30x9.50R15 Tire Size in Metric

30.0" tall, 9.5" wide on a 15" wheel

Diameter30.0"762 mm
Overall diameter30.0"762 mm
Section width9.5"241 mm
Sidewall height7.5"191 mm
Circumference94.2"2394 mm
Revolutions per mile672418 per km
Wheel diameter15"flotation size

A 30x9.50R15 tire is 30.0 inches tall and 9.5 inches wide and mounts on a 15-inch wheel, which leaves a 7.5-inch sidewall. It turns about 672 times per mile.

Metric sizes within half an inch of its height are 255/75R15 (30.1"), 295/65R15 (30.1"), 315/60R15 (29.9"), 275/70R15 (30.2"), 325/60R15 (30.4"), 265/70R15 (29.6"), 275/60R17 (30.0"), 235/70R17 (30.0"). 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 235/75R15, which is 1.1" shorter (−3.7%). At an indicated 60 mph you would be doing 57.8 mph on it, more than the 3% change many shops use as a limit.

30x9.50R15
235/75R15
Diameter difference−3.74%diameter 30.00" → 28.88"
CurrentNew
CurrentNewDifference

Speedometer

ShowsActual speed

Gear ratio to match

–enter your current axle ratio

Sizes near 30x9.50R15

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

SizeDiameterWidthSidewallvs 30x9.50R15
255/75R1530.1"10.0"7.5"+0.2%
245/75R1529.5"9.6"7.2"−1.8%
235/85R1530.7"9.3"7.9"+2.4%
255/70R1529.1"10.0"7.0"−3.1%
235/75R1528.9"9.3"6.9"−3.7%compare
245/70R1528.5"9.6"6.8"−5.0%
235/70R1528.0"9.3"6.5"−6.8%
255/85R1532.1"10.0"8.5"+6.9%
225/70R1527.4"8.9"6.2"−8.7%

Same height on a different wheel

Sizes within 2% of 30.0" on 17" or 16" or 14" wheels.

SizeDiameterWidthSidewallvs 30x9.50R15
275/60R1730.0"10.8"6.5"−0.0%
235/70R1730.0"9.3"6.5"−0.2%
255/65R1730.1"10.0"6.5"+0.2%
255/70R1630.1"10.0"7.0"+0.2%
255/80R1430.1"10.0"8.0"+0.2%
275/65R1630.1"10.8"7.0"+0.2%

Metric equivalents of 30x9.50R15

SizeDiameterWidthSidewallvs 30x9.50R15
255/75R1530.1"10.0"7.5"+0.2%
295/65R1530.1"11.6"7.5"+0.3%
315/60R1529.9"12.4"7.4"−0.4%
275/70R1530.2"10.8"7.6"+0.5%
325/60R1530.4"12.8"7.7"+1.2%
265/70R1529.6"10.4"7.3"−1.3%
275/60R1730.0"10.8"6.5"−0.0%
235/70R1730.0"9.3"6.5"−0.2%

Speedometer with a different size

Actual speed when the speedometer is calibrated for 30x9.50R15.

Speedometer showson 235/75R15on 255/75R15on 245/75R15
30 mph28.9 mph30.1 mph29.5 mph
45 mph43.3 mph45.1 mph44.2 mph
60 mph57.8 mph60.1 mph58.9 mph
70 mph67.4 mph70.1 mph68.8 mph

30x9.50R15 comparisons

30x9.50R15 FAQ

How tall is a 30x9.50R15 tire?

30.0 inches (762 mm), with a 7.5-inch sidewall on a 15-inch wheel.

What is 30x9.50R15 in metric?

Metric sizes of about the same height are 255/75R15 (30.1"), 295/65R15 (30.1"), 315/60R15 (29.9"), 275/70R15 (30.2").

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

About 672, or 418 per kilometer.