Cayenne official website shows that the normal standard tire of this brand is 2.4-2.5 bar. Due to seasonal factors, the tire pressure of Cayenne can be increased by 0.2bar in winter and decreased by 0. 1bar in summer. These data are stipulated and required by the international standard GBT2978-2008. The tire pressure of Cayenne can be found in the vehicle owner's manual, and can also be found on the labels on the cab door, fuel tank cover, storage box and other places to recommend the tire pressure of the vehicle. Generally speaking, the tire pressure above 2.8bar is too high and the tire pressure below 2.0bar is too low.