285/60R17 Tire Size in Inches

30.5" tall, 11.2" wide, 6.7" sidewall

Diameter30.5"774 mm
Overall diameter30.5"774 mm
Section width11.2"285 mm
Sidewall height6.7"171 mm
Circumference95.7"2431 mm
Revolutions per mile662411 per km
Wheel diameter17"≈ 30.5x11.2R17 in inches

A 285/60R17 tire is 30.5 inches (774 mm) tall and 11.2 inches wide. The sidewall is 60% of the width, 6.7 inches, on a 17-inch wheel, and the tire turns about 662 times per mile.

In flotation terms that is about 30.5x11.2R17. People often call it a 30-inch tire.

The size most often compared with it is 265/65R17, which is 0.1" taller (+0.3%). At an indicated 60 mph you would be doing 60.2 mph on it.

285/60R17
265/65R17
Diameter difference+0.32%diameter 30.46" → 30.56"
CurrentNew
CurrentNewDifference

Speedometer

ShowsActual speed

Gear ratio to match

–enter your current axle ratio

Sizes near 285/60R17

Same 17" wheel, within 20 mm of width and 10 points of aspect ratio.

SizeDiameterWidthSidewallvs 285/60R17
265/65R1730.6"10.4"6.8"+0.3%
305/55R1730.2"12.0"6.6"−0.8%
275/60R1730.0"10.8"6.5"−1.6%
275/65R1731.1"10.8"7.0"+2.0%
265/60R1729.5"10.4"6.3"−3.1%
305/60R1731.4"12.0"7.2"+3.1%
285/55R1729.3"11.2"6.2"−3.7%
285/65R1731.6"11.2"7.3"+3.7%
265/70R1731.6"10.4"7.3"+3.7%
275/55R1728.9"10.8"6.0"−5.1%

Same height on a different wheel

Sizes within 2% of 30.5" on 16" or 18" or 15" wheels.

SizeDiameterWidthSidewallvs 285/60R17
245/75R1630.5"9.6"7.2"+0.0%
215/85R1630.4"8.5"7.2"−0.2%
245/65R1830.5"9.6"6.3"+0.2%
325/60R1530.4"12.8"7.7"−0.4%
285/55R1830.3"11.2"6.2"−0.4%
285/65R1630.6"11.2"7.3"+0.4%

Speedometer with a different size

Actual speed when the speedometer is calibrated for 285/60R17.

Speedometer showson 265/65R17on 305/55R17on 275/60R17
30 mph30.1 mph29.7 mph29.5 mph
45 mph45.1 mph44.6 mph44.3 mph
60 mph60.2 mph59.5 mph59.1 mph
70 mph70.2 mph69.4 mph68.9 mph

285/60R17 FAQ

How tall is a 285/60R17 tire?

30.5 inches (774 mm). The sidewall is 6.7 inches.

How wide is a 285/60R17 tire?

11.2 inches (285 mm) section width, measured sidewall to sidewall.

What is 285/60R17 in flotation size?

About 30.5x11.2R17.

Can I use 265/65R17 instead of 285/60R17?

265/65R17 is +0.3% in diameter, within the common 3% guideline. It is 0.8" narrower.