Race strategy in F1 comes down to two questions: which tyre to run, and when to change it. The undercut and overcut are the two ways to gain positions through pit stop timing rather than outright pace. This guide covers the Pirelli compound range used in 2026, what each compound means for race pace and tyre life, and how undercut and overcut strategies play out in real-time from a grandstand.
Key facts
Pirelli supplies five dry-weather compounds per season: C1 (hardest), C2, C3, C4, C5 (softest). For each circuit, three of the five are nominated. These are labelled hard, medium, and soft regardless of which C-number they are.
Softer compound = more grip, faster initial lap time, shorter tyre life. Harder compound = less grip, slower lap time initially, longer tyre life before degradation.
Undercut: pit before the car ahead to exploit the grip advantage of fresh tyres. If the fresh tyre pace is fast enough to close the gap during the pit stop, the pitting car rejoins ahead.
Overcut: stay out when the car ahead pits, use the clear track to run faster laps, and rejoin still ahead after a later stop. Requires the car ahead's first laps on new tyres to be slower than the staying-out car's pace.
Each car must use at least two different dry-weather compounds during a dry race.
What the compounds mean in practice
In 2026, Pirelli nominate C1/C2/C3 for high-speed circuits with low tyre stress (Monza, Spa), C2/C3/C4 for medium-stress circuits, and C3/C4/C5 for high-degradation or slow-speed circuits (Monaco, Budapest, Singapore). The soft at a low-stress circuit (C3 at Monza) is a harder compound than the soft at a high-stress circuit (C5 at Singapore).
The hard compound at any circuit typically lasts 30 to 40 laps without significant degradation on a 55-60 lap race. The soft typically lasts 15 to 25 laps. The medium sits between these ranges. Exact figures depend on circuit abrasiveness, temperature, and car set-up.
Teams brief their strategy publicly in vague terms (they say 'one stop' or 'two stop') but do not confirm specific compound sequences until after the race starts. From the timing screens and the F1 app during the race, you can read which compound each driver is currently using.
The undercut: pitting early to gain positions
An undercut works when fresh tyres are significantly faster than the degraded tyres of the car ahead. The calculation: if a car can gain more than the time it loses in the pit stop, the undercut is viable.
Typical time lost in a pit stop during racing laps: 18 to 22 seconds. For the undercut to work, the fresh-tyre advantage must offset this within the laps before the leading car also pits. If a driver is lapping 0.5 seconds faster per lap on fresh tyres, they need 36 to 44 laps to make up a 22-second pit stop loss. In practice, undercuts work because fresh tyres provide more than 0.5 seconds advantage in the first 5 to 10 laps.
From the grandstand, a successful undercut is visible as a car that emerged from the pits behind its rival but is now closing on it rapidly. Watch the INT column after the stop: if the gap between the two cars falls by 0.5 seconds or more per lap for three consecutive laps, the undercut is working.
Tyre degradation from the grandstand tells you which car is most vulnerable to an undercut. A driver with yellow S3 sectors is on ageing tyres and a prime target.
How to Spot Tyre Degradation from the GrandstandThe overcut: staying out to keep position
The overcut is less common than the undercut and requires specific conditions. It works when a car can lap faster in clear air than the car that just pitted, such that it retains its position when it eventually stops.
The key condition for an overcut: the car pitting must rejoin in traffic, which slows its first laps on fresh tyres. If the pitting car emerges behind slower backmarkers and cannot use its tyre advantage immediately, the car that stayed out can extend its lead and pit later while maintaining position.
Overcuts also work when the soft tyre takes several laps to reach operating temperature (common in cool conditions or at high-altitude circuits). A car on degrading mediums can sometimes lap faster in laps 30 to 35 than a car on soft tyres that have not reached their temperature window.
How to identify undercut or overcut attempts from the grandstand
The setup: two cars within 2 to 3 seconds of each other. One of them pits. The remaining car extends its stint. This is the classic undercut/overcut setup.
Undercut attempt signal: the pitting car was behind its rival but close. After the stop, the INT for the rival (now ahead on older tyres) is closing rapidly. If the gap falls from 8 seconds to 4 seconds to 2 seconds in consecutive laps, the undercut is likely to succeed when the rival eventually pits.
Overcut attempt signal: a car that was behind its rival does not pit when the rival does. Its INT to the car that pitted drops (because it is now running in clean air on a long stint) but then the car pits later and the gap is reassessed. If the overcut car rejoins still ahead after its later stop, the overcut worked.
2026 Technical Series
Frequently asked questions
- What is an undercut in F1?
- An undercut is a pit stop strategy where a driver pits before the car ahead to get fresh tyres earlier. The fresh tyre advantage allows them to lap faster, closing the gap to the car ahead that is now on older tyres. If the pace advantage is large enough, the pitting car can rejoin ahead of the rival after that rival eventually pits.
- What is an overcut in F1?
- An overcut is when a driver stays out longer than their rival to gain an advantage through track position. The staying-out car runs in clear air on a long stint, then pits later. The overcut works if the car can maintain enough pace to hold its position advantage until the later stop.
- What are the F1 tyre compound names in 2026?
- Pirelli has five dry-weather compounds numbered C1 to C5 (hardest to softest). For each circuit, three are nominated and labelled hard, medium, and soft. The actual C-number of the hard, medium, or soft varies by circuit depending on expected tyre stress and temperature. Pirelli announces the nominated compounds at least six weeks before each race.
- How many pit stops does an F1 car need to make in a race?
- At least one, unless the race is run partly or fully in wet conditions. FIA regulations require each driver to use at least two different dry-weather compounds during a dry race. This means a minimum of one pit stop. Teams that run a strategic one-stop will use two different compounds. Two-stop strategies use three compounds or the same compound twice.
- Why do teams choose different compounds at the start of the race?
- Different compounds allow different strategic paths. A car starting on soft tyres can run a fast early stint but must stop earlier. A car starting on mediums can run longer before the first stop. Starting on hard tyres is rare in dry conditions as the initial pace deficit is too large to recover from in most race scenarios. The Q2 tyre rule forces some cars' compound choice at the race start.
Pirelli C1-C5 compound range per Pirelli 2026 F1 technical specifications. Circuit compound nominations sourced from Pirelli pre-event technical notes. Undercut and overcut timing mechanics consistent with published F1 strategy analysis from multiple teams and analysts. Minimum two-compound rule per FIA 2026 Sporting Regulations Article 24.4.
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