Abu Dhabi’s chequered flag barely had time to fold before Formula 1 rolled straight into the future. On Tuesday at Yas Marina, all 10 teams return for the traditional post-season running — only this time there’s a twist. Alongside the usual young-driver mileage, each outfit will unleash a specially adapted “mule” to help Pirelli tune the 2026 tyres.
It’s not a launch, not a reveal, and certainly not representative performance. But it is the first time everyone’s on the same track, on the same day, pointing toward 2026 together. Enough, in other words, to whet an engineer’s appetite.
The brief: simulate next year’s smaller, lighter cars — built around active aerodynamics and trimmed-down downforce — and bolt on Pirelli’s latest 2026 compounds. Front tyres are 25mm narrower than today’s spec, rears 30mm narrower, and each tyre is lighter by 300g and 500g respectively. The mule runners will rotate through C2, C3, C4 and C5 compounds; the young drivers will be limited to C3 through C5.
“It was more difficult for teams to estimate the performance of their 2026 cars at the end of the season,” Pirelli’s Mario Isola said of an R&D process that’s asked for crystal balls as much as data. “But we needed those simulations because we needed to design a product that is lasting for one year. If they just give us an idea at the start of the season, and we don’t know the rate of development, then it’s difficult for us.”
To keep the data clean, Pirelli and the teams agreed on some guardrails. “We decided to avoid overloading the tyres on the straights,” Isola added. “We were testing with a speed limit at 290km/h or 300km/h, because clearly they will have a lot less downforce on the straights next year. Thanks to these methodologies it was possible to have feedback from the mule cars that was a little bit more coherent, more close.”
Don’t expect lap-time fireworks. Expect corner-by-corner learning instead: traction with the slimmer rear, braking stability on the narrower front, how the car breathes through Yas Marina’s long arcs without heavy ground-effect suction. Correlation is king today.
The test runs 09:00–18:00 local, with two cars per team — one mule for Pirelli, one 2025 chassis for the young-driver programme. Max Verstappen and George Russell aren’t on the card, and neither of Aston Martin’s race drivers nor Franco Colapinto will turn laps. Lando Norris, freshly crowned World Champion, will. The McLaren driver shares duties with Oscar Piastri.
Who’s in what? Here’s how the paddock shakes out for Tuesday at Yas Marina:
– McLaren: Lando Norris and Oscar Piastri / Pato O’Ward
– Mercedes: Kimi Antonelli / Frederik Vesti
– Red Bull: Isack Hadjar / Ayumu Iwasa
– Ferrari: Charles Leclerc and Lewis Hamilton / Dino Beganovic
– Williams: Alex Albon and Carlos Sainz / Luke Browning
– Racing Bulls: Liam Lawson / Arvid Lindblad
– Aston Martin: Stoffel Vandoorne / Jak Crawford
– Haas: Oliver Bearman and Esteban Ocon / Ryo Hirakawa
– Sauber: Gabriel Bortoleto and Nico Hülkenberg / Paul Aron
– Alpine: Pierre Gasly / Kush Maini
Isola’s team will sift through mountains of data by nightfall, looking for consistency more than ultimate grip. The key is to build a tyre robust enough for the 2026 concept without over-engineering it for a car that’ll evolve rapidly once the new regs go live. That’s why Pirelli has been frank about guardrails like the straight-line speed caps — control the variables now, so there are fewer surprises later.
In the garages, there’ll be plenty of quiet test items you won’t see on a press release: aero hacks to approximate active devices, brake cooling tweaks, baseline set-ups to mimic the weight distribution of next year’s cars. It’s all approximation — but it’s valuable approximation, especially with the sport pivoting away from heavy ground-effect platforms.
Don’t read too much into single-lap times or sector peaks, and don’t panic if someone looks lost for a session. The point is direction of travel. By the time the floodlights switch off, Pirelli will have the first proper, shared snapshot of how its 2026 tyres behave across 10 very different interpretations of a 2026 mule. For everyone else, it’s the first real rhythm of next year — quietly important, even if it won’t trend.
