Pirelli have revealed that their 18-inch tyres could be ready for the 2016 season should the decision makers go down that road.
Pirelli trialed 18-inch rubber during Wednesday's second day of testing at the Silverstone circuit.
Lotus driver test driver Charles Pic completed 14 laps on the rubber with Paul Hembery saying Pirelli achieved their objectives for the day.
"We weren't looking for performance," Hembery said, "the priority was to show people what a Formula One car would look like with a change of rim.
"We will supply the people in the strategy group and F1 commission with images, so people can make a decision on the future regulations based on fact rather than...
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