Sebastian Vettel believes the impending tweaks to Formula 1's tyres to stop the recent spate of delaminations are urgently needed, even if Pirelli has ultimately rowed back from a more performance-focused overhaul of their compounds.The sport's sole tyre supplier reacted to the criticism thrown at them in the wake of the pitstop-filled Spanish GP by announcing plans to revise the construction of their 2013 compounds from the Canadian GP onwards in order to both bring races back in line with their stated two-three pitstop target and stop the trend for tyres to lose their tread when cut by debris. However, it has since emerged that those alternations now won't be as widespread as initially...
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