235/65R15 Tire Size in Inches

27.0" tall, 9.3" wide, 6.0" sidewall

Diameter27.0"687 mm
Overall diameter27.0"687 mm
Section width9.3"235 mm
Sidewall height6.0"153 mm
Circumference84.9"2157 mm
Revolutions per mile746464 per km
Wheel diameter15"≈ 27.0x9.3R15 in inches

A 235/65R15 tire is 27.0 inches (687 mm) tall and 9.3 inches wide. The sidewall is 65% of the width, 6.0 inches, on a 15-inch wheel, and the tire turns about 746 times per mile.

In flotation terms that is about 27.0x9.3R15. People often call it a 27-inch tire.

The size most often compared with it is 255/60R15, which is 0.0" taller (+0.1%). At an indicated 60 mph you would be doing 60.0 mph on it.

235/65R15
255/60R15
Diameter difference+0.07%diameter 27.03" → 27.05"
CurrentNew
CurrentNewDifference

Speedometer

ShowsActual speed

Gear ratio to match

–enter your current axle ratio

Sizes near 235/65R15

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

SizeDiameterWidthSidewallvs 235/65R15
255/60R1527.0"10.0"6.0"+0.1%
215/70R1526.9"8.5"5.9"−0.7%
225/70R1527.4"8.9"6.2"+1.4%
245/60R1526.6"9.6"5.8"−1.7%
215/75R1527.7"8.5"6.3"+2.5%
235/60R1526.1"9.3"5.6"−3.4%
235/70R1528.0"9.3"6.5"+3.4%
255/55R1526.0"10.0"5.5"−3.6%
215/65R1526.0"8.5"5.5"−3.8%
255/65R1528.1"10.0"6.5"+3.8%

Same height on a different wheel

Sizes within 2% of 27.0" on 14" or 17" wheels.

SizeDiameterWidthSidewallvs 235/65R15
255/65R1427.1"10.0"6.5"+0.1%
285/45R1727.1"11.2"5.0"+0.3%
215/75R1426.7"8.5"6.3"−1.2%
205/60R1726.7"8.1"4.8"−1.3%
265/50R1727.4"10.4"5.2"+1.5%
305/40R1726.6"12.0"4.8"−1.6%

Speedometer with a different size

Actual speed when the speedometer is calibrated for 235/65R15.

Speedometer showson 255/60R15on 215/70R15on 225/70R15
30 mph30.0 mph29.8 mph30.4 mph
45 mph45.0 mph44.7 mph45.6 mph
60 mph60.0 mph59.6 mph60.8 mph
70 mph70.1 mph69.5 mph71.0 mph

235/65R15 FAQ

How tall is a 235/65R15 tire?

27.0 inches (687 mm). The sidewall is 6.0 inches.

How wide is a 235/65R15 tire?

9.3 inches (235 mm) section width, measured sidewall to sidewall.

What is 235/65R15 in flotation size?

About 27.0x9.3R15.

Can I use 255/60R15 instead of 235/65R15?

255/60R15 is +0.1% in diameter, within the common 3% guideline. It is 0.8" wider.