285/55R18 in Inches

A 285/55R18 tire has a 30.3-inch diameter, a 11.2-inch width, and is designed for a 18-inch rim.

In high flotation terms, this tire is labeled as 30.3x11.2R18.

285/55R18 Tire Size
11.2"
30.3"
285/55R18 Tire Size in Inches
285/55R18 Tire Circumference
95.3"
18"
6.2"
664.7 revs/mile

285/55R18 Tire Overview

Height
30.3 inches
Wheel Diameter
18 inches
Tire Width
11.2 inches
Circumference
95.3 inches
Sidewall Height
6.2 inches
Revolutions
664.7 per mile
Tirelib.com

What does 285/55R18 mean?

285/55R18 tire size meaning in inches

285/55R18 is a tire size with the following dimensions:

  • 285 is the width of the tire in millimeters. This number also indicates the appropriate width of the rim on which the tire should be mounted.
  • 55 is the aspect ratio, which is the ratio of the tire's height to its width. This affects the tire's handling and ride comfort
  • R indicates the tire's construction type, meaning it has a radial construction. This provides stability and precision to the tire.
  • 18 is the diameter of the wheel in inches, on which the tire is to be mounted.

285/55R18 Tire Conversion

DimensionsInchesMillimeters
Tire Diameter30.3 in770.7 mm
Section Width11.2 in285 mm
Rim Height18 in457 mm
Sidewall Height6.2 in156.8 mm
Circumference95.3 in2421.2 mm
Revolutions664.7 revs/mile
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FAQ About 285/55R18 Tire

How tall is a 285/55R18 tire?

The height (or diameter) of a 285/55R18 tire is 30.3 inches

How wide is a 285/55R18 tire?

The width of a 285/55R18 tire is 285 mm, which is about 11.2 inches.

What size rim fits a 285/55R18 tire?

A 285/55R18 tire fits on a rim that is 18 inches in diameter.

What does the 55 in a 285/55R18 tire mean?

The 55 in a 285/55R18 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 55% of its width.


Alternative Tire Sizes for 285/55R18

Typically, it's recommended to choose a tire with a diameter (height) within 3% of the original equipment manufacturer (OEM) tire size.

However, keep in mind that this is a general guideline and not an absolute rule.

Here are some tire sizes that are compatible with the 285/55R18:

Tire SizeDiameterRim
165/90R1829.7″ (-2.0%)18 x n/a
175/90R1830.4″ (0.3%)18 x n/a
225/65R1829.5″ (-2.6%)18 x 6.0-8.0
235/65R1830.0″ (-1.0%)18 x 6.5-8.5
235/70R1831.0″ (2.3%)18 x 6.5-8.5
245/60R1829.6″ (-2.3%)18 x 7.0-8.5
245/65R1830.5″ (0.7%)18 x 7.0-8.5
255/60R1830.0″ (-1.0%)18 x 7.0-9.0
255/65R1831.1″ (2.6%)18 x 7.0-9.0
265/55R1829.5″ (-2.6%)18 x 7.5-9.5
265/60R1830.5″ (0.7%)18 x 7.5-9.5
275/55R1829.9″ (-1.3%)18 x 7.5-9.5
275/60R1831.0″ (2.3%)18 x 7.5-9.5
325/45R1829.5″ (-2.6%)18 x n/a