TECH REVIEW: How has McLaren upgraded its 2026 car so far?

The opening phase of the 2026 Formula One season has been shaped by unusual circumstances. With the Bahrain and Saudi Arabian Grands Prix cancelled, the championship completed only three races — Australia, China, and Japan — before entering a five‑week hiatus ahead of the Miami Grand Prix.

Despite the disrupted schedule, the early races have already revealed how teams are interpreting the radically revised 2026 technical regulations. Among them, McLaren stands out for taking a measured, stability‑first approach, introducing a single upgrade package in Australia and electing not to submit any updates for China or Japan.

This strategy suggests that McLaren entered the season with a well‑defined aerodynamic concept for the MCL40, one that the team preferred to validate across multiple circuits before committing to further development. The Australian package therefore represents the foundation of McLaren’s 2026 aerodynamic philosophy.

McLaren’s Australian Grand Prix update package consisted of three components: a revised floor, an updated rear suspension fairing, and a new rear wing. All three updates were aimed at improving flow conditioning and local load generation, two areas that have become increasingly important under the 2026 regulations.

The floor update introduced a new floor‑edge geometry designed to improve flow control around the rear tyres. With the 2026 rules reducing the authority of the underfloor and simplifying the floor edge, teams must now rely more heavily on subtle shaping to stabilise the wake produced by the rotating rear wheels.

McLaren’s revised geometry aims to deliver cleaner, more predictable airflow into the diffuser region, thereby improving both floor load and rear‑corner aerodynamic performance. This is a crucial area of development in 2026, as the simplified underbody places greater emphasis on how effectively teams can manage the tyre wake.

The second update focused on the rear suspension fairing. McLaren introduced a new fairing around the suspension mounting points, reshaping the surfaces that guide airflow toward the rear impact structure and diffuser.

This refinement is designed to reduce turbulence and improve the quality of airflow feeding the diffuser’s upper surfaces. Under the 2026 regulations, where the diffuser plays a less dominant role than in the ground‑effect era, optimising the airflow around the rear suspension becomes even more important for maintaining aerodynamic stability and extracting consistent downforce.

The final component of the Australian package was a new rear wing featuring revised mainplane and flap geometries. The update aims to generate additional aerodynamic load across all conditions while maintaining efficiency — a critical balance under the 2026 rules, which place greater emphasis on upper‑body aerodynamics due to the simplified underfloor.

The new wing likely reflects McLaren’s interpretation of the 2026 Sustainable Mode (SM) system, which influences how teams design their active aerodynamic elements. By refining the mainplane and flap interaction, McLaren is seeking to maximise load in standard race trim while ensuring the wing remains effective and stable when SM mode is deployed.

McLaren did not submit any upgrades for the Chinese or Japanese Grands Prix. This absence of updates is notable but not necessarily surprising. With the 2026 regulations representing a fundamental shift in aerodynamic philosophy, many teams are choosing to gather extensive correlation data before committing to further development.