Sebastien Buemi and Kamui Kobayashi have both further fuelled the fire that Pirelli were ‘too conservative’ in their tyre choice for the Spanish Grand Prix. Buemi was speaking following his first taste of the RB10, in the post-Spanish Grand Prix test, with the Swiss driver completing 54 laps on the opening day. 'We could see that maybe the tyres of Pirelli were maybe a little bit conservative,' he said. 'But still I had enough laps to get a good feel.' Despite not approving of the medium and hard tyre compounds however, Buemi declared himself happy with his days work, despite suffering a gearbox session mid way through the afternoon session: 'It was a good programme; obviously it was...
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