F1 2017 How can I edit tyrewear?

F1 2017 The Game (Codemasters)
How can I edit tyrewear of williams??
because MAS and STR stops 4~5 times althogh other drivers 1~2 times.
In my game , williams drivers can't get any points whole the season because they have 1 or 2 more pitstops every race.
How can I edit tyrewear?
 
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