285/80R16 Tire Size in Inches

34.0" tall, 11.2" wide, 9.0" sidewall

Diameter34.0"862 mm
Overall diameter34.0"862 mm
Section width11.2"285 mm
Sidewall height9.0"228 mm
Circumference106.7"2709 mm
Revolutions per mile594369 per km
Wheel diameter16"≈ 34.0x11.2R16 in inches

A 285/80R16 tire is 34.0 inches (862 mm) tall and 11.2 inches wide. The sidewall is 80% of the width, 9.0 inches, on a 16-inch wheel, and the tire turns about 594 times per mile.

In flotation terms that is about 34.0x11.2R16. People often call it a 34-inch tire.

The size most often compared with it is 305/75R16, which is 0.1" taller (+0.2%). At an indicated 60 mph you would be doing 60.1 mph on it.

285/80R16
305/75R16
Diameter difference+0.17%diameter 33.95" → 34.01"
CurrentNew
CurrentNewDifference

Speedometer

ShowsActual speed

Gear ratio to match

–enter your current axle ratio

Sizes near 285/80R16

Same 16" wheel, within 20 mm of width and 10 points of aspect ratio.

SizeDiameterWidthSidewallvs 285/80R16
305/75R1634.0"12.0"9.0"+0.2%
265/85R1633.7"10.4"8.9"−0.6%
275/85R1634.4"10.8"9.2"+1.3%
295/75R1633.4"11.6"8.7"−1.6%
275/80R1633.3"10.8"8.7"−1.9%
285/75R1632.8"11.2"8.4"−3.3%
285/85R1635.1"11.2"9.5"+3.3%
305/70R1632.8"12.0"8.4"−3.4%
265/80R1632.7"10.4"8.3"−3.7%
295/70R1632.3"11.6"8.1"−5.0%

Same height on a different wheel

Sizes within 2% of 34.0" on 18" or 17" wheels.

SizeDiameterWidthSidewallvs 285/80R16
255/80R1834.1"10.0"8.0"+0.3%
255/85R1734.1"10.0"8.5"+0.3%
285/75R1733.8"11.2"8.4"−0.4%
305/70R1733.8"12.0"8.4"−0.4%
315/65R1834.1"12.4"8.1"+0.5%
285/70R1833.7"11.2"7.9"−0.7%

Speedometer with a different size

Actual speed when the speedometer is calibrated for 285/80R16.

Speedometer showson 305/75R16on 265/85R16on 275/85R16
30 mph30.1 mph29.8 mph30.4 mph
45 mph45.1 mph44.7 mph45.6 mph
60 mph60.1 mph59.6 mph60.8 mph
70 mph70.1 mph69.6 mph70.9 mph

285/80R16 FAQ

How tall is a 285/80R16 tire?

34.0 inches (862 mm). The sidewall is 9.0 inches.

How wide is a 285/80R16 tire?

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

What is 285/80R16 in flotation size?

About 34.0x11.2R16.

Can I use 305/75R16 instead of 285/80R16?

305/75R16 is +0.2% in diameter, within the common 3% guideline. It is 0.8" wider.