I didn’t realize until today how limited they are on number of tires? They said Mercedes uses one less set of tires in practice so they can have a new set for the last segment of the race, but DeadBull had to put on a used set?
used, as in scuffs?
Competitors are allowed only a limited number of tyre sets during a race event: 13 dry, 4 intermediate, 3 wet. Each tyre must be marked with a unique identifier for tracking and scrutinizing during a race event.
Formula One regulations - Wikipedia