FIA proposes rule tweak that could strip Red Bull's aerodynamic edge for 2027

The governing body for Formula 1 is preparing a rule change that would reduce the maximum thickness of the floor-support element on the car’s under-tray from 20 mm to just 5 mm. Red Bull Racing currently uses a specially shaped cable along the lower edge of the side-pod to gain aerodynamic advantage, a solution that complies with the existing 20 mm minimum radius requirement. The new limit would eliminate that advantage, compelling Red Bull to redesign a component that has contributed to recent victories, including Max Verstappen’s wins in Bahrain and Singapore.

Audi, which has adopted the same concept for its own chassis, would also need to adjust its design. The move follows calls from drivers such as Lewis Hamilton for broader regulatory reforms after his Bahrain “revelation.” Experts note that the floor-edge geometry is crucial for airflow, but the rule already imposes a minimum curvature radius. Until the amendment is ratified, both teams can continue using one outlet setup for the 2026 season.