A big change today, as the FIM World Supercross Championship has announced Haiden Deegan will race a 450 in his two wild card races in the series, in Argentina and Australia. Deegan was originally announced as a SX2 (250) rider in Argentina, but we spotted a social media post from Deegan this week with a 450, and now it’s been announced that he’s going big (bike) at these races. The supercross debut on the 450 takes place on November 8th.