The last race of the FIM MXGP World Championship was held on the Californian circuit of Glen Helen. The 2015 season ended with the close of the US Grand Prix; one that has given Pirelli the world title in both classes. Romain Febvre had a great race in the MXGP class in round 18, where thanks to two outstanding performances; he won the Grand Prix to boast eight victories in an amazing season. The SCORPION™ MX32™ 80/100-21 front and 110/90-19 rear allowed the French rider to own the first race and to finish second in the last outing of 2015. Febvre has dominated for much of the season to claim the title in his debut year, a result that has only been achieved in the past by eight-time World Champion, Antonio Cairoli.

Motocross World Title No. 64 for Pirelli came thanks to young hotshot Tim Gajser, who clinched the crown in the MX2 class. 2015 has been an excellent season for the Slovenian who, at only nineteen years old, has risen to be World Champion. Gajser had an advantage of 18 points over Pauls Jonass before the Grand Prix, and with Pirelli tires SCORPION™ MX32™ 80/100-21 front and 110/90-19 rear, he held a margin over his opponent, avoided mistakes and became the first ever MX champion from Slovenia.