265/35R18 tire size

A 265/35R18 tire is 25.3 inches (643 mm) tall and 10.4 inches (265 mm) wide, and fits a 18-inch wheel. In inch sizing it is about a 25.3x10.4R18.

Overall diameter25.30in643 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
205/70R14	25.3″	−0.0%	8.1″	5.6″	14″
215/55R16	25.3″	+0.0%	8.5″	4.7″	16″
235/45R17	25.3″	+0.1%	9.3″	4.2″	17″
235/40R18	25.4″	+0.4%	9.3″	3.7″	18″
225/35R19	25.2″	−0.4%	8.9″	3.1″	19″
215/50R17	25.5″	+0.6%	8.5″	4.2″	17″
235/35R19	25.5″	+0.7%	9.3″	3.2″	19″
205/65R15	25.5″	+0.7%	8.1″	5.2″	15″
195/75R14	25.5″	+0.8%	7.7″	5.8″	14″
225/40R18	25.1″	−0.9%	8.9″	3.5″	18″
205/50R17	25.1″	−0.9%	8.1″	4.0″	17″
255/40R17	25.0″	−1.1%	10.0″	4.0″	17″

Within 3% of the original diameter is the range most tire shops treat as a direct swap. Check load index and clearance too.

265: Section width: 265 mm (10.4 in) from sidewall to sidewall.
35: Aspect ratio: the sidewall is 35% as tall as the tire is wide, 93 mm (3.7 in).
R: Radial construction, used by almost every modern tire.
18: Fits a 18-inch wheel.

265/35R18 is about 25.3 inches tall and 10.4 inches wide, on a 18-inch wheel, roughly a 25.3x10.4R18 in inch sizing.

Nearly. It measures 25.3 inches, so it falls between 25 and 26 inches.

205/70R14, 215/55R16, 235/45R17 are the closest common sizes, all within 0.1% of its diameter, so the speedometer stays close to accurate.

255/40R18 is 2.9% taller, so at an indicated 60 mph you would really be doing 61.7 mph. Compare 265/35R18 and 255/40R18.

About 797 per mile (495 per km), from a 79.5-inch circumference.