2020 Lexus RC-F tire size

Most common factory size

P235/45R18

Tire sizes by trim

Source marks: one source

2020 Lexus RC-F tire size by trim
Size	Trims	Width, mm	Sidewall, % of width	Rim, in	Diameter, in	Sidewall, in	Revs per mile
P235/45R18	RC RC 300 RWD, RC RC 350 RWD	235	45	18	26.33	4.16	766
P235/40R19	RC RC 300 F SPORT RWD, RC RC 350 F SPORT RWD	235	40	19	26.40	3.70	764
P255/35R19	RC RC F RWD, RC RC F Track Edition RWD	255	35	19	26.03	3.51	775

What P235/45R18 means
Part	Number	Meaning
Type	P	Passenger car tire.
Width	235 mm	Tread width. 9.3 in.
Sidewall	45	Sidewall height is 45% 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 P235/45R18
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
215/55R17	17	26.31	-0.1%	60.0 mph
265/35R19	19	26.30	-0.1%	60.1 mph
235/40R19	19	26.40	+0.3%	59.8 mph
235/50R17	17	26.25	-0.3%	60.2 mph
195/60R17	17	26.21	-0.4%	60.3 mph
305/30R19	19	26.20	-0.5%	60.3 mph
215/50R18	18	26.46	+0.5%	59.7 mph
225/40R19	19	26.09	-0.9%	60.6 mph

Sizes within 3% of P235/40R19
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
215/50R18	18	26.46	+0.2%	59.9 mph
235/35R20	20	26.48	+0.3%	59.8 mph
235/45R18	18	26.33	-0.3%	60.2 mph
275/30R20	20	26.50	+0.4%	59.8 mph
265/35R19	19	26.30	-0.4%	60.2 mph
265/30R20	20	26.26	-0.5%	60.3 mph
275/35R19	19	26.58	+0.7%	59.6 mph
305/30R19	19	26.20	-0.7%	60.5 mph

Sizes within 3% of P255/35R19
Size	Rim, in	Diameter, in	Change	Speedo reads at 60 mph
255/30R20	20	26.02	-0.0%	60.0 mph
255/40R18	18	26.03	+0.0%	60.0 mph
225/45R18	18	25.97	-0.2%	60.1 mph
225/40R19	19	26.09	+0.2%	59.9 mph
225/35R20	20	26.20	+0.7%	59.6 mph
305/30R19	19	26.20	+0.7%	59.6 mph
265/30R20	20	26.26	+0.9%	59.5 mph
245/30R20	20	25.79	-0.9%	60.6 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.