Pirelli has revealed that its medium, softs and supersoft compounds are to be used at the United States Grand Prix in October.

P Zero White medium, P Zero Yellow soft and P Zero Red supersoft is the same combination used in the opening four races of the season, and again at Baku. Before Austin this combination will also be seen in Hungary, Germany, Belgium and Italy.

The medium and soft compounds must be used at some point in the race, when each driver will have both sets available and must use at least one of them.

Each driver must also save for Q3 one set of the supersofts. This set will be given back to Pirelli after Q3 for those who qualify in the top 10, but the remaining drivers will keep it for the race.

The teams are free to choose the remaining 10 sets; making up 13 sets in total for the Austin weekend.

The new 2016 tyre regulations mean that tyre nomination for long-haul events have to be made 14 weeks in advance, whereas for European races the deadline is eight weeks in advance.

Confirmed Tyre Compounds

Grand Prix	Ultra Soft	Super Soft	Soft	Medium	Hard
Australia		X	X	X
Bahrain		X	X	X
China		X	X	X
Russia		X	X	X
Spain			X	X	X
Monaco	X	X	X
Canada	X	X	X
Azerbaijan		X	X	X
Austria	X	X	X
Britain			X	X	X
Hungary		X	X	X
Germany		X	X	X
Belgium		X	X	X
Italy		X	X	X
Singapore	X	X	X
Malaysia			X	X	X
Japan			X	X	X
USA		X	X	X