Development tyres for Friday practice at final Grand Prix of the season
Pirelli wants to know what they should do.
Formula One received an absolutely fantastic welcome from the American public last year, which made it a truly memorable race.
Pirelli boss Paul Hembery claimed that "some teams went against our recommendations".
Vettel goes fastest on P Zero white medium
This year, Pirelli will take the two hardest compounds in the range: the P Zero Orange hard and P Zero White medium.
Formula One drivers continue to complain and worry about the Pirelli tyres, and now Perez adds his thoughts after the Korean Grand Prix.
The German stopped twice, to become the first driver to win in Korea from pole.
First time for Bottas at the Korean International Circuit
At Spa-Francorchamps rumours again surfaced regarding a possible change of a tyre supplier