2023 Acura RDX tire size

Most common factory size

P235/55R19

Tire sizes by trim

Source marks: one source

2023 Acura RDX tire size by trim
Size	Trims	Width, mm	Sidewall, % of width	Rim, in	Diameter, in	Sidewall, in	Revs per mile
P235/55R19	FWD, SH-AWD, FWD w/Technology Pkg FWD, SH-AWD w/Technology Pkg AWD, SH-AWD w/Advance Pkg AWD	235	55	19	29.18	5.09	691
P255/45R20	FWD w/A-Spec Pkg FWD, SH-AWD w/A-Spec Pkg AWD, SH-AWD w/A-Spec & Advance Pkgs AWD	255	45	20	29.04	4.52	695

What P235/55R19 means
Part	Number	Meaning
Type	P	Passenger car tire.
Width	235 mm	Tread width. 9.3 in.
Sidewall	55	Sidewall height is 55% 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 P235/55R19
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
235/50R20	20	29.25	+0.3%	59.8 mph
235/60R18	18	29.10	-0.3%	60.2 mph
295/40R20	20	29.29	+0.4%	59.8 mph
255/55R18	18	29.04	-0.5%	60.3 mph
255/50R19	19	29.04	-0.5%	60.3 mph
255/45R20	20	29.04	-0.5%	60.3 mph
285/40R20	20	28.98	-0.7%	60.4 mph
265/45R20	20	29.39	+0.7%	59.6 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.