And F2 in 2020. I think this is a great move and with any luck there will be some trickle down tech to the tires and brakes we use at some point.
https://autoweek.com/article/formula-one/f1-moving-18-inch-tires-2021
https://autoweek.com/article/formula-one/f1-moving-18-inch-tires-2021