Cadillac confirmed that it used simulation tires during the initial development of its 2026 car, a technical decision that highlights regulatory limits and the challenge of integrating into Formula 1.
Even before its car officially lines up on the grid, Cadillac is already facing the first technical debate of its 2026 project. The American brand confirmed that during the early stages of development, it worked with “fake” or simulated-spec tires in order to move forward with the car’s design.
This clarification does not imply any regulatory wrongdoing. Since Cadillac is not yet an active full-time team on track, it did not have direct access to the real compounds supplied by Pirelli. In that context, the technical structure had to rely on digital models and alternative references to build its aerodynamic foundation.
The use of simulation tires reflects a logical limitation within the regulatory framework. Without official participation in races or authorized tests, the team could not validate its work with the definitive tires, a factor that conditions key aspects such as balance, ride height, and cornering behavior.
In Formula 1, the tire is not an accessory element. It is a structural part of performance. Dimensions, lateral stiffness, and the thermal window directly influence suspension setup, aerodynamic load, and weight distribution. Working without the real compound forces teams to make estimates.
Cadillac explained that its methodology included advanced simulations and comparative historical data to minimize the gap between theory and reality. The goal was to build a package as close as possible to the competitive scenario, even knowing that definitive validation will come once the car runs with official tires.
The challenge is twofold. Not only must they integrate into a category with new regulations in 2026, but they must do so with a more limited information margin than established structures. In that sense, every technical decision becomes even more significant.
Developing a modern Formula 1 car demands precise correlation between wind tunnel work, CFD, and dynamic behavior. Without the definitive tire as a physical reference, engineering teams must anticipate variations that could alter the car’s overall balance.
Cadillac assumes the real test will begin when the car faces actual track running. That will measure how accurate its projections were and how effective the prior work with virtual data truly was.
This public admission, rather than weakening the project, provides context about the conditions under which this new structure is being built. Starting from scratch in Formula 1 means managing limitations and adapting quickly.
With 2026 on the horizon, Cadillac continues refining its technical package. The use of simulation tires was a necessary stage within a broader process aimed at reducing uncertainty and arriving at its debut with a solid and coherent foundation.