Japanese Grand Prix: Five teams have made changes to their single-seaters

Five teams have introduced technical updates for the 2025 Japanese Grand Prix. Red Bull Racing, Sauber, Williams, Haas, and Racing Bulls have all modified their cars for this third race of the season. Let’s take a closer look at the improvements each team has made to their single-seater.

Red Bull: Aerodynamic Precision and Thermal Management

Red Bull Racing arrives in Suzuka with the most significant set of updates. Three developments have been integrated into the RB21. The first concerns the engine cover, with an adjustment of the aspect ratio of the central outlet to reduce aerodynamic losses caused by the rear wings, while improving cooling. The second development is at the rear exhaust ducts, now widened and equipped with sealing options, an early preparation for the Suzuka specifications. Finally, the rear suspension has been reworked, with a new shape for the lower arm fairings to better adapt to local flows and improve aerodynamics around the brakes.

Sauber: optimized floor and rear wing

For the first race under the direction of their new team principal Jonathan Wheatley, Sauber has made several modifications to their car. The floor has been revised, particularly around the side skirts, the outer part, and the diffuser, to improve airflow under the vehicle. The rear wing has also been modified for increased efficiency, while an additional element has been added to the beam wing, increasing aerodynamic load without compromising stability.

Williams: New Front Wing for Better Balance

Williams focused his efforts on the front wing. The outer part of the rear flap has been extended and reprofiled, with a more pronounced dip in its profile. This change generates increased local load, allowing better distribution of downforce between the front and rear of the car. The wing endplate has also been adjusted to optimize the interaction between the flow exiting the wing and the aerodynamic elements downstream.

Racing Bulls: the Halo integrated into aerodynamics

The Racing Bulls team has redesigned the fairing of its roll hoop and its interface with the chassis. The idea is to better direct the airflow passing over the structure so that it interacts more effectively with the rear wing and the floor. This modification should improve the quality of the airflow at the rear of the car.

Haas: Enhanced Stability at Low Altitude

Haas has chosen to modify the floor of its single-seater by reworking its central geometry. The goal is to improve stability in high-speed corners, especially when the car is running close to the ground. This development aims particularly to optimize aerodynamic downforce in these critical conditions.

No updates for the other teams.

Ferrari, McLaren, Mercedes, Aston Martin, and Alpine did not bring any new parts for this race. These teams preferred to keep their current configurations for the Suzuka circuit.

The technical Japanese track will be a good test to evaluate the effectiveness of these updates. Indeed, the weekend’s results will show if the teams that have invested in these innovations will gain a competitive advantage on the track.