Each rider has a maximum of 10 front and 12 rear tires available over the weekend. Also, the rules specify the maximum number of particular compounds per race weekend. For example, each rider is allowed to select from a maximum of 5 soft, 5 medium, and 5 hard – without going over their 22 tire allocation. Tire selection is made at the beginning of the weekend. However, the rider is given the opportunity to make changes of a maximum of four tires throughout the weekend, if necessary. Since the top two riders in Q2 qualifying end up riding an extra session by making it into Q1, they are allowed one additional set of tires to use for the final determination of the starting grid.