285/45R19 tire size

A 285/45R19 tire is 29.1 inches (739 mm) tall and 11.2 inches (285 mm) wide, and fits a 19-inch wheel. In inch sizing it is about a 29.1x11.2R19.

Overall diameter29.10in739 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
235/60R18	29.1″	+0.0%	9.3″	5.6″	18″
295/35R21	29.1″	+0.1%	11.6″	4.1″	21″
255/70R15	29.1″	−0.1%	10.0″	7.0″	15″
255/65R16	29.1″	−0.2%	10.0″	6.5″	16″
255/55R18	29.0″	−0.2%	10.0″	5.5″	18″
255/50R19	29.0″	−0.2%	10.0″	5.0″	19″
255/45R20	29.0″	−0.2%	10.0″	4.5″	20″
255/40R21	29.0″	−0.2%	10.0″	4.0″	21″
235/65R17	29.0″	−0.2%	9.3″	6.0″	17″
235/55R19	29.2″	+0.3%	9.3″	5.1″	19″
235/70R16	29.0″	−0.5%	9.3″	6.5″	16″
225/75R16	29.3″	+0.6%	8.9″	6.6″	16″

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

285: Section width: 285 mm (11.2 in) from sidewall to sidewall.
45: Aspect ratio: the sidewall is 45% as tall as the tire is wide, 128 mm (5.0 in).
R: Radial construction, used by almost every modern tire.
19: Fits a 19-inch wheel.

285/45R19 is about 29.1 inches tall and 11.2 inches wide, on a 19-inch wheel, roughly a 29.1x11.2R19 in inch sizing.

Yes. At 29.1 inches it is sold and fitted as a 29-inch tire.

235/60R18, 295/35R21, 255/70R15 are the closest common sizes, all within 0.1% of its diameter, so the speedometer stays close to accurate.

255/55R19 is 3.2% taller, so at an indicated 60 mph you would really be doing 61.9 mph. Compare 285/45R19 and 255/55R19.

About 693 per mile (431 per km), from a 91.4-inch circumference.