RB21 in white livery with rear-end upgrades for the 2025 Japanese GP

F1 Tech Updates for Japanese GP 2025

Red Bull and Haas headline the technical upgrades at the Formula 1 Japanese Grand Prix! Discover the suspension tweaks from Red Bull, Haas's new floor, and updates from Racing Bulls, Williams, and Stake.

Published on 04 Apr 2025

Red Bull Racing Fine-Tunes Suspension for Performance Gains

Red Bull Racing is aiming to further solidify their early-season advantage with a performance-focused upgrade. The team has implemented a subtle but potentially impactful revision to their rear suspension. Specifically, they've tweaked the lower wishbone shroud and its fairing where it integrates into the rear wheel bodywork. This modification is designed to optimize airflow around the crucial rear brake duct area, potentially leading to improved aerodynamic efficiency and downforce.

Additionally, Red Bull has brought adaptations to their engine cover and rear brake exit ducts. While these changes include blanking options specifically tailored for the cooler temperatures expected at Suzuka, the team indicates that these modifications are also strategically aimed at maximizing performance in the upcoming races in Bahrain and Saudi Arabia.

3 technical updates on the Red Bull Racing RB21 at the 2025 Japanese GP

Haas Introduces Significant Floor Upgrade at Toyota's Home Race

The Haas F1 Team has arrived at the Japanese Grand Prix, the home race of their new technical partner Toyota, with a substantial update. The American outfit has introduced a completely new floor for their VF-25 challenger. The primary focus of this redesign lies in reshaping the central section of the floor.

Haas engineers are targeting improved stability, particularly when the car is operating at low ride heights through high-speed corners. The team believes this new floor specification will allow them to exploit lower ride heights more effectively, similar to the performance gains they experienced with their previous floor on the smoother circuit in China, where they secured a valuable double points finish.

1 technical update on the Haas VF-25 at the 2025 Japanese GP

Other Teams Bring Targeted Updates to Suzuka

Racing Bulls

The Faenza-based squad has updated its Halo shroud. This modification is intended to positively influence the performance of both the rear wing and the airflow downstream towards the floor.

1 technical update on the Racing Bulls VCARB 02 at the 2025 Japanese GP

Williams

The Grove-based team has brought a new front wing to Suzuka. The updated front wing flap and endplate are designed to work in conjunction to provide improved control over the turbulent wake generated by the front wheels.

2 technical updates on the Williams FW47 at the 2025 Japanese GP

Stake F1 Team

Formerly finishing tenth in the constructors' championship, Stake has introduced a comprehensive set of new components for what marks the first race weekend under their new team principal, Jonathan Wheatley. Similar to Haas, Stake features a new floor with upgrades to the floor fences, outboard floor, and diffuser.

They have also introduced a fresh rear wing designed to increase overall efficiency and improve the aerodynamic cleanliness of the rear wing assembly.

Furthermore, Stake has added an upper element to their existing beam wing, aiming to increase overall downforce.

2 technical updates on the Kick Sauber C45 at the 2025 Japanese GP

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