205/70R15 tire size

A 205/70R15 tire is 26.3 inches (668 mm) tall and 8.1 inches (205 mm) wide, and fits a 15-inch wheel. In inch sizing it is about a 26.3x8.1R15.

Overall diameter26.30in668 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
215/55R17	26.3″	+0.0%	8.5″	4.7″	17″
235/45R18	26.3″	+0.1%	9.3″	4.2″	18″
225/35R20	26.2″	−0.4%	8.9″	3.1″	20″
235/40R19	26.4″	+0.4%	9.3″	3.7″	19″
215/60R16	26.2″	−0.5%	8.5″	5.1″	16″
235/35R20	26.5″	+0.7%	9.3″	3.2″	20″
205/65R16	26.5″	+0.7%	8.1″	5.2″	16″
205/75R14	26.1″	−0.7%	8.1″	6.1″	14″
225/40R19	26.1″	−0.8%	8.9″	3.5″	19″
255/40R18	26.0″	−1.0%	10.0″	4.0″	18″
255/35R19	26.0″	−1.0%	10.0″	3.5″	19″
275/35R19	26.6″	+1.1%	10.8″	3.8″	19″

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.
70: Aspect ratio: the sidewall is 70% as tall as the tire is wide, 144 mm (5.6 in).
R: Radial construction, used by almost every modern tire.
15: Fits a 15-inch wheel.

205/70R15 is about 26.3 inches tall and 8.1 inches wide, on a 15-inch wheel, roughly a 26.3x8.1R15 in inch sizing.

Yes. At 26.3 inches it is sold and fitted as a 26-inch tire.

215/55R17, 235/45R18, 225/35R20 are the closest common sizes, all within 0.4% of its diameter, so the speedometer stays close to accurate.

225/70R15 is 4.2% taller, so at an indicated 60 mph you would really be doing 62.5 mph. Compare 205/70R15 and 225/70R15.

About 767 per mile (477 per km), from a 82.6-inch circumference.