205/55R16 tire size

A 205/55R16 tire is 24.9 inches (632 mm) tall and 8.1 inches (205 mm) wide, and fits a 16-inch wheel. In inch sizing it is about a 24.9x8.1R16.

Overall diameter24.88in632 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
225/50R16	24.9″	−0.1%	8.9″	4.4″	16″
225/45R17	25.0″	+0.4%	8.9″	4.0″	17″
195/65R15	25.0″	+0.4%	7.7″	5.0″	15″
195/70R14	24.7″	−0.5%	7.7″	5.4″	14″
255/35R18	25.0″	+0.6%	10.0″	3.5″	18″
255/40R17	25.0″	+0.6%	10.0″	4.0″	17″
245/40R17	24.7″	−0.6%	9.6″	3.9″	17″
205/60R15	24.7″	−0.8%	8.1″	4.8″	15″
205/50R17	25.1″	+0.8%	8.1″	4.0″	17″
225/40R18	25.1″	+0.8%	8.9″	3.5″	18″
215/45R17	24.6″	−1.0%	8.5″	3.8″	17″
225/35R19	25.2″	+1.3%	8.9″	3.1″	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.
55: Aspect ratio: the sidewall is 55% as tall as the tire is wide, 113 mm (4.4 in).
R: Radial construction, used by almost every modern tire.
16: Fits a 16-inch wheel.

205/55R16 is about 24.9 inches tall and 8.1 inches wide, on a 16-inch wheel, roughly a 24.9x8.1R16 in inch sizing.

Yes. At 24.9 inches it is sold and fitted as a 25-inch tire.

225/50R16, 225/45R17, 195/65R15 are the closest common sizes, all within 0.4% of its diameter, so the speedometer stays close to accurate.

205/60R16 is 3.2% taller, so at an indicated 60 mph you would really be doing 61.9 mph. Compare 205/55R16 and 205/60R16.

About 811 per mile (504 per km), from a 78.2-inch circumference.