What is the pit window in F1?
The range of laps in which stopping makes strategic sense given tyre life and the cars nearby.
A pit window is the span of laps during which a car can make a planned stop without losing out — early enough that the tyres still have life, late enough to reach the finish on the next set. Teams talk about a rival being "in the window" when an undercut or overcut becomes possible. A Safety Car appearing while a driver is inside their window is a windfall, because they can stop while the field is slowed and lose far less time than usual.
See also: how long an F1 race is.
Related strategy & the pit stop terms
- The undercut — Pitting for fresh tyres before a rival, then using the grip advantage to jump ahead once they stop.
- The overcut — Staying out longer than a rival on older tyres, then using clear track to pit later and emerge ahead.
- Box / "box, box" — The radio call telling a driver to come into the pits this lap; "box" comes from the German for the pit garage.
- Marbles — Bits of worn tyre rubber that collect off the racing line and are very slippery to drive over.
- Out-lap and in-lap — The out-lap is the lap leaving the pits on fresh tyres; the in-lap is the lap driven into the pits before a stop.
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Definition written in plain language from the current F1 sporting rules and common usage, current as of 14 August 2026. Unofficial; not affiliated with Formula 1.