2021 Subaru Outback tire size

Most common factory size

P225/60R18

Tire sizes by trim

Source marks: one source

2021 Subaru Outback tire size by trim
Size	Trims	Width, mm	Sidewall, % of width	Rim, in	Diameter, in	Sidewall, in	Revs per mile
P225/60R18	Limited AWD, Onyx Edition XT AWD, Touring AWD, Limited XT AWD, Touring XT AWD	225	60	18	28.63	5.31	704
P225/65R17	AWD, Premium AWD	225	65	17	28.52	5.76	707

What P225/60R18 means
Part	Number	Meaning
Type	P	Passenger car tire.
Width	225 mm	Tread width. 8.9 in.
Sidewall	60	Sidewall height is 60% of the width.
Construction	R	Radial tire.
Rim	18 in	Fits 18 in wheels.

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

Sizes within 3% of P225/60R18
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
245/50R19	19	28.65	+0.1%	60.0 mph
245/55R18	18	28.61	-0.1%	60.0 mph
225/65R17	17	28.52	-0.4%	60.2 mph
225/55R19	19	28.74	+0.4%	59.8 mph
275/45R19	19	28.74	+0.4%	59.8 mph
215/70R17	17	28.85	+0.8%	59.5 mph
265/45R19	19	28.39	-0.8%	60.5 mph
235/50R19	19	28.25	-1.3%	60.8 mph

Sizes within 3% of P225/65R17
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
245/55R18	18	28.61	+0.3%	59.8 mph
225/60R18	18	28.63	+0.4%	59.8 mph
225/70R16	16	28.40	-0.4%	60.2 mph
215/70R17	17	28.85	+1.2%	59.3 mph
235/55R18	18	28.18	-1.2%	60.7 mph
235/60R17	17	28.10	-1.4%	60.9 mph
235/70R16	16	28.95	+1.5%	59.1 mph
255/50R18	18	28.04	-1.7%	61.0 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.