McLaren Cleared by FIA Over Tyre-Cooling Allegations Following Miami Grand Prix
The Fédération Internationale de l’Automobile (FIA) has officially cleared McLaren of any wrongdoing concerning allegations of using illegal methods to cool their tyres during the Miami Grand Prix. This decision comes after intense scrutiny from rival teams, particularly Red Bull, who suspected McLaren of injecting water into their tyres to maintain optimal temperatures. The FIA’s comprehensive inspection found no evidence supporting these claims, affirming that McLaren’s practices are within the regulatory framework .
The investigation was prompted by McLaren’s dominant performance in the early stages of the 2025 season, securing five victories in the first six races. Oscar Piastri’s win in Miami, where he led a McLaren one-two finish, intensified suspicions about the team’s tyre management strategies. Post-race, the FIA conducted a detailed examination of Piastri’s MCL39, focusing on the brake system and tyre cooling mechanisms. The findings confirmed that McLaren’s car complied with all technical regulations, including Article 11.5, which prohibits liquid cooling of brakes .
Speculation about McLaren’s competitive edge has centered on their innovative use of phase-change materials (PCMs) in the brake drum design. These materials can absorb and release heat at specific temperatures, potentially stabilizing tyre temperatures during races. While this theory has not been officially confirmed, it highlights McLaren’s commitment to technological advancement within the sport’s regulations .
In response to the allegations, McLaren CEO Zak Brown dismissed the claims as unfounded and called for a more formal process for lodging technical protests. He suggested that teams should be required to submit formal documentation and financial deposits when making such allegations, to prevent baseless accusations from disrupting the sport .
Support for McLaren’s integrity came from Mercedes team principal Toto Wolff, who acknowledged the team’s superior tyre management and innovative approach. Wolff emphasized that McLaren’s success is a result of legitimate engineering advancements rather than any breach of regulations .
With the FIA’s clearance, McLaren can continue their season without the cloud of controversy. Their focus now shifts to maintaining their competitive momentum as the championship progresses, with the next challenge being the Emilia Romagna Grand Prix.