295/35R21 tire size

A 295/35R21 tire is 29.1 inches (740 mm) tall and 11.6 inches (295 mm) wide, and fits a 21-inch wheel. In inch sizing it is about a 29.1x11.6R21.

Overall diameter29.13in740 mm

Drawn to scale from the nominal size.

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Size	Diameter	Difference	Width	Sidewall	Wheel
235/60R18	29.1″	−0.1%	9.3″	5.6″	18″
285/45R19	29.1″	−0.1%	11.2″	5.0″	19″
235/55R19	29.2″	+0.2%	9.3″	5.1″	19″
255/70R15	29.1″	−0.3%	10.0″	7.0″	15″
255/65R16	29.1″	−0.3%	10.0″	6.5″	16″
255/55R18	29.0″	−0.3%	10.0″	5.5″	18″
255/50R19	29.0″	−0.3%	10.0″	5.0″	19″
255/45R20	29.0″	−0.3%	10.0″	4.5″	20″
255/40R21	29.0″	−0.3%	10.0″	4.0″	21″
235/65R17	29.0″	−0.4%	9.3″	6.0″	17″
225/75R16	29.3″	+0.5%	8.9″	6.6″	16″
265/35R22	29.3″	+0.6%	10.4″	3.7″	22″

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

295: Section width: 295 mm (11.6 in) from sidewall to sidewall.
35: Aspect ratio: the sidewall is 35% as tall as the tire is wide, 103 mm (4.1 in).
R: Radial construction, used by almost every modern tire.
21: Fits a 21-inch wheel.

295/35R21 is about 29.1 inches tall and 11.6 inches wide, on a 21-inch wheel, roughly a 29.1x11.6R21 in inch sizing.

Yes. At 29.1 inches it is sold and fitted as a 29-inch tire.

235/60R18, 285/45R19, 235/55R19 are the closest common sizes, all within 0.2% of its diameter, so the speedometer stays close to accurate.

275/45R21 is 5.5% taller, so at an indicated 60 mph you would really be doing 63.3 mph. Compare 295/35R21 and 275/45R21.

About 692 per mile (430 per km), from a 91.5-inch circumference.