205/65R15 tire size

A 205/65R15 tire is 25.5 inches (648 mm) tall and 8.1 inches (205 mm) wide, and fits a 15-inch wheel. In inch sizing it is about a 25.5x8.1R15.

Overall diameter25.49in648 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
235/35R19	25.5″	−0.1%	9.3″	3.2″	19″
195/75R14	25.5″	+0.1%	7.7″	5.8″	14″
215/50R17	25.5″	−0.1%	8.5″	4.2″	17″
275/35R18	25.6″	+0.3%	10.8″	3.8″	18″
235/40R18	25.4″	−0.4%	9.3″	3.7″	18″
215/45R18	25.6″	+0.5%	8.5″	3.8″	18″
225/60R15	25.6″	+0.5%	8.9″	5.3″	15″
235/45R17	25.3″	−0.6%	9.3″	4.2″	17″
215/55R16	25.3″	−0.7%	8.5″	4.7″	16″
245/45R17	25.7″	+0.7%	9.6″	4.3″	17″
265/35R18	25.3″	−0.7%	10.4″	3.7″	18″
205/60R16	25.7″	+0.8%	8.1″	4.8″	16″

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

205: Section width: 205 mm (8.1 in) from sidewall to sidewall.
65: Aspect ratio: the sidewall is 65% as tall as the tire is wide, 133 mm (5.2 in).
R: Radial construction, used by almost every modern tire.
15: Fits a 15-inch wheel.

205/65R15 is about 25.5 inches tall and 8.1 inches wide, on a 15-inch wheel, roughly a 25.5x8.1R15 in inch sizing.

Nearly. It measures 25.5 inches, so it falls between 25 and 26 inches.

235/35R19, 195/75R14, 215/50R17 are the closest common sizes, all within 0.1% of its diameter, so the speedometer stays close to accurate.

205/70R15 is 3.2% taller, so at an indicated 60 mph you would really be doing 61.9 mph. Compare 205/65R15 and 205/70R15.

About 791 per mile (492 per km), from a 80.1-inch circumference.