With the arrival of the new Formula 1 regulations, the focus on chasing minimum weight has been pushed to the extreme, turning it into one of the key battlegrounds ahead of the 2026 season. Having a lightweight car will be doubly important, both in terms of outright performance and for the implications it carries for energy management. As a result, chassis design has become a particularly demanding task for the teams, further complicated by the new homologation criteria introduced by the FIA.
Weight, a double importance
One of the objectives shared by both the FIA and the teams when drafting the new regulations was to reverse the trend of recent years, which had seen the minimum weight steadily increase. For 2026, the minimum weight has been reduced to 724 kg in race trim and 726 kg in qualifying configuration, excluding the mass of the tyres. Considering that a full set of tyres weighs 46.4 kg, the total running weight reaches around 770 kg, approximately 30 kg less than the 800 kg minimum of the 2025 cars.
Shedding this amount of weight is far from straightforward for the teams, despite the fact that the new cars are physically smaller. The wheelbase has been shortened from 3.6 to 3.4 metres, while overall width has been reduced from 2.0 to 1.9 metres. The power unit alone weighs 185 kg, representing an increase of as much as 34 kg, mainly due to the hybrid system, which is three times more powerful than the previous one. As a result, teams are trying to find ways to reduce the rest of the car by around 64 kg compared to 2025, a development effort that is still ongoing.
Reaching the minimum weight is anything but guaranteed, even less so than it was in 2022. Back then, Alfa Romeo-Sauber were among the most virtuous teams in this area, enjoying a noticeable early advantage over their midfield rivals, which gradually faded over time. Under the previous regulations, it was estimated that saving 3 kg could be worth around one tenth of a second per lap. In 2026, however, the benefits of a lighter car extend well beyond pure performance in terms of acceleration, braking and cornering speed.
A lighter car is also less demanding in terms of fuel consumption and electrical energy usage. It requires less battery management and can therefore deploy high power for longer periods. This makes weight reduction a crucial factor not only for lap time, but also for race efficiency and strategic flexibility.
The chassis battle
The real challenge lies in deciding where weight can be removed while striking the right compromise with the various aspects of performance. Factors such as chassis stiffness and the importance of certain aerodynamic surfaces must be carefully balanced. Priority is given to reducing the mass of rotating components such as brake discs, wheel rims and transmission parts, in order to lower rotational inertia.
Equally critical are the unsprung masses of the wheel assemblies, as these act directly on the tyres without the filtering effect of the suspension. Reducing weight in these areas can deliver significant benefits in terms of grip, tyre wear and overall vehicle dynamics.
It is telling that teams have chosen not to exploit the regulatory allowance to design larger and thicker brake discs. This was already confirmed during the summer by Andrea Algeri, Head of F1 Clients at Brembo Racing: “From what we are seeing, practically no one is developing discs at the maximum dimensions as happened in the past. In 2026 the search for minimum weight will be obsessive. Everyone is trying to have a braking system that is sufficiently performant in terms of torque and cooling, but at the same time as light as possible.”
Further complicating matters are the new chassis crash tests, which are more severe than in the past and work against weight reduction. One example is the introduction of a second nose impact test, which requires an initial lateral load to cause failure in a specific area of the nose, followed by an additional impact test.
“If seen ‘naked’, the chassis will look similar to the current one. In reality, however, the FIA homologation criteria will change a lot,” warned Haas technical director Andrea De Zordo in an interview with The Tech Formula. “For safety reasons, the strength of the survival cell will have to be verified in more load scenarios and with more intense forces. Building the chassis will be very challenging. I am convinced that all teams are struggling to homologate it, much more than in the past.”
Watch the packaging
Another key aspect of chassis design concerns the installation of components beneath the bodywork. “In 2026, the integration between the chassis and the power unit will be more important than ever,” Adrian Newey already underlined back in October 2024. Installing the engine in a way that optimises aerodynamics, centre of gravity and weight distribution is a practice that has been refined for over half a century.
Among the many historical examples, one can think of the Ferrari 312B from 1970, whose flat engine layout aimed to lower mass and reduce aerodynamic drag, or more recently the 2011 Red Bull, on which Adrian Newey and Rob Marshall installed the KERS battery in the gearbox area to taper the bodywork.
In 2026, power unit packaging becomes even more critical. Shorter and narrower cars reduce the available space for installing the power unit and its auxiliary components, while battery dimensions increase significantly, as it is required to deliver 350 kW of power compared to the previous 120 kW. The regulations also impose strict prescriptions, such as requiring the electric motor to be anchored to the survival cell.
From an aerodynamic perspective, reducing drag is a priority in order to lower consumption and minimise energy management. Some teams are even willing to run the engine at higher temperatures and sacrifice a few horsepower in order to use smaller radiators. Optimising power unit installation is therefore crucial for efficiency, as it allows greater freedom in bodywork design.
The bodywork also plays a key role in managing the turbulence generated by the front wheels, which are now closer to the floor as a consequence of the shorter wheelbase. Even more than with ground-effect cars, daring chassis shapes can therefore make a decisive difference.
Same suspensions, different task
The shape of the survival cell also influences suspension choices. It remains to be seen whether the dualism between push-rod and pull-rod layouts will reappear at both the front and rear. As with the previous regulations, there is no absolute superiority of one kinematic solution over the other, as effectiveness depends on the overall car concept and the compromise between aerodynamics and vehicle dynamics.
It is interesting to note that one of the latest versions of the regulations explicitly bans anchoring the rear suspension to the power unit, a solution that someone was clearly studying during the design phase.
As for internal components, the rules remain the same as in the last regulatory cycle. Inerters, mass dampers, gas springs and acceleration-sensitive valves are still forbidden, meaning that the mechanical architecture is largely inherited from the previous generation of cars. What does change, however, is the way the suspensions are required to work.
Without ground effect, there is no longer a need to run the car extremely low and stiff. The new Formula 1 cars will return to higher ride heights, allowing for softer mechanical settings that are also useful for managing balance. Ultimately, nothing beats ballast when it comes to fine-tuning weight distribution, but ballast cannot be used until the minimum weight has been reached, further encouraging teams to invest heavily in maximum lightness.
Leave a Reply