F1’s next revolution might be hiding where you least expect it: behind the rear wheels.
With 2026’s all-new chassis and power unit rules looming, teams are deep into designs that will lean harder than ever on hybrid deployment. The MGU-H is being binned as part of the reset, but regeneration via the MGU-K stays — and it’s pushing brake design into some wild territory.
Brembo’s Andrea Algeri has had an early peek at what teams want from their suppliers, and the picture’s stark. “In the rear axle, we have seen extreme choices in the sense of disc dimension,” Brembo’s F1 customer manager told The Race. “They are very small, compared to the current ones in terms of diameter, but also in thickness. So it means that they believe that on the rear axle they are basically not braking at all or only in a few cases.”
That’s the hybrid era in a nutshell: let the MGU-K do the heavy lifting. The 2026 technical regs still mandate a minimum braking hardware capability — each rear wheel must be able to deliver -2500Nm of torque without help from other systems — but there’s freedom in how much that hardware is actually used. As Algeri put it: “What we are expecting is that the brakes will not be used at all in some corners because the braking is done with other systems. Then, on the other side, there will be some corners where they are very, very stressed. So you have to be prepared to face this wide range.”
That “wide range” is the headache. Rear axle architecture in 2026 will be inseparable from each team’s power unit layout and energy recovery strategy. Brembo gets the targets — braking torque, dimensions, operating windows — but not always the why. “We have seen different approaches across the teams,” Algeri said. “It’s mainly on the rear… we are a bit blind in this sense. But we have received a target from the teams and it says, ‘OK we want to go with this kind of braking torque, so we would like to have this kind of dimension. So let’s design the best possible braking system within these limits’.”
Some of those briefs are out on the edge. “We have seen some outliers that will be very clever solutions if they are right. Otherwise, they will have to redo the braking system after a few tests or a few races! We are trying to be prepared in this case. But it’s pretty curious, and it’s for sure a new challenge after many years.”
F1’s last big hybrid step in 2014 already reshaped rear braking — and when the hybrid side goes wrong, it can be game over. In 2026, the stakes rise again. The rear pedal feel drivers talk about? It’ll be as much software map as metal disc. And the margin between genius and a long night of rework at the factory could be measured in millimetres.
