285/55R17 Tire Size in Inches

29.3" tall, 11.2" wide, 6.2" sidewall

Diameter29.3"745 mm
Overall diameter29.3"745 mm
Section width11.2"285 mm
Sidewall height6.2"157 mm
Circumference92.2"2341 mm
Revolutions per mile687427 per km
Wheel diameter17"≈ 29.3x11.2R17 in inches

A 285/55R17 tire is 29.3 inches (745 mm) tall and 11.2 inches wide. The sidewall is 55% of the width, 6.2 inches, on a 17-inch wheel, and the tire turns about 687 times per mile.

In flotation terms that is about 29.3x11.2R17. People often call it a 29-inch tire.

The size most often compared with it is 265/60R17, which is 0.2" taller (+0.6%). At an indicated 60 mph you would be doing 60.4 mph on it.

285/55R17
265/60R17
Diameter difference+0.60%diameter 29.34" → 29.52"
CurrentNew
CurrentNewDifference

Speedometer

ShowsActual speed

Gear ratio to match

–enter your current axle ratio

Sizes near 285/55R17

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

SizeDiameterWidthSidewallvs 285/55R17
265/60R1729.5"10.4"6.3"+0.6%
275/55R1728.9"10.8"6.0"−1.5%
275/60R1730.0"10.8"6.5"+2.2%
305/55R1730.2"12.0"6.6"+3.0%
285/60R1730.5"11.2"6.7"+3.8%
265/65R1730.6"10.4"6.8"+4.2%
275/50R1727.8"10.8"5.4"−5.2%
275/65R1731.1"10.8"7.0"+5.9%
265/50R1727.4"10.4"5.2"−6.5%
305/60R1731.4"12.0"7.2"+7.0%

Same height on a different wheel

Sizes within 2% of 29.3" on 16" or 18" or 15" wheels.

SizeDiameterWidthSidewallvs 285/55R17
225/75R1629.3"8.9"6.6"−0.2%
285/50R1829.2"11.2"5.6"−0.4%
285/60R1629.5"11.2"6.7"+0.4%
245/75R1529.5"9.6"7.2"+0.4%
265/55R1829.5"10.4"5.7"+0.5%
245/70R1629.5"9.6"6.8"+0.6%

Speedometer with a different size

Actual speed when the speedometer is calibrated for 285/55R17.

Speedometer showson 265/60R17on 275/55R17on 275/60R17
30 mph30.2 mph29.6 mph30.7 mph
45 mph45.3 mph44.3 mph46.0 mph
60 mph60.4 mph59.1 mph61.3 mph
70 mph70.4 mph69.0 mph71.5 mph

285/55R17 FAQ

How tall is a 285/55R17 tire?

29.3 inches (745 mm). The sidewall is 6.2 inches.

How wide is a 285/55R17 tire?

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

What is 285/55R17 in flotation size?

About 29.3x11.2R17.

Can I use 265/60R17 instead of 285/55R17?

265/60R17 is +0.6% in diameter, within the common 3% guideline. It is 0.8" narrower.