275/40R22 tire size

A 275/40R22 tire is 30.7 inches (779 mm) tall and 10.8 inches (275 mm) wide, and fits a 22-inch wheel. In inch sizing it is about a 30.7x10.8R22.

Overall diameter30.66in779 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
265/70R16	30.6″	−0.2%	10.4″	7.3″	16″
275/45R21	30.7″	+0.3%	10.8″	4.9″	21″
265/65R17	30.6″	−0.3%	10.4″	6.8″	17″
265/60R18	30.5″	−0.5%	10.4″	6.3″	18″
245/70R17	30.5″	−0.5%	9.6″	6.8″	17″
245/75R16	30.5″	−0.6%	9.6″	7.2″	16″
235/75R17	30.9″	+0.7%	9.3″	6.9″	17″
265/50R20	30.4″	−0.7%	10.4″	5.2″	20″
265/40R22	30.3″	−1.0%	10.4″	4.2″	22″
31x10.50R15	31.0″	+1.1%	10.5″	8.0″	15″
255/55R20	31.0″	+1.2%	10.0″	5.5″	20″
255/65R18	31.1″	+1.3%	10.0″	6.5″	18″

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

275: Section width: 275 mm (10.8 in) from sidewall to sidewall.
40: Aspect ratio: the sidewall is 40% as tall as the tire is wide, 110 mm (4.3 in).
R: Radial construction, used by almost every modern tire.
22: Fits a 22-inch wheel.

275/40R22 is about 30.7 inches tall and 10.8 inches wide, on a 22-inch wheel, roughly a 30.7x10.8R22 in inch sizing.

Nearly. It measures 30.7 inches, so it falls between 30 and 31 inches.

265/70R16, 275/45R21, 265/65R17 are the closest common sizes, all within 0.3% of its diameter, so the speedometer stays close to accurate.

305/40R22 is 3.1% taller, so at an indicated 60 mph you would really be doing 61.8 mph. Compare 275/40R22 and 305/40R22.

About 658 per mile (409 per km), from a 96.3-inch circumference.