195/55R15 tire size

A 195/55R15 tire is 23.4 inches (596 mm) tall and 7.7 inches (195 mm) wide, and fits a 15-inch wheel. In inch sizing it is about a 23.4x7.7R15.

Overall diameter23.44in596 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
185/65R14	23.5″	+0.1%	7.3″	4.7″	14″
165/80R13	23.4″	−0.2%	6.5″	5.2″	13″
175/70R14	23.6″	+0.9%	6.9″	4.8″	14″
195/50R16	23.7″	+1.0%	7.7″	3.8″	16″
195/60R14	23.2″	−1.0%	7.7″	4.6″	14″
185/70R13	23.2″	−1.1%	7.3″	5.1″	13″
185/60R15	23.7″	+1.3%	7.3″	4.4″	15″
165/70R14	23.1″	−1.5%	6.5″	4.5″	14″
185/55R15	23.0″	−1.8%	7.3″	4.0″	15″
205/55R15	23.9″	+1.8%	8.1″	4.4″	15″
175/65R14	23.0″	−2.1%	6.9″	4.5″	14″
175/65R15	24.0″	+2.2%	6.9″	4.5″	15″

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

195: Section width: 195 mm (7.7 in) from sidewall to sidewall.
55: Aspect ratio: the sidewall is 55% as tall as the tire is wide, 107 mm (4.2 in).
R: Radial construction, used by almost every modern tire.
15: Fits a 15-inch wheel.

195/55R15 is about 23.4 inches tall and 7.7 inches wide, on a 15-inch wheel, roughly a 23.4x7.7R15 in inch sizing.

Nearly. It measures 23.4 inches, so it falls between 23 and 24 inches.

185/65R14, 165/80R13, 175/70R14 are the closest common sizes, all within 0.9% of its diameter, so the speedometer stays close to accurate.

195/60R15 is 3.3% taller, so at an indicated 60 mph you would really be doing 62.0 mph. Compare 195/55R15 and 195/60R15.

About 860 per mile (535 per km), from a 73.7-inch circumference.