2022 Porsche Cayenne Coupe tire size

Most common factory size

P285/40R21

Tire sizes by trim

Source marks: one source

2022 Porsche Cayenne Coupe tire size by trim
Size	Trims	Width, mm	Sidewall, % of width	Rim, in	Diameter, in	Sidewall, in	Revs per mile
P285/40R21	Platinum Edition AWD, S Platinum Edition AWD, GTS AWD, Turbo AWD	285	40	21	29.98	4.49	673
P275/45R20	AWD, S AWD	275	45	20	29.74	4.87	678
P285/35R22	Turbo GT AWD	285	35	22	29.85	3.93	676

What P285/40R21 means
Part	Number	Meaning
Type	P	Passenger car tire.
Width	285 mm	Tread width. 11.2 in.
Sidewall	40	Sidewall height is 40% of the width.
Construction	R	Radial tire.
Rim	21 in	Fits 21 in wheels.

Within 3% of the stock diameter. A common shop guideline, not a maker spec.

Sizes within 3% of P285/40R21
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
255/40R22	22	30.03	+0.2%	59.9 mph
255/45R21	21	30.04	+0.2%	59.9 mph
255/50R20	20	30.04	+0.2%	59.9 mph
285/35R22	22	29.85	-0.4%	60.2 mph
285/45R20	20	30.10	+0.4%	59.8 mph
235/55R20	20	30.18	+0.7%	59.6 mph
275/45R20	20	29.74	-0.8%	60.5 mph
235/50R21	21	30.25	+0.9%	59.5 mph

Sizes within 3% of P275/45R20
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
245/45R21	21	29.68	-0.2%	60.1 mph
275/50R19	19	29.83	+0.3%	59.8 mph
275/40R21	21	29.66	-0.3%	60.2 mph
245/50R20	20	29.65	-0.3%	60.2 mph
225/60R19	19	29.63	-0.4%	60.2 mph
245/55R19	19	29.61	-0.5%	60.3 mph
285/40R21	21	29.98	+0.8%	59.5 mph
255/45R21	21	30.04	+1.0%	59.4 mph

Sizes within 3% of P285/35R22
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
285/40R21	21	29.98	+0.4%	59.8 mph
245/45R21	21	29.68	-0.6%	60.4 mph
255/40R22	22	30.03	+0.6%	59.6 mph
255/45R21	21	30.04	+0.6%	59.6 mph
275/40R21	21	29.66	-0.6%	60.4 mph
275/35R22	22	29.58	-0.9%	60.6 mph
235/50R21	21	30.25	+1.3%	59.2 mph
295/40R21	21	30.29	+1.5%	59.1 mph

Checked against 292 factory sizes listed for 2009-2027 US models.

Tire pressure is on the driver door sticker. Not in this data.

Optional wheel packages may differ.