Renault tester Sergey Sirotkin has commenced Pirelli’s long-term development programme ahead of Formula 1’s switch to 18-inch tyres in 2021. As part of Formula 1’s regulatory overhaul in 2021 the championship will move from 13-inch rubber to 18-inch rubber. Pirelli first evaluated the larger tyres with Lotus back in 2014, running a concept tyre, and it has committed to moving to the 18-inch wheels from 2021. Formula 2 is making the switch a year early and Pirelli has already conducted several private tests with an adapted F2/18 machine on 2020-spec rubber. Ex-F1 driver Jean Alesi carried out a demonstration run at Monza last weekend. Sirotkin, who raced for Williams last...
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