F1 Tyre Strategy: Why an Extra Pit Stop Can Sometimes Be the Faster Plan

A driver stopping twice while a rival stops once may look as though they have taken the slower route. The comparison only makes sense when the time lost in the pits is weighed against the time gained on track.

Tyres change the pace available to a car over a stint. Strategy therefore involves more than choosing the fewest stops: teams consider how performance develops, where the car will rejoin and what competitors are likely to do.

Formula 1’s official glossary explains the undercut, in which an earlier stop can allow a chasing driver to gain through faster laps before the rival stops. The idea depends on circumstances; fresher tyres do not guarantee an advantage in every situation.

A hypothetical two-stop calculation

Imagine an invented race in which an additional stop costs 22 seconds overall. If a fresher set could allow a driver to gain one second per lap for 25 laps, there might appear to be a three-second benefit.

That is only an illustration, not a strategy prediction. It assumes the driver can use the speed, avoids traffic and suffers no delay. Change those assumptions and the apparent advantage can disappear.

Suppose the car rejoins behind a slower group. The time available from the tyres may be spent waiting for a passing opportunity. Alternatively, clear air might make a plan more attractive than it looked from the raw pit-loss number.

The race keeps changing the question

Weather, interruptions and the behaviour of other cars can alter the choice. A plan made before the start is a working proposal, not a promise that every stop will happen on a fixed lap.

That is why radio discussions can sound indecisive when heard without context. Teams are comparing changing possibilities, and the information available to a television viewer is incomplete.

For watching, follow three things together: the gap to nearby rivals, the age and type of tyres, and the likely position after a stop. The leader on the road may still owe a stop, while a lower-placed driver may have already completed one.

The most satisfying part of strategy is the trade-off. An extra stop is not automatically a mistake, and staying out is not automatically clever. Each becomes good or bad through the time and track position it actually produces over the remaining race.

Calculate the pit stop against the laps remaining

Here is a deliberately simplified example. An extra stop costs 20 seconds, and a fresh set might gain one second per lap over the next 25 laps. The possible gross gain is 25 seconds, leaving five seconds before accounting for traffic, warm-up, changing tyre performance and the uncertainty in that estimate. If only ten useful laps remain, the same stop looks very different.

Those figures are invented for explanation, not measured data from a particular Grand Prix. Teams have to estimate how performance changes across a stint, not assume a constant advantage. A driver who rejoins behind slower traffic may be unable to use the pace the strategy model expected.

An undercut adds an opponent’s decision to the calculation. Stopping earlier can create fast laps on fresh tyres, but the rival may respond immediately, extend the stint or benefit from events elsewhere in the race. A safety car can also change the relative cost of stopping.

When watching, note the gap, the likely rejoin position and the remaining distance before calling an extra stop a mistake. The eventual result matters, but a strategy should also be judged against the information reasonably available when the decision was made, not only against a replay’s hindsight.