Pirelli's Paul Hembery has said F1's big technical change made it necessary for a re-think on tyres but denied that this year's rubber is too conservative.A number of drivers have suggested this season that Pirelli have 'played safe' with their rubber as they've adapted to new hybrid cars which have less grip than their predecessors but also more torque.Stung by negative publicity they've received in the past, Pirelli have provided harder rubber this season. Even so, Hembery insisted the Italian manufacturer hasn't played it cautiously.'Conservative is, I don't think, really the right word,' Hembery, Pirelli's Motorsport Director, told Sky Sports News. 'I think we had to take a little step...
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