2024 Porsche Macan tire size

Most common factory size

P295/40R21

Tire sizes by trim

Source marks: one source

2024 Porsche Macan tire size by trim
Size	Trims	Width, mm	Sidewall, % of width	Rim, in	Diameter, in	Sidewall, in	Revs per mile
P295/40R21	Electric 4 AWD, EV 4 AWD, Electric Turbo AWD, EV Turbo AWD	295	40	21	30.29	4.65	666
P265/45R20	AWD, T AWD, S AWD	265	45	20	29.39	4.69	686
P265/40R21	GTS AWD	265	40	21	29.35	4.17	687

What P295/40R21 means
Part	Number	Meaning
Type	P	Passenger car tire.
Width	295 mm	Tread width. 11.6 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 P295/40R21
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
235/50R21	21	30.25	-0.1%	60.1 mph
265/40R22	22	30.35	+0.2%	59.9 mph
265/45R21	21	30.39	+0.3%	59.8 mph
235/55R20	20	30.18	-0.4%	60.2 mph
265/50R20	20	30.43	+0.5%	59.7 mph
295/45R20	20	30.45	+0.5%	59.7 mph
285/45R20	20	30.10	-0.6%	60.4 mph
255/50R20	20	30.04	-0.8%	60.5 mph

Sizes within 3% of P265/45R20
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
265/40R21	21	29.35	-0.1%	60.1 mph
265/50R19	19	29.43	+0.1%	59.9 mph
235/45R21	21	29.33	-0.2%	60.1 mph
295/40R20	20	29.29	-0.3%	60.2 mph
235/50R20	20	29.25	-0.5%	60.3 mph
235/55R19	19	29.18	-0.7%	60.4 mph
245/55R19	19	29.61	+0.8%	59.6 mph
225/60R19	19	29.63	+0.8%	59.5 mph

Sizes within 3% of P265/40R21
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
235/45R21	21	29.33	-0.1%	60.0 mph
265/35R22	22	29.30	-0.1%	60.1 mph
265/45R20	20	29.39	+0.1%	59.9 mph
295/40R20	20	29.29	-0.2%	60.1 mph
235/50R20	20	29.25	-0.3%	60.2 mph
295/35R21	21	29.13	-0.7%	60.4 mph
275/35R22	22	29.58	+0.8%	59.5 mph
245/50R20	20	29.65	+1.0%	59.4 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.