2025 Volvo XC90 tire size

Most common factory size

P275/40R21

Tire sizes by trim

Source marks: one source

2025 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 Bright Theme (2025.5) AWD, B6 Plus Bright Theme (2025.5) AWD, B5 Ultra Bright Theme (2025.5) AWD, B6 Ultra Bright Theme (2025.5) AWD, T8 Plus Bright Theme (2025.5) AWD, T8 Ultra Bright Theme (2025.5) AWD	275	40	21	29.66	4.33	680
P275/45R20	B5 Core Bright Theme (2025.5) AWD, B6 Core Bright Theme (2025.5) AWD, T8 Core Bright Theme (2025.5) 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.