The track alternates very slow corners with high-speed sections. Traction and lateral forces ensure a medium to high level of stress for the tyres, especially in turns five and six.
The Red Bull Ring requires maximum downforce, in order to try and generate as much aerodynamic grip as possible on a circuit that has quite a low average speed. The effect of the downforce however is to put greater vertical forces on the cars. This is combined with sideways forces when the car goes round the corner, placing a number of different stresses on the tyres.
The supersoft tyre is a low working range compound, capable of achieving optimal performance even at low temperatures. The soft tyre is a high working range compound, suitable for higher temperatures and more strenuous track conditions. Temperatures in Spielberg can vary but are generally in the region of 22 degrees centigrade, with a high risk of rain.
The asphalt is generally very smooth in Spielberg, having been extensively renewed recently. This means that the cars will slide more, especially at the start of the weekend, and this can cause graining if not kept under control.
The teams will decide on strategy when they get there and see some data from free practice, but starting on the supersoft followed by two stints on the soft would seem to be the most popular option. (Pirelli)