225/55R17 tire size

A 225/55R17 tire is 26.7 inches (679 mm) tall and 8.9 inches (225 mm) wide, and fits a 17-inch wheel. In inch sizing it is about a 26.7x8.9R17.

Overall diameter26.74in679 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
245/35R20	26.8″	+0.0%	9.6″	3.4″	20″
245/40R19	26.7″	−0.1%	9.6″	3.9″	19″
215/75R14	26.7″	−0.2%	8.5″	6.3″	14″
245/45R18	26.7″	−0.2%	9.6″	4.3″	18″
275/40R18	26.7″	−0.3%	10.8″	4.3″	18″
215/70R15	26.9″	+0.4%	8.5″	5.9″	15″
225/60R16	26.6″	−0.4%	8.9″	5.3″	16″
275/35R19	26.6″	−0.6%	10.8″	3.8″	19″
225/45R19	27.0″	+0.9%	8.9″	4.0″	19″
205/65R16	26.5″	−0.9%	8.1″	5.2″	16″
215/65R16	27.0″	+1.0%	8.5″	5.5″	16″
235/35R20	26.5″	−1.0%	9.3″	3.2″	20″

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

225: Section width: 225 mm (8.9 in) from sidewall to sidewall.
55: Aspect ratio: the sidewall is 55% as tall as the tire is wide, 124 mm (4.9 in).
R: Radial construction, used by almost every modern tire.
17: Fits a 17-inch wheel.

225/55R17 is about 26.7 inches tall and 8.9 inches wide, on a 17-inch wheel, roughly a 26.7x8.9R17 in inch sizing.

Yes. At 26.7 inches it is sold and fitted as a 27-inch tire.

245/35R20, 245/40R19, 215/75R14 are the closest common sizes, all within 0.2% of its diameter, so the speedometer stays close to accurate.

225/60R17 is 3.3% taller, so at an indicated 60 mph you would really be doing 62.0 mph. Compare 225/55R17 and 225/60R17.

About 754 per mile (469 per km), from a 84.0-inch circumference.