Twenty teammates. Two seconds. Total teamwork. F1 pit stops are iconic, but why are they so important, and why are they so difficult to do perfectly? Who's on the pit crew, and what does each person do? Katie and Christian get the answers from:

Christian and Katie break down an F1 pit stop - from the role of the driver, to the mechanics who fit the tyres - and how the crew works together to get the car back on track in the shortest possible time.

Check out other episodes of Formula Why. Scroll through the feed or use the links below:

Why do F1 drivers need race engineers? with Alfa Romeo's Zhou Guanyu

Why do F1 teams need simulators? with Aston Martin's Stoffel Vandoorne

Why is racing in the rain so difficult? with Mika Hakkinen + Haas race engineer Mark Slade

Why are street circuits the ultimate test? with Mika Hakkinen + Bernie Collins

Why do F1 drivers need to be so fit? with Alexander Rossi + Vettel's former trainer

Why is F1 Sprint such a challenge? with Kevin Magnussen

Got an F1 question for Christian, Katie and our F1 experts? Record or write it, and email to [email protected]

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