Pirelli F1 boss Mario Isola has said increasing the number of tyre compounds to six is a possibility for the 2018 season.
The tyre manufacturer have until September 1 to submit their plans for next season, but they have another three months to decide on the specific compounds available to teams for next year.
They are currently five compounds (hard, medium, soft, supersoft and ultrasoft) made for this season, but Isola reckons there is space for one more.
"Depending on the results, we will decide the number of compounds," Isola explained. "My opinion is to go up to six, which is possible.
"If I look at the regulations the number of compounds is our proposal to the FIA, and usually the FIA accepts, because there is no reason to refuse. In fact this year we homologated 10 compounds – we had the five base compounds, and five back-up compounds.
"We don't need the agreement of the teams. In Abu Dhabi after the race we have two days of testing with all the cars, and all the teams, which is supposed to be for validation of the new product, to give the teams the opportunity to test it in advance.
"So end of November we need to be ready with the final version of our 2018 tyres."