According to AMuS: Pirelli will decide for every race which three tyre compounds can be used. Than the teams can free decide how many of which compound they want for each driver (e.g. 6 super soft, 4 softs, 3 mediums). They can choose overall 13 sets per driver. It doesnt need to be the same for both drivers in the team
http://www.auto-moto...n-10225625.html
Let me guess... Drivers have to use all THREE compounds in the race because that will be good for the show?