Porsche Cayenne Owner's Manual page 355

Fully loaded
(more than 3 people and 46 lbs./21 kg
of luggage)
Tire size
235/65 R 17 summer and M+S tires
255/55 R 18 summer and M+S tires
255/50 R 19 M+S tires
275/45 R 19 summer and M+S tires
275/40 R 20 summer and M+S tires
295/35 R 21 summer tires
195/75 - 18 collapsible spare wheel
195/65 - 19 collapsible spare wheel
f On vehicles with Tire Pressure Monitoring, the vehicle load must be set in the multi-purpose display of the instrument panel. Please see the chapter "SET-
TING VEHICLE LOADING AND ADJUSTING TIRE PRESSURE" on Page 135.
Note
M+S identification located on All-Season and winter tires.
Cayenne
Front axle Rear axle
39 psi (2.7 bar) 50 psi (3.4 bar)
Cayenne S,
Cayenne GTS,
Cayenne S Transsyberia
Front axle
-
39 psi (2.7 bar)
51 psi (3.5 bar)
Tire Pressure and Technical Data
Rear axle
-
50 psi (3.4 bar)
355