Reigning World Champions Mercedes have trialled Pirelli’s prototype 18-inch wheels for the first time, ahead of the impending switch for 2021. Formula 1 will switch from the current 13-inch size to 18-inch for 2021, as part of a raft of overhauls being implemented in the championship. Pirelli began testing with Renault and McLaren at Circuit Paul Ricard earlier this year, and on Sunday Mercedes was the next time to try the enlarged sizes. George Russell, who ran for Mercedes during Wednesday’s group tyre test action at Yas Marina Circuit, got behind the wheel of the modified version of the W10 once more for Sunday’s private test. Williams racer Russell, part of...
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