The 2025 Miami Grand Prix has become a lightning rod for controversy after sensational allegations surfaced that McLaren may have used an undisclosed method to cool its tyres — a trick that, if proven, would breach F1’s strict technical regulations.
Red Bull, McLaren’s main rival in the championship fight, has long harbored suspicions that McLaren is using water cooling techniques to enhance tyre performance, especially during qualifying. However, despite the heated accusations, no formal evidence has been submitted, and McLaren has publicly challenged Red Bull to “put up or shut up” by lodging an official protest.
In a rare move, Pirelli’s Motorsport Director, Mario Isola, has broken his silence on the matter, addressing the speculation that has rocked the paddock. Speaking to reporters after the race, Isola firmly dismissed the possibility of water being secretly injected into the tyres without detection.
“We monitor tyre pressure and temperatures constantly through sensors,” Isola explained. “Forcing water through the valve or any part of the tyre would be immediately visible in the data. It’s not just highly unlikely — it’s almost impossible under the current FIA monitoring system.”
The debate has escalated to the point where FIA President Mohammed Ben Sulayem weighed in, expressing support for McLaren CEO Zak Brown’s proposal that formal protests should come with financial consequences. Ben Sulayem stated: “If a team believes they have a legitimate claim, they should protest — but there should be accountability. I agree with Zak that if you lodge a protest, the cost should come out of your cost cap, and you only get it back if you’re proven right.”
With tensions high between Red Bull and McLaren, all eyes now turn to the next round, where the FIA’s scrutiny over tyre procedures is expected to tighten even further. As the title battle intensifies, the spotlight will remain firmly on the pit lane — and on Pirelli’s tyres.
