2026 Genesis G80 tire size

Most common factory size

P245/40R20

Tire sizes by trim

Source marks: one source

2026 Genesis G80 tire size by trim
Size	Trims	Width, mm	Sidewall, % of width	Rim, in	Diameter, in	Sidewall, in	Revs per mile
P245/40R20	2.5T Sport Prestige AWD, 3.5T Sport Prestige AWD, 3.5T Prestige Black AWD	245	40	20	27.72	3.86	728
P245/50R18	2.5T AWD	245	50	18	27.65	4.82	730
P245/45R19	2.5T Advanced AWD	245	45	19	27.68	4.34	729

What P245/40R20 means
Part	Number	Meaning
Type	P	Passenger car tire.
Width	245 mm	Tread width. 9.6 in.
Sidewall	40	Sidewall height is 40% 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 P245/40R20
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
245/35R21	21	27.75	+0.1%	59.9 mph
245/45R19	19	27.68	-0.1%	60.1 mph
275/40R19	19	27.66	-0.2%	60.1 mph
215/45R20	20	27.62	-0.4%	60.2 mph
175/55R20	20	27.58	-0.5%	60.3 mph
275/35R20	20	27.58	-0.5%	60.3 mph
285/35R20	20	27.85	+0.5%	59.7 mph
155/70R19	19	27.54	-0.6%	60.4 mph

Sizes within 3% of P245/50R18
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
275/40R19	19	27.66	+0.1%	60.0 mph
225/60R17	17	27.63	-0.1%	60.0 mph
245/45R19	19	27.68	+0.1%	59.9 mph
245/55R17	17	27.61	-0.1%	60.1 mph
225/55R18	18	27.74	+0.4%	59.8 mph
155/70R19	19	27.54	-0.4%	60.2 mph
315/40R18	18	27.92	+1.0%	59.4 mph
265/40R19	19	27.35	-1.1%	60.7 mph

Sizes within 3% of P245/45R19
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
275/40R19	19	27.66	-0.1%	60.0 mph
245/40R20	20	27.72	+0.1%	59.9 mph
245/50R18	18	27.65	-0.1%	60.1 mph
215/45R20	20	27.62	-0.2%	60.1 mph
225/55R18	18	27.74	+0.2%	59.9 mph
175/55R20	20	27.58	-0.4%	60.2 mph
275/35R20	20	27.58	-0.4%	60.2 mph
155/70R19	19	27.54	-0.5%	60.3 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.