Pirelli opposes weight-saving smaller wheels for F1

FORMULA 1

Formula 1 is poised to reject a switch to smaller 16-inch wheelrims for the 2026 rules revamp. A two-inch shrink was intended to contribute to weight-saving measures that the FIA is implementing for the next-generation car, which will have a reduced footprint. But tyre manufacturer Pirelli has opposed the change.

The current 18-inch set-up, introduced for 2022, more closely resembles the bigger rims that customers are demanding for their road cars. A new size would also require major changes to the production process, which would have to be completed in time to launch a full test programme with mule F1 cars in 2025. It would also be an extra variable for teams to adjust to, in addition to the forthcoming new chassis and powertrain regulations.

“We have to change because the new car is different, and in any case, we have to design a smaller tyre,” said Pirelli motorsport boss Mario Isola.

“The discussion is between 16 and 18-inch [rims]. Our preference is to stay on 18-inch. I believe that there are valid reasons to stay on 18-inch, with smaller tyres, but still the same rim. That’s what we are discussing – just a bit smaller diameter, a slightly lower profile and slightly narrower tyre.”

Isola downplayed the weight-saving from a switch to 16 inches. “The difference between 16 and 18 and a narrow 18 is not huge,” he said. “So, the weight element is there. But it’s not the only element. There is an element of performance. Obviously, if you were to go to 16-inch, much smaller, the risk of overheating is much higher. A smaller diameter means that you disperse the heat in a different way.”