What does 285/55R18 mean?
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
Dimensions | Inches | Millimeters |
Tire Diameter | 30.3 in | 770.7 mm |
Section Width | 11.2 in | 285 mm |
Rim Height | 18 in | 457 mm |
Sidewall Height | 6.2 in | 156.8 mm |
Circumference | 95.3 in | 2421.2 mm |
Revolutions | 664.7 revs/mile |
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 Size | Diameter | Rim |
---|---|---|
165/90R18 | 29.7″ (-2.0%) | 18 x n/a |
175/90R18 | 30.4″ (0.3%) | 18 x n/a |
225/65R18 | 29.5″ (-2.6%) | 18 x 6.0-8.0 |
235/65R18 | 30.0″ (-1.0%) | 18 x 6.5-8.5 |
235/70R18 | 31.0″ (2.3%) | 18 x 6.5-8.5 |
245/60R18 | 29.6″ (-2.3%) | 18 x 7.0-8.5 |
245/65R18 | 30.5″ (0.7%) | 18 x 7.0-8.5 |
255/60R18 | 30.0″ (-1.0%) | 18 x 7.0-9.0 |
255/65R18 | 31.1″ (2.6%) | 18 x 7.0-9.0 |
265/55R18 | 29.5″ (-2.6%) | 18 x 7.5-9.5 |
265/60R18 | 30.5″ (0.7%) | 18 x 7.5-9.5 |
275/55R18 | 29.9″ (-1.3%) | 18 x 7.5-9.5 |
275/60R18 | 31.0″ (2.3%) | 18 x 7.5-9.5 |
325/45R18 | 29.5″ (-2.6%) | 18 x n/a |