​In Formula 1, the undercut is a pit stop strategy in which a driver pits before a direct rival to exploit the pace advantage of fresh tyres during the rival’s slower in-lap, then accelerates on the out-lap while the opponent remains on worn rubber. The goal is to emerge ahead once the rival finally pits. F1 Chronicle analyzed 766 verified undercut attempts from 2022 through 2026, finding that typical successful undercuts yield gains ranging from about 0.5 to 2.5 seconds, though the effectiveness varies significantly from circuit to circuit. An undercut, at its core, capitalizes on the faster pace of fresh tyres while the rival suffers on a harsher, slower in-lap and a degraded out-lap. Across the 766 measured attempts in this period, Las Vegas emerged as the strongest undercut circuit, with a median gain of 4.22 seconds. Bahrain, by contrast, stands out as the most reliable venue for the undercut, delivering a median gain of 2.38 seconds across 82 attempts—the largest single-sample subset in the dataset. It’s important to note that the undercut does not universally apply; in Melbourne and Qatar, the median attempt actually loses time, identifying those venues as overcut circuits. The biggest risks involve rejoining traffic after the stop, a rival immediately covering the stop with their own pit, and the danger of tyres degrading late in the race.
The undercut persists because two fundamental aspects of modern Formula 1 remain constant: fresh tyres are faster than worn tyres, and overtaking on track is challenging. Rather than dueling wheel-to-wheel, a team can outpace a rival through the pit cycle. The attacker pits first, gaining an immediate advantage from fresher tyres, and cumulatively builds time on every lap the rival holds station on older tyres. If the accumulated banked time surpasses the gap to the rival, the attacker ends the sequence ahead once the opponent finally pits. This tactic gained prominence after the 2009 ban on refuelling, when fixed fuel loads meant tyre condition became the dominant performance variable and the timing of a single tyre change became the sharpest strategic weapon on the pit wall.
The scenario often features two rivals running in dirty air, closely matched, with overtaking on track being difficult. The attacking team commits to the first stop, accepting roughly a 20-second pit-time cost. The attacker then drives aggressively on the out-lap and in the early laps after the stop, while the defender circulates on older, slower tyres. Each lap the defender spends cooling and lagging allows the attacker to reclaim time, and when the defender finally pits, race positions can be settled by the stopwatch.
A contemporary illustration of the mechanism occurred at this season’s Barcelona Grand Prix: Max Verstappen pitted on lap 12 while 3.7 seconds behind Oscar Piastri. Two laps later, after both drivers had pitted and completed two racing laps, Verstappen faced a swing of 6.3 seconds in his favour, achieved purely through the pit cycle. That is the undercut functioning as intended—a pass decided in the pits rather than on the track.
Most explanations of the undercut stop at the theoretical level. To quantify it, F1 Chronicle conducted a comprehensive analysis of every dry-race pit-stop pair from the 2022–2026 seasons using official F1 timing data, yielding 766 genuine undercut attempts after filtering for safety cars and other anomalies. The aim was to measure the practical impact of the undercut—its frequency, magnitude, and circuit-by-circuit variations—across a substantial, multi-year sample.