2024 Audi e-tron GT tire size

Most common factory size

P245/45R20

Tire sizes by trim

Source marks: one source

2024 Audi e-tron GT tire size by trim
Size	Trims	Width, mm	Sidewall, % of width	Rim, in	Diameter, in	Sidewall, in	Revs per mile
P245/45R20	Premium Plus AWD	245	45	20	28.68	4.34	703
P265/35R21	Prestige AWD	265	35	21	28.30	3.65	713

What P245/45R20 means
Part	Number	Meaning
Type	P	Passenger car tire.
Width	245 mm	Tread width. 9.6 in.
Sidewall	45	Sidewall height is 45% of the width.
Construction	R	Radial tire.
Rim	20 in	Fits 20 in wheels.

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

Sizes within 3% of P245/45R20
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
275/40R20	20	28.66	-0.1%	60.0 mph
245/40R21	21	28.72	+0.1%	59.9 mph
245/50R19	19	28.65	-0.1%	60.1 mph
225/55R19	19	28.74	+0.2%	59.9 mph
275/45R19	19	28.74	+0.2%	59.9 mph
275/35R21	21	28.58	-0.4%	60.2 mph
285/35R21	21	28.85	+0.6%	59.6 mph
305/35R20	20	28.41	-1.0%	60.6 mph

Sizes within 3% of P265/35R21
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
235/45R20	20	28.33	+0.1%	59.9 mph
265/40R20	20	28.35	+0.2%	59.9 mph
305/35R20	20	28.41	+0.4%	59.8 mph
255/40R20	20	28.03	-1.0%	60.6 mph
275/35R21	21	28.58	+1.0%	59.4 mph
255/35R21	21	28.03	-1.0%	60.6 mph
225/45R20	20	27.97	-1.2%	60.7 mph
275/40R20	20	28.66	+1.3%	59.3 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.