2026 Volvo XC90 tire size

Most common factory size

P275/40R21

Tire sizes by trim

Source marks: one source

2026 Volvo XC90 tire size by trim
Size	Trims	Width, mm	Sidewall, % of width	Rim, in	Diameter, in	Sidewall, in	Revs per mile
P275/40R21	B5 Plus AWD, B6 Plus AWD, B5 Ultra AWD, B6 Ultra Dark Theme AWD, B6 Ultra AWD, T8 Plus AWD +2 more	275	40	21	29.66	4.33	680
P275/45R20	B5 Core AWD, B6 Core AWD, T8 Core AWD	275	45	20	29.74	4.87	678

What P275/40R21 means
Part	Number	Meaning
Type	P	Passenger car tire.
Width	275 mm	Tread width. 10.8 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 P275/40R21
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
245/50R20	20	29.65	-0.1%	60.0 mph
245/45R21	21	29.68	+0.1%	60.0 mph
275/35R22	22	29.58	-0.3%	60.2 mph
275/45R20	20	29.74	+0.3%	59.8 mph
285/35R22	22	29.85	+0.7%	59.6 mph
265/45R20	20	29.39	-0.9%	60.6 mph
265/40R21	21	29.35	-1.1%	60.6 mph
285/40R21	21	29.98	+1.1%	59.4 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

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.