215/75R15 tire size

A 215/75R15 tire is 27.7 inches (704 mm) tall and 8.5 inches (215 mm) wide, and fits a 15-inch wheel. In inch sizing it is about a 27.7x8.5R15.

Overall diameter27.70in704 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
245/45R19	27.7″	−0.1%	9.6″	4.3″	19″
245/40R20	27.7″	+0.1%	9.6″	3.9″	20″
275/40R19	27.7″	−0.1%	10.8″	4.3″	19″
225/55R18	27.7″	+0.2%	8.9″	4.9″	18″
245/50R18	27.6″	−0.2%	9.6″	4.8″	18″
245/35R21	27.8″	+0.2%	9.6″	3.4″	21″
225/60R17	27.6″	−0.2%	8.9″	5.3″	17″
215/70R16	27.9″	+0.6%	8.5″	5.9″	16″
225/70R15	27.4″	−1.1%	8.9″	6.2″	15″
215/65R17	28.0″	+1.1%	8.5″	5.5″	17″
255/30R22	28.0″	+1.2%	10.0″	3.0″	22″
235/65R16	28.0″	+1.2%	9.3″	6.0″	16″

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

215: Section width: 215 mm (8.5 in) from sidewall to sidewall.
75: Aspect ratio: the sidewall is 75% as tall as the tire is wide, 161 mm (6.3 in).
R: Radial construction, used by almost every modern tire.
15: Fits a 15-inch wheel.

215/75R15 is about 27.7 inches tall and 8.5 inches wide, on a 15-inch wheel, roughly a 27.7x8.5R15 in inch sizing.

Nearly. It measures 27.7 inches, so it falls between 27 and 28 inches.

245/45R19, 245/40R20, 275/40R19 are the closest common sizes, all within 0.1% of its diameter, so the speedometer stays close to accurate.

235/75R15 is 4.3% taller, so at an indicated 60 mph you would really be doing 62.6 mph. Compare 215/75R15 and 235/75R15.

About 728 per mile (452 per km), from a 87.0-inch circumference.