From next season , Formula 1 drivers will debut with 18-inch Pirelli tyres , 12 months before their debut in Formula 1 . The top - tier racers will begin using the bigger , lower - profile tyres later this year . The series is among several major sports rule changes scheduled for 2019 .
From next season, Formula 2 drivers will race with 18-inch Pirelli tyres, 12 months before their adoption in Formula 1. The top-flight racers will begin testing the bigger, lower-profile tyres later this year. The move is among several motor sports rule changes scheduled for 2021.