225/70R16 tire size

A 225/70R16 tire is 28.4 inches (721 mm) tall and 8.9 inches (225 mm) wide, and fits a 16-inch wheel. In inch sizing it is about a 28.4x8.9R16.

Overall diameter28.40in721 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
235/45R20	28.3″	−0.3%	9.3″	4.2″	20″
225/75R15	28.3″	−0.4%	8.9″	6.6″	15″
225/65R17	28.5″	+0.4%	8.9″	5.8″	17″
235/50R19	28.3″	−0.5%	9.3″	4.6″	19″
275/35R21	28.6″	+0.6%	10.8″	3.8″	21″
235/55R18	28.2″	−0.8%	9.3″	5.1″	18″
225/60R18	28.6″	+0.8%	8.9″	5.3″	18″
245/50R19	28.6″	+0.9%	9.6″	4.8″	19″
275/40R20	28.7″	+0.9%	10.8″	4.3″	20″
245/45R20	28.7″	+1.0%	9.6″	4.3″	20″
215/75R16	28.7″	+1.0%	8.5″	6.3″	16″
235/60R17	28.1″	−1.1%	9.3″	5.6″	17″

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

225: Section width: 225 mm (8.9 in) from sidewall to sidewall.
70: Aspect ratio: the sidewall is 70% as tall as the tire is wide, 158 mm (6.2 in).
R: Radial construction, used by almost every modern tire.
16: Fits a 16-inch wheel.

225/70R16 is about 28.4 inches tall and 8.9 inches wide, on a 16-inch wheel, roughly a 28.4x8.9R16 in inch sizing.

Nearly. It measures 28.4 inches, so it falls between 28 and 29 inches.

235/45R20, 225/75R15, 225/65R17 are the closest common sizes, all within 0.4% of its diameter, so the speedometer stays close to accurate.

225/75R16 is 3.1% taller, so at an indicated 60 mph you would really be doing 61.9 mph. Compare 225/70R16 and 225/75R16.

About 710 per mile (441 per km), from a 89.2-inch circumference.