225/45R19 tire size

A 225/45R19 tire is 27.0 inches (685 mm) tall and 8.9 inches (225 mm) wide, and fits a 19-inch wheel. In inch sizing it is about a 27.0x8.9R19.

Overall diameter26.97in685 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
215/65R16	27.0″	+0.1%	8.5″	5.5″	16″
255/35R20	27.0″	+0.2%	10.0″	3.5″	20″
255/40R19	27.0″	+0.2%	10.0″	4.0″	19″
255/45R18	27.0″	+0.2%	10.0″	4.5″	18″
215/70R15	26.9″	−0.5%	8.5″	5.9″	15″
235/60R16	27.1″	+0.5%	9.3″	5.6″	16″
215/60R17	27.2″	+0.7%	8.5″	5.1″	17″
235/55R17	27.2″	+0.8%	9.3″	5.1″	17″
245/35R20	26.8″	−0.8%	9.6″	3.4″	20″
225/55R17	26.7″	−0.8%	8.9″	4.9″	17″
245/40R19	26.7″	−0.9%	9.6″	3.9″	19″
215/75R14	26.7″	−1.0%	8.5″	6.3″	14″

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.
45: Aspect ratio: the sidewall is 45% as tall as the tire is wide, 101 mm (4.0 in).
R: Radial construction, used by almost every modern tire.
19: Fits a 19-inch wheel.

225/45R19 is about 27.0 inches tall and 8.9 inches wide, on a 19-inch wheel, roughly a 27.0x8.9R19 in inch sizing.

Yes. At 27.0 inches it is sold and fitted as a 27-inch tire.

215/65R16, 255/35R20, 255/40R19 are the closest common sizes, all within 0.2% of its diameter, so the speedometer stays close to accurate.

245/45R19 is 2.6% taller, so at an indicated 60 mph you would really be doing 61.6 mph. Compare 225/45R19 and 245/45R19.

About 748 per mile (465 per km), from a 84.7-inch circumference.