285/75R17 tire size

A 285/75R17 tire is 33.8 inches (859 mm) tall and 11.2 inches (285 mm) wide, and fits a 17-inch wheel. In inch sizing it is about a 33.8x11.2R17.

Overall diameter33.83in859 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
295/60R20	33.9″	+0.3%	11.6″	7.0″	20″
275/65R20	34.1″	+0.7%	10.8″	7.0″	20″
295/70R18	34.3″	+1.3%	11.6″	8.1″	18″
315/70R17	34.4″	+1.6%	12.4″	8.7″	17″
305/55R20	33.2″	−1.8%	12.0″	6.6″	20″
275/70R18	33.2″	−2.0%	10.8″	7.6″	18″
315/75R16	34.6″	+2.3%	12.4″	9.3″	16″
33x12.50R15	33.0″	−2.5%	12.5″	9.0″	15″
33x12.50R17	33.0″	−2.5%	12.5″	8.0″	17″
33x12.50R18	33.0″	−2.5%	12.5″	7.5″	18″
33x12.50R20	33.0″	−2.5%	12.5″	6.5″	20″
275/60R20	33.0″	−2.5%	10.8″	6.5″	20″

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.
75: Aspect ratio: the sidewall is 75% as tall as the tire is wide, 214 mm (8.4 in).
R: Radial construction, used by almost every modern tire.
17: Fits a 17-inch wheel.

285/75R17 is about 33.8 inches tall and 11.2 inches wide, on a 17-inch wheel, roughly a 33.8x11.2R17 in inch sizing.

Yes. At 33.8 inches it is sold and fitted as a 34-inch tire.

295/60R20, 275/65R20, 295/70R18 are the closest common sizes, all within 1.3% of its diameter, so the speedometer stays close to accurate.

35x12.50R17 is 3.5% taller, so at an indicated 60 mph you would really be doing 62.1 mph. Compare 285/75R17 and 35x12.50R17.

About 596 per mile (370 per km), from a 106.3-inch circumference.