Pit stop rules

WEC pit stops are regulated to be sequential, not parallel. Energy replenishment and tyre changes may not happen simultaneously, crew numbers over the wall and wheel guns are limited, and the result is a stop measured in tens of seconds where Formula 1 measures in twos. The slowness is a deliberate cost and safety choice, and it makes the tyre-change decision itself strategic: skipping tyres saves the entire tyre phase of the stop.

The regulated stop is also why undercuts and overcuts work differently here: with stops this long, track position swings on whether rivals take tyres, not on out-lap heroics alone.