235/75R17 tire size

A 235/75R17 tire is 30.9 inches (784 mm) tall and 9.3 inches (235 mm) wide, and fits a 17-inch wheel. In inch sizing it is about a 30.9x9.3R17.

Overall diameter30.88in784 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
31x10.50R15	31.0″	+0.4%	10.5″	8.0″	15″
275/45R21	30.7″	−0.4%	10.8″	4.9″	21″
255/55R20	31.0″	+0.5%	10.0″	5.5″	20″
255/65R18	31.1″	+0.6%	10.0″	6.5″	18″
255/70R17	31.1″	+0.6%	10.0″	7.0″	17″
275/65R17	31.1″	+0.6%	10.8″	7.0″	17″
275/40R22	30.7″	−0.7%	10.8″	4.3″	22″
265/70R16	30.6″	−0.9%	10.4″	7.3″	16″
265/65R17	30.6″	−1.0%	10.4″	6.8″	17″
285/50R20	31.2″	+1.1%	11.2″	5.6″	20″
265/60R18	30.5″	−1.2%	10.4″	6.3″	18″
245/70R17	30.5″	−1.2%	9.6″	6.8″	17″

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

235: Section width: 235 mm (9.3 in) from sidewall to sidewall.
75: Aspect ratio: the sidewall is 75% as tall as the tire is wide, 176 mm (6.9 in).
R: Radial construction, used by almost every modern tire.
17: Fits a 17-inch wheel.

235/75R17 is about 30.9 inches tall and 9.3 inches wide, on a 17-inch wheel, roughly a 30.9x9.3R17 in inch sizing.

Yes. At 30.9 inches it is sold and fitted as a 31-inch tire.

31x10.50R15, 275/45R21, 255/55R20 are the closest common sizes, all within 0.5% of its diameter, so the speedometer stays close to accurate.

255/75R17 is 3.8% taller, so at an indicated 60 mph you would really be doing 62.3 mph. Compare 235/75R17 and 255/75R17.

About 653 per mile (406 per km), from a 97.0-inch circumference.