Gary Anderson analyses early 2026 concepts and explains why 2026 F1 aerodynamics could challenge the FIA’s vision of closer racing
Few figures command as much technical respect in the Formula One paddock as Gary Anderson. When he raises a red flag, people listen. As teams begin to peel back the covers on their 2026 machinery, Anderson has spotted a familiar idea returning in unfamiliar form. It is subtle, clever, and potentially disruptive. More importantly, it hints that the sport may already be drifting toward the grey areas that have defined every major regulation reset in modern F1.
At the centre of the debate is an enlarged opening at the rear of the floor, once nicknamed the mousehole. In its current form, it is larger, more aggressive, and far more influential. The location of this opening, sitting deep into the diffuser region, suggests teams are chasing airflow stability rather than outright peak downforce. That distinction matters. Stability is what allows drivers to follow closely, push harder, and trust the car in turbulent air.
On paper, removing floor area near the diffuser should hurt performance. In reality, the airflow story is more complex. The opening works alongside the inner brake duct surfaces, which are carefully shaped to manage the wake coming off the front of the rear tyre. This region is notoriously messy. If left uncontrolled, it can trigger airflow separation and collapse diffuser efficiency in an instant.
Mercedes appears to have leaned heavily into this philosophy during early running. Their solution focuses on guiding airflow around the inner face of the tyre and into a low pressure zone created as the tyre lifts away from the track surface. Small internal splitters and subtle ducting features help redirect that energy. The aim is simple. Keep the diffuser working across a wider range of conditions.
Floor louvres add another layer to the picture. By allowing air to pass from the upper surface into the underfloor region, teams can better connect tyre induced airflow with the low pressure beneath the car. When done well, this improves sealing along the floor edge. It also reduces sensitivity when following another car. That is the theory at least.
Mercedes has even introduced a compact wing like element above the floor to reinforce outward airflow. It is a reminder that innovation never stops in Formula One. Even tightly written rules leave room for interpretation. That creativity is part of the sport’s DNA. It is also where regulatory intent can begin to blur.
Anderson’s concern is timing. The 2026 regulations were designed to improve racing quality. Easier following was a central objective. If these floor openings evolve unchecked, they could restore some of the aerodynamic robustness that made previous generations difficult to race closely. That is why Anderson believes the FIA should act now, not after performance gaps have already opened.
The Barcelona shakedown offered early clues. Mercedes logged extensive mileage. Ferrari topped the timing sheets. New manufacturers Audi and Cadillac quietly gathered vital data. Red Bull endured mixed fortunes in tricky conditions. Beneath those headlines, technical teams were already studying each other’s floors in detail. Everyone knows where the real lap time may come from.
This is not panic. It is vigilance. Regulation cycles are won and lost in the opening months. The direction set now will define development paths for years. Whether the FIA intervenes or allows this trend to mature will shape how teams exploit 2026 F1 aerodynamics moving forward. As Anderson’s warning suggests, the smallest openings can sometimes lead to the biggest consequences.
