25 April, 2013 Pirelli tyre compounds to change Formula 1 tyre 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. Motorsport director Paul Hembery said in a statement on Thursday that the decision was taken in consultation with all 11 teams, some of whom have been complaining that the tyres are too unpredictable and do not last long enough. 'We took the decision… to change the hard compound from Spain onwards, as we did in Barcelona two years ago when we also introduced a new hard tyre for the rest of the season,' he said. 'This latest version of the hard compound...
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