Red Bull say that changing the design of Formula 1's tyres mid-season was key to Sebastian Vettel's title win. Ferrari's Fernando Alonso was only 21 points behind the German after eight races this season. But the tyres were changed after failures at the British Grand Prix in June, and Vettel has won seven out of eight races since. 'Going back to 2012 tyres for sure helped us,' Red Bull designer Adrian Newey said. 'Our car generally gets quite a bit of its benefit in the high-speed corners and the '13 tyres were much more load-sensitive. 'It was much easier to damage them if you put too much load into them, so we couldn't really use that high-speed benefit on the '13 tyres.' Alonso had...
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