2026 BMW X3 tire size

Most common factory size

P245/50R19

Tire sizes by trim

Source marks: one source

2026 BMW X3 tire size by trim
Size	Trims	Width, mm	Sidewall, % of width	Rim, in	Diameter, in	Sidewall, in	Revs per mile
P245/50R19	xDrive30 AWD	245	50	19	28.65	4.82	704
P255/45R20	M50 AWD	255	45	20	29.04	4.52	695

What P245/50R19 means
Part	Number	Meaning
Type	P	Passenger car tire.
Width	245 mm	Tread width. 9.6 in.
Sidewall	50	Sidewall height is 50% of the width.
Construction	R	Radial tire.
Rim	19 in	Fits 19 in wheels.

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

Sizes within 3% of P245/50R19
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
275/40R20	20	28.66	+0.1%	60.0 mph
225/60R18	18	28.63	-0.1%	60.0 mph
245/45R20	20	28.68	+0.1%	59.9 mph
245/55R18	18	28.61	-0.1%	60.1 mph
225/55R19	19	28.74	+0.3%	59.8 mph
275/45R19	19	28.74	+0.3%	59.8 mph
305/35R20	20	28.41	-0.8%	60.5 mph
265/45R19	19	28.39	-0.9%	60.5 mph

Sizes within 3% of P255/45R20
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
255/40R21	21	29.03	-0.0%	60.0 mph
255/50R19	19	29.04	+0.0%	60.0 mph
285/40R20	20	28.98	-0.2%	60.1 mph
225/45R21	21	28.97	-0.2%	60.1 mph
325/35R20	20	28.96	-0.3%	60.2 mph
295/35R21	21	29.13	+0.3%	59.8 mph
235/55R19	19	29.18	+0.5%	59.7 mph
285/35R21	21	28.85	-0.6%	60.4 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.