31x10.50R15 Tire Size in Metric

31.0" tall, 10.5" wide on a 15" wheel

Diameter31.0"787 mm
Overall diameter31.0"787 mm
Section width10.5"267 mm
Sidewall height8.0"203 mm
Circumference97.4"2474 mm
Revolutions per mile651404 per km
Wheel diameter15"flotation size

A 31x10.50R15 tire is 31.0 inches tall and 10.5 inches wide and mounts on a 15-inch wheel, which leaves a 8.0-inch sidewall. It turns about 651 times per mile.

Metric sizes within half an inch of its height are 275/75R15 (31.2"), 295/70R15 (31.3"), 235/85R15 (30.7"), 285/70R15 (30.7"), 265/75R15 (30.6"), 275/60R18 (31.0"), 285/40R22 (31.0"), 295/30R24 (31.0"). Metric tires are usually a little narrower than the flotation width suggests, so compare widths before you buy.

The size most often compared with it is 265/75R15, which is 0.4" shorter (−1.1%). At an indicated 60 mph you would be doing 59.3 mph on it.

31x10.50R15
265/75R15
Diameter difference−1.13%diameter 31.00" → 30.65"
CurrentNew
CurrentNewDifference

Speedometer

ShowsActual speed

Gear ratio to match

–enter your current axle ratio

Sizes near 31x10.50R15

Same 15" wheel, within 20 mm of width and 10 points of aspect ratio.

SizeDiameterWidthSidewallvs 31x10.50R15
275/75R1531.2"10.8"8.1"+0.8%
285/70R1530.7"11.2"7.9"−0.9%
265/75R1530.6"10.4"7.8"−1.1%compare
285/75R1531.8"11.2"8.4"+2.7%
275/70R1530.2"10.8"7.6"−2.7%
255/75R1530.1"10.0"7.5"−3.0%
255/85R1532.1"10.0"8.5"+3.4%
265/70R1529.6"10.4"7.3"−4.5%
265/85R1532.7"10.4"8.9"+5.6%
255/70R1529.1"10.0"7.0"−6.3%

Same height on a different wheel

Sizes within 2% of 31.0" on 17" or 16" wheels.

SizeDiameterWidthSidewallvs 31x10.50R15
255/70R1731.1"10.0"7.0"+0.2%
225/85R1631.1"8.9"7.5"+0.2%
255/75R1631.1"10.0"7.5"+0.2%
275/65R1731.1"10.8"7.0"+0.2%
275/70R1631.2"10.8"7.6"+0.5%
225/80R1731.2"8.9"7.1"+0.6%

Metric equivalents of 31x10.50R15

SizeDiameterWidthSidewallvs 31x10.50R15
275/75R1531.2"10.8"8.1"+0.8%
295/70R1531.3"11.6"8.1"+0.8%
235/85R1530.7"9.3"7.9"−0.9%
285/70R1530.7"11.2"7.9"−0.9%
265/75R1530.6"10.4"7.8"−1.1%compare
275/60R1831.0"10.8"6.5"−0.0%
285/40R2231.0"11.2"4.5"−0.1%
295/30R2431.0"11.6"3.5"−0.1%

Speedometer with a different size

Actual speed when the speedometer is calibrated for 31x10.50R15.

Speedometer showson 265/75R15on 235/75R15on 275/75R15
30 mph29.7 mph27.9 mph30.2 mph
45 mph44.5 mph41.9 mph45.3 mph
60 mph59.3 mph55.9 mph60.5 mph
70 mph69.2 mph65.2 mph70.5 mph

31x10.50R15 comparisons

31x10.50R15 FAQ

How tall is a 31x10.50R15 tire?

31.0 inches (787 mm), with a 8.0-inch sidewall on a 15-inch wheel.

What is 31x10.50R15 in metric?

Metric sizes of about the same height are 275/75R15 (31.2"), 295/70R15 (31.3"), 235/85R15 (30.7"), 285/70R15 (30.7").

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

About 651, or 404 per kilometer.