31x10.50R15 tire size

A 31x10.50R15 tire is 31.0 inches (787 mm) tall and 10.5 inches (267 mm) wide, and fits a 15-inch wheel. The closest metric size is 265/75R15, 30.6 in tall.

Overall diameter31.00in787 mm

	Inches	Millimetres
Section width	10.50 in	267 mm
Sidewall height	8.00 in	203 mm
Wheel diameter	15 in	381 mm
Circumference	97.4 in	2474 mm
Revs per mile / km	651	404

Drawn to scale from the nominal size.

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Compare 31x10.50R15 with

255/55R20 +0.1%255/65R18 +0.2%255/70R17 +0.2%275/65R17 +0.2%235/75R17 −0.4%285/50R20 +0.7%30x9.50R15 −3.2%32x11.50R15 +3.2%255/70R15 −6.3%33x12.50R15 +6.5%235/75R15 −6.8%

Sizes within 3% of 31x10.50R15

Size	Diameter	Difference	Width	Sidewall	Wheel
255/55R20	31.0″	+0.1%	10.0″	5.5″	20″
255/65R18	31.1″	+0.2%	10.0″	6.5″	18″
255/70R17	31.1″	+0.2%	10.0″	7.0″	17″
275/65R17	31.1″	+0.2%	10.8″	7.0″	17″
235/75R17	30.9″	−0.4%	9.3″	6.9″	17″
285/50R20	31.2″	+0.7%	11.2″	5.6″	20″
275/45R21	30.7″	−0.8%	10.8″	4.9″	21″
275/40R22	30.7″	−1.1%	10.8″	4.3″	22″
265/70R16	30.6″	−1.3%	10.4″	7.3″	16″
265/65R17	30.6″	−1.4%	10.4″	6.8″	17″
245/75R17	31.5″	+1.5%	9.6″	7.2″	17″
265/60R18	30.5″	−1.5%	10.4″	6.3″	18″

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

What 31x10.50R15 means

31: Overall height: 31.0 in (787 mm).
10.50: Section width: 10.50 in (267 mm).
R: Radial construction.
15: Fits a 15-inch wheel. Inch sizes like this are light-truck (LT) tires.

31x10.50R15 questions

What is 31x10.50R15 in inches?

31x10.50R15 is about 31.0 inches tall and 10.5 inches wide, on a 15-inch wheel.

Is 31x10.50R15 a 31 inch tire?

Yes. At 31.0 inches it is sold and fitted as a 31-inch tire.

What size can replace 31x10.50R15?

255/55R20, 255/65R18, 255/70R17 are the closest common sizes, all within 0.2% of its diameter, so the speedometer stays close to accurate.

How much bigger is 32x11.50R15?

32x11.50R15 is 3.2% taller, so at an indicated 60 mph you would really be doing 61.9 mph. Compare 31x10.50R15 and 32x11.50R15.

How many revolutions per mile does 31x10.50R15 make?

About 651 per mile (404 per km), from a 97.4-inch circumference.