2026 Mazda CX-30 tire size

Most common factory size

P215/55R18

Tire sizes by trim

Source marks: one source

2026 Mazda CX-30 tire size by trim
Size	Trims	Width, mm	Sidewall, % of width	Rim, in	Diameter, in	Sidewall, in	Revs per mile
P215/55R18	2.5 S Select Sport AWD, 2.5 S Preferred AWD, 2.5 S Aire Edition AWD, 2.5 S Carbon Edition AWD, 2.5 S Premium AWD, 2.5 Turbo Aire Edition AWD +1 more	215	55	18	27.31	4.66	738
P215/65R16	2.5 S AWD	215	65	16	27.00	5.50	747

What P215/55R18 means
Part	Number	Meaning
Type	P	Passenger car tire.
Width	215 mm	Tread width. 8.5 in.
Sidewall	55	Sidewall height is 55% 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 P215/55R18
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
235/45R19	19	27.33	+0.1%	60.0 mph
265/40R19	19	27.35	+0.1%	59.9 mph
235/50R18	18	27.25	-0.2%	60.1 mph
235/55R17	17	27.18	-0.5%	60.3 mph
215/60R17	17	27.16	-0.6%	60.3 mph
295/35R19	19	27.13	-0.7%	60.4 mph
155/70R19	19	27.54	+0.9%	59.5 mph
255/50R17	17	27.04	-1.0%	60.6 mph

Sizes within 3% of P215/65R16
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
255/50R17	17	27.04	+0.1%	59.9 mph
235/60R16	16	27.10	+0.4%	59.8 mph
215/60R17	17	27.16	+0.6%	59.7 mph
215/70R15	15	26.85	-0.6%	60.3 mph
235/55R17	17	27.18	+0.6%	59.6 mph
225/55R17	17	26.74	-1.0%	60.6 mph
205/70R16	16	27.30	+1.1%	59.4 mph
205/60R17	17	26.69	-1.2%	60.7 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.