Formula 1 to Drop Softest Tyre Compound in 2026 Regulation Changes
Pirelli has finalized its tyre compound range for the 2026 Formula 1 season, announcing that the C6 – the series’ softest tyre – will not return. The decision follows extensive analysis of testing data, including a recent session in Mexico City, designed to prepare for the sweeping regulatory changes coming in 2026.
The tyre manufacturer has been meticulously developing its compounds using performance forecasts provided by the F1 teams. These forecasts, based on simulations, predict the anticipated loads and speeds of the next-generation cars.
In 2026, teams will have access to five dry tyre compounds, ranging from the durable C1 to the grippiest C5. The now-discontinued C6 was introduced earlier this year at Imola, with subsequent appearances at Monaco, Montreal, and Baku, in an attempt to introduce greater strategic flexibility into races.
“Particular attention has been paid to performance differences between the compounds in terms of laptime, so as to ensure a wide and consistent delta between them, to deliver more strategy options,” a senior official stated. The decision to eliminate the C6 stemmed from an inability to achieve the desired performance gap between it and the C5.
According to a company release, data from recent Pirelli tests revealed that the performance difference between the C5 and C6 compounds was simply too marginal compared to the other available options. This lack of a significant performance delta would have limited the strategic possibilities for teams during races.
To further refine the 2026 tyre range, Pirelli will conduct a one-day test on the Tuesday following the Abu Dhabi Grand Prix. All ten F1 teams will participate, with current race drivers piloting “mule cars” – existing F1 cars modified to simulate the downforce levels expected in 2026. Young drivers will also be present, testing the 2025 cars with the current tyre specifications.
This final testing phase is crucial to ensuring that the chosen tyre compounds deliver the desired performance characteristics and strategic options when the new regulations come into effect. The goal is to provide a range of tyres that encourage varied race strategies and enhance the spectacle of Formula 1.
