Pirelli believes a more mature track surface and warmer temperatures compared to last year are the main reasons behind the impressive speed of Formula 1's new-spec cars. Pre-season testing in Barcelona is seeing teams deliver lap times that are better than what most had projected given this year's new aero rules that are theoretically expected to impact performance levels. On Monday, Sebastian Vettel's fastest lap time was more than one second faster than last year's opening day best lap. New Mercedes 'quite a bit different' says Hamilton While many have been surprised by this year's relative performance, Pirelli F1 boss Mario Isola offered two specific reasons for the better-than-expected...
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