Red Bull approached FIA over latest McLaren F...

Red Bull Questions FIA Over McLaren’s Innovative F1 Brake Cooling System

The Formula 1 paddock is once again at the center of intrigue following new technical directives issued by the FIA just ahead of the Emilia Romagna Grand Prix. These directives, which concern regulations related to tire temperature control and wheel bodywork design, were reportedly prompted by concerns raised by Red Bull Racing. The reigning champions had been closely observing McLaren’s recent rise in performance and suspected a particular innovation might be giving their rivals a competitive edge.

McLaren has enjoyed a strong start to the 2025 F1 season, securing five wins in the first six races, a streak that has brought increased scrutiny to their technical approach. One key area of focus has been their brake and tire cooling systems, which are believed to play a critical role in managing tire temperatures during races. Red Bull, using thermal imaging technology, noticed unusual heat signatures from McLaren’s brake drums. This led them to believe that McLaren might be employing a cutting-edge solution involving phase-changing materials (PCMs) embedded within the brake system.

These PCMs have the ability to absorb and release heat as they change states—solid to liquid and back—effectively regulating brake temperatures more efficiently. Maintaining optimal brake and tire temperatures can significantly improve tire performance and durability, potentially offering a strategic advantage, especially in races with high thermal demands.

Red Bull’s suspicions were conveyed to the FIA, prompting the governing body to issue clarifications regarding the legality of such systems. While these directives did not single out McLaren by name, it was widely understood in the paddock which team had triggered the scrutiny.

McLaren has publicly stated that they were not forced to make any changes to their setup as a result of the FIA’s clarifications. However, their performance at Imola has led to speculation. Max Verstappen claimed victory for Red Bull, and observers noted a possible drop in McLaren’s competitiveness, though it’s unclear whether this was due to the technical directives or simply the nature of the Imola circuit, which historically suits Red Bull’s strengths. Additionally, Red Bull introduced a series of upgrades at the same event, which may have contributed to their return to the top step of the podium.

The next race in Monaco, a circuit with very different demands, will offer a better picture of whether McLaren’s pace has genuinely been impacted. Moreover, another technical directive targeting flexible front wings is set to be enforced at the Spanish Grand Prix, potentially reshuffling the competitive order once again.

In Formula 1, such regulatory clarifications are not unusual. Teams regularly consult with the FIA for clarity when they observe novel interpretations of the rules by rivals. Red Bull’s move is just the latest example of a team seeking to ensure a level playing field while also subtly disrupting a competitor’s momentum.

As the 2025 season progresses, all eyes will be on McLaren to see if they can maintain their early-season form or if FIA’s technical intervention has altered the dynamics at the front of the grid. One thing is certain: the technical chess match in F1 continues to be as fascinating as the on-track battles.