275/45R19 tire size

A 275/45R19 tire is 28.7 inches (730 mm) tall and 10.8 inches (275 mm) wide, and fits a 19-inch wheel. In inch sizing it is about a 28.7x10.8R19.

Overall diameter28.74in730 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
225/55R19	28.7″	0.0%	8.9″	4.9″	19″
215/75R16	28.7″	−0.2%	8.5″	6.3″	16″
245/45R20	28.7″	−0.2%	9.6″	4.3″	20″
275/40R20	28.7″	−0.3%	10.8″	4.3″	20″
245/50R19	28.6″	−0.3%	9.6″	4.8″	19″
285/35R21	28.9″	+0.4%	11.2″	3.9″	21″
225/60R18	28.6″	−0.4%	8.9″	5.3″	18″
235/75R15	28.9″	+0.5%	9.3″	6.9″	15″
275/35R21	28.6″	−0.6%	10.8″	3.8″	21″
235/70R16	29.0″	+0.7%	9.3″	6.5″	16″
225/65R17	28.5″	−0.8%	8.9″	5.8″	17″
235/65R17	29.0″	+1.0%	9.3″	6.0″	17″

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

275: Section width: 275 mm (10.8 in) from sidewall to sidewall.
45: Aspect ratio: the sidewall is 45% as tall as the tire is wide, 124 mm (4.9 in).
R: Radial construction, used by almost every modern tire.
19: Fits a 19-inch wheel.

275/45R19 is about 28.7 inches tall and 10.8 inches wide, on a 19-inch wheel, roughly a 28.7x10.8R19 in inch sizing.

Yes. At 28.7 inches it is sold and fitted as a 29-inch tire.

225/55R19, 215/75R16, 245/45R20 are the closest common sizes, all within 0.2% of its diameter, so the speedometer stays close to accurate.

255/55R19 is 4.5% taller, so at an indicated 60 mph you would really be doing 62.7 mph. Compare 275/45R19 and 255/55R19.

About 702 per mile (436 per km), from a 90.3-inch circumference.