and random.
'We have finalised the investigation into Sebastian Vettel's tyre at Spa. Detailed conclusions from the technical analysis will be presented at Monza'
Germany's Nico Rosberg won a dramatic British Grand Prix for Mercedes on Sunday after one of several explosive tyre failures scuppered team mate Lewis Hamilton's hopes of home victory.
Formula One can count its lucky stars after Sebastian Vettel and Nico Rosberg escaped unscathed from high-speed tyre blowouts at the Belgian Grand Prix.
Formula One drivers sought reassurance from tyre supplier Pirelli on Friday after world champion Sebastian Vettel and Ferrari's Fernando Alonso suffered punctures in second practice at the Belgian Grand Prix.
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