For both power races, teams and drivers had the option of selecting medium, soft and supersoft tyres. Most teams have selected similar numbers except McLaren.
McLaren have gone super conservative with tyre choices. Both Alonso and Vandoorne will travel to Belgium with just 4 supersofts. This is by far the lowest on the grid. In comparison to this, Williams have picked the most aggressive set with 9 sets of supersofts for each driver.
The trends continue for the race in Monza but are less dramatic.