McLaren admits 2026 car has lost 2025 tyre management advantage

The 2026 regulation reset has cost McLaren something that wasn't just a setup trick — it was baked into the car's design philosophy, and rebuilding it mid-season under entirely new rules is a different challenge from refining what already worked. Stella's candour about concept trade-offs is notable: McLaren knowingly sacrificed some tyre conditioning capability to meet other design priorities, which means this isn't a simple fix. With smaller tyres sliding more, a new rear brake cooling architecture, and less overall downforce, the variables that made the 2025 car so benign on rubber have multiplied. Barcelona, historically a race that rewards exactly the thermal control McLaren no longer leads in, is the worst possible venue for this admission to land.