When designing the MCL39, dynamic performance and tire management played a crucial role in the car’s development. Particular attention was given to the front end, with an extreme application of the anti-dive concept and a significant evolution of the brake duct design.
Since the Silverstone shakedown, a new brake duct geometry had been noticeable, featuring increased dimensions to direct more airflow toward the brake drums. The goal? To improve thermal management of the wheel rim and, consequently, the tire.
McLaren’s excellent—if not nearly perfect—tire management in Australia confirmed the outstanding work done by the team’s engineers on vehicle dynamics and thermal control.
A technical detail hidden until Australia
In Bahrain, McLaren had already sparked curiosity in the pit lane, as the team’s technicians were particularly secretive about what lay beneath the brake drums. Only in Australia did the team finally reveal the updates, causing quite a stir.
What emerged was an extreme refinement of aerodynamics in the area beneath the front brake drums. From images and technical renderings, it is evident that the team reworked last year’s concept, completely overhauling the original layout and reorganizing airflow management under the drum.
The primary objective was to evenly distribute heat across the entire surface of the brake drum. To achieve this, McLaren increased the size of the brake duct to enhance airflow inside the wheel and developed a design that allows heat to dissipate outward.
But the innovation goes beyond cooling. The newly designed ducts not only optimize cooling for the brake disc and caliper but also impact tire thermal management. Heat generated by the braking system inevitably dissipates into the surrounding environment, and since the brake drums are in contact with the tires, excessive temperatures could compromise tire performance due to heat transfer.
A difficult advantage to replicate
It’s also worth noting that McLaren has been using carbon fiber for this component since last season—a choice that ensures lower thermal conductivity and reduced weight.
Rival teams should be on high alert: if this solution proves effective, it will be nearly impossible to replicate in the short term, given the current time and budget constraints imposed by regulations.
Temperature management appears to be a top priority for McLaren this season, and their highly competitive race pace in Melbourne was clear evidence of that. Further confirmation will be needed, but tire durability and management seem to be one of the team’s many strengths.
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