Pit Stops & the Tyre Rule

In a dry race, every car must use at least two of the three nominated slick compounds. Because you cannot change compound without stopping, that rule forces a minimum of one pit stop into every dry Grand Prix — the foundation of race strategy.

Anatomy of a pit stop

A full stop changes all four wheels in around two seconds — roughly twenty people moving in choreographed unison. Each corner has a three-person crew (one on the gun, one off with the old wheel, one on with the new), with others working the jacks front and rear while a “lollipop” or light system tells the driver when to launch. Modern F1 cars carry enough fuel for the whole race and refuelling is banned, so a stop is purely about tyres.

Two seconds sounds impossibly fast, and it is the product of relentless rehearsal: crews practise hundreds of stops, and the difference between a good stop and a great one — half a second — can be the difference between holding a position and losing it. A cross-threaded wheel nut or a gun that does not engage can turn that two seconds into ten and ruin a race that was going perfectly.