30x9.50R15 tire size

A 30x9.50R15 tire is 30.0 inches (762 mm) tall and 9.5 inches (241 mm) wide, and fits a 15-inch wheel. The closest metric size is 245/80R15, 30.4 in tall.

Overall diameter30.00in762 mm

	Inches	Millimetres
Section width	9.50 in	241 mm
Sidewall height	7.50 in	191 mm
Wheel diameter	15 in	381 mm
Circumference	94.2 in	2394 mm
Revs per mile / km	672	418

Drawn to scale from the nominal size.

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Compare 30x9.50R15 with

235/65R18 +0.1%255/50R20 +0.1%255/55R19 +0.1%235/70R17 −0.2%235/75R16 −0.4%285/35R22 −0.5%255/70R15 −3.1%31x10.50R15 +3.3%235/75R15 −3.7%225/75R15 −5.7%32x11.50R15 +6.7%215/75R15 −7.7%

Sizes within 3% of 30x9.50R15

Size	Diameter	Difference	Width	Sidewall	Wheel
235/65R18	30.0″	+0.1%	9.3″	6.0″	18″
255/50R20	30.0″	+0.1%	10.0″	5.0″	20″
255/55R19	30.0″	+0.1%	10.0″	5.5″	19″
235/70R17	30.0″	−0.2%	9.3″	6.5″	17″
255/60R18	30.0″	+0.2%	10.0″	6.0″	18″
255/65R17	30.1″	+0.2%	10.0″	6.5″	17″
255/70R16	30.1″	+0.2%	10.0″	7.0″	16″
235/75R16	29.9″	−0.4%	9.3″	6.9″	16″
285/35R22	29.9″	−0.5%	11.2″	3.9″	22″
235/55R20	30.2″	+0.6%	9.3″	5.1″	20″
275/45R20	29.7″	−0.9%	10.8″	4.9″	20″
265/40R22	30.3″	+1.2%	10.4″	4.2″	22″

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

What 30x9.50R15 means

30: Overall height: 30.0 in (762 mm).
9.50: Section width: 9.50 in (241 mm).
R: Radial construction.
15: Fits a 15-inch wheel. Inch sizes like this are light-truck (LT) tires.

30x9.50R15 questions

What is 30x9.50R15 in inches?

30x9.50R15 is about 30.0 inches tall and 9.5 inches wide, on a 15-inch wheel.

Is 30x9.50R15 a 30 inch tire?

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

What size can replace 30x9.50R15?

235/65R18, 255/50R20, 255/55R19 are the closest common sizes, all within 0.1% of its diameter, so the speedometer stays close to accurate.

How much bigger is 31x10.50R15?

31x10.50R15 is 3.3% taller, so at an indicated 60 mph you would really be doing 62.0 mph. Compare 30x9.50R15 and 31x10.50R15.

How many revolutions per mile does 30x9.50R15 make?

About 672 per mile (418 per km), from a 94.2-inch circumference.