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2026 Honda Civic tire size

Most common factory size

P235/40R18

Factory sizes
3
Across 4 trims
Trims with it
2 of 4
Trims with no size
6
Diameter
25.40 in
Revs per mile
794

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Tire sizes by trim

Source marks: one source

2026 Honda Civic tire size by trim
SizeTrimsWidth, mmSidewall, % of widthRim, inDiameter, inSidewall, inRevs per mile
P235/40R18Sport FWD, Si FWD235401825.403.70794
P215/55R16LX FWD215551625.314.66797
P265/30R19Type R Base Style FWD265301925.263.13798

What P235/40R18 means

What P235/40R18 means
PartNumberMeaning
TypePPassenger car tire.
Width235 mmTread width. 9.3 in.
Sidewall40Sidewall height is 40% of the width.
ConstructionRRadial tire.
Rim18 inFits 18 in wheels.

Other sizes that fit

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

Sizes within 3% of P235/40R18
SizeRim, inDiameter, inChangeSpeedo reads at 60 mph
215/50R171725.46+0.2%59.9 mph
235/35R191925.48+0.3%59.8 mph
235/45R171725.33-0.3%60.2 mph
205/45R181825.26-0.5%60.3 mph
265/30R191925.26-0.6%60.3 mph
275/35R181825.58+0.7%59.6 mph
225/35R191925.20-0.8%60.5 mph
215/45R181825.62+0.9%59.5 mph
Sizes within 3% of P215/55R16
SizeRim, inDiameter, inChangeSpeedo reads at 60 mph
235/45R171725.33+0.1%60.0 mph
195/60R161625.21-0.4%60.2 mph
215/50R171725.46+0.6%59.6 mph
205/65R151525.49+0.7%59.6 mph
205/50R171725.07-0.9%60.6 mph
195/65R151524.98-1.3%60.8 mph
225/45R171724.97-1.3%60.8 mph
245/45R171725.68+1.5%59.1 mph
Sizes within 3% of P265/30R19
SizeRim, inDiameter, inChangeSpeedo reads at 60 mph
205/45R181825.26+0.0%60.0 mph
225/35R191925.20-0.2%60.1 mph
235/40R181825.40+0.6%59.7 mph
225/40R181825.09-0.7%60.4 mph
235/35R191925.48+0.9%59.5 mph
255/35R181825.03-0.9%60.6 mph
255/30R191925.02-0.9%60.6 mph
295/30R181824.97-1.2%60.7 mph

Checked against 292 factory sizes listed for 2009-2027 US models.

What this cannot tell you

Tire pressure is on the driver door sticker. Not in this data.

Optional wheel packages may differ.

How values are checked