The downforce simulations supplied to Pirelli are not particularly meaningful when it comes to predicting the true competitiveness of the 2026 Formula 1 cars. As the current season approaches its conclusion, the attention of the entire paddock is shifting more and more toward the major rules overhaul coming in 2026. Yet the performance of both the chassis and the power units remains one of the biggest unknowns ahead of the new era.
At first, several technical directors insisted that the upcoming ruleset was extremely restrictive. Adrian Newey, however, later expressed a different view after a more thorough analysis, suggesting that the regulations were not as limiting as originally thought. This divergence of opinion is also reflected in the first sets of predictions shared by the teams. According to Brembo, for example, there will be significant changes to the size of the rear brake discs, while Pirelli has revealed notable discrepancies in the aerodynamic load levels forecast by the various teams.
How will these differences affect performance?
Pirelli receives projected aerodynamic load figures from every team at the end of the previous season. This information is used to estimate the loads that the new tyres will have to withstand and to guide the development of both the compounds and the tyre structure.
As Mario Isola explained to Motorsport.com, the initial predictions for 2026 have already changed quite dramatically. However, this does not automatically mean that the competitive order will be heavily spread out. He clarified that these simulations only reflect what the teams expect their cars to generate, not their actual on-track performance. Mario Isola also emphasised that a car showing more load at the front or at the rear in simulations does not necessarily mean it will be faster. Aerodynamic drag levels and several additional factors also play a decisive role.
He then joked that he already knew next year’s champion, saying: “Fundamentally, I can already tell you who will win next year! But unfortunately it doesn’t work that way or, perhaps I should say, luckily it doesn’t!”
Can Pirelli rely on the simulations to develop the 2026 compounds?
The unpredictability of the data makes Pirelli’s job particularly complicated—not so much in the development phase itself but in defining the compounds, which depend directly on energy and load levels. The teams are struggling to provide simulations that are both consistent and reliable, yet the sole tyre supplier needs precise information. Without it, there is a risk of creating tyres that perform perfectly at the start of the season but fail to cope with demands later on. In such cases, it would be necessary to significantly increase the minimum tyre pressures to help the structure withstand the loads. For this reason, Pirelli designs the tyres based on the expected loads for the end of the season.
Pirelli expects that the values supplied by the teams will converge more closely in the next round of simulations, just as happened when the 18-inch tyres were introduced. Although the tyres will already be homologated by then, those updated figures will still be used to select the compounds for each Grand Prix on the calendar.
The Italian manufacturer’s ultimate goal is to widen the operating range of the 2026 compounds. This would give Pirelli more freedom when assigning tyres for every race weekend and allow teams to manage strategy with greater flexibility.
Leave a Reply