235/70R17 tire size

A 235/70R17 tire is 30.0 inches (761 mm) tall and 9.3 inches (235 mm) wide, and fits a 17-inch wheel. In inch sizing it is about a 30.0x9.3R17.

Overall diameter29.95in761 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
30x9.50R15	30.0″	+0.2%	9.5″	7.5″	15″
235/75R16	29.9″	−0.2%	9.3″	6.9″	16″
235/65R18	30.0″	+0.2%	9.3″	6.0″	18″
255/50R20	30.0″	+0.3%	10.0″	5.0″	20″
255/55R19	30.0″	+0.3%	10.0″	5.5″	19″
255/60R18	30.0″	+0.3%	10.0″	6.0″	18″
255/65R17	30.1″	+0.3%	10.0″	6.5″	17″
285/35R22	29.9″	−0.3%	11.2″	3.9″	22″
255/70R16	30.1″	+0.3%	10.0″	7.0″	16″
275/45R20	29.7″	−0.7%	10.8″	4.9″	20″
235/55R20	30.2″	+0.7%	9.3″	5.1″	20″
245/50R20	29.6″	−1.0%	9.6″	4.8″	20″

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.
70: Aspect ratio: the sidewall is 70% as tall as the tire is wide, 165 mm (6.5 in).
R: Radial construction, used by almost every modern tire.
17: Fits a 17-inch wheel.

235/70R17 is about 30.0 inches tall and 9.3 inches wide, on a 17-inch wheel, roughly a 30.0x9.3R17 in inch sizing.

Yes. At 30.0 inches it is sold and fitted as a 30-inch tire.

30x9.50R15, 235/75R16, 235/65R18 are the closest common sizes, all within 0.2% of its diameter, so the speedometer stays close to accurate.

235/75R17 is 3.1% taller, so at an indicated 60 mph you would really be doing 61.9 mph. Compare 235/70R17 and 235/75R17.

About 673 per mile (418 per km), from a 94.1-inch circumference.