What does 275/45R18 mean?
275/45R18 is a tire size with the following dimensions:
- 275 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.
- 45 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.
275/45R18 Tire Conversion
Dimensions | Inches | Millimeters |
Tire Diameter | 27.7 in | 704.7 mm |
Section Width | 10.8 in | 275 mm |
Rim Height | 18 in | 457 mm |
Sidewall Height | 4.9 in | 123.8 mm |
Circumference | 87.2 in | 2213.9 mm |
Revolutions | 726.9 revs/mile |
FAQ About 275/45R18 Tire
How tall is a 275/45R18 tire?
The height (or diameter) of a 275/45R18 tire is 27.7 inches
How wide is a 275/45R18 tire?
The width of a 275/45R18 tire is 275 mm, which is about 10.8 inches.
What size rim fits a 275/45R18 tire?
A 275/45R18 tire fits on a rim that is 18 inches in diameter.
What does the 45 in a 275/45R18 tire mean?
The 45 in a 275/45R18 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 45% of its width.
Alternative Tire Sizes for 275/45R18
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 275/45R18:
Tire Size | Diameter | Rim |
---|---|---|
145/85R18 | 27.7″ (Equal) | 18 x n/a |
205/60R18 | 27.7″ (Equal) | 18 x 5.0-7.5 |
225/55R18 | 27.7″ (Equal) | 18 x 6.0-8.0 |
145/80R18 | 27.1″ (-2.2%) | 18 x n/a |
155/80R18 | 27.8″ (0.4%) | 18 x n/a |
155/85R18 | 28.4″ (2.5%) | 18 x n/a |
165/70R18 | 27.1″ (-2.2%) | 18 x n/a |
205/55R18 | 26.9″ (-2.9%) | 18 x 5.5-7.5 |
215/55R18 | 27.3″ (-1.4%) | 18 x 6.0-7.5 |
225/50R18 | 26.9″ (-2.9%) | 18 x 6.0-8.0 |
235/50R18 | 27.3″ (-1.4%) | 18 x 6.5-8.5 |
235/55R18 | 28.2″ (1.8%) | 18 x 6.5-8.5 |
245/50R18 | 27.6″ (-0.4%) | 18 x 7.0-8.5 |
255/45R18 | 27.0″ (-2.5%) | 18 x 8.0-9.5 |
255/50R18 | 28.0″ (1.1%) | 18 x 7.0-9.0 |
265/45R18 | 27.4″ (-1.1%) | 18 x 8.5-10.0 |
265/50R18 | 28.4″ (2.5%) | 18 x 7.5-9.5 |
285/40R18 | 27.0″ (-2.5%) | 18 x 9.5-11.0 |
285/45R18 | 28.1″ (1.4%) | 18 x 9.0-10.5 |
295/40R18 | 27.3″ (-1.4%) | 18 x 10.0-11.5 |
295/45R18 | 28.5″ (2.9%) | 18 x 9.5-11.0 |
305/40R18 | 27.6″ (-0.4%) | 18 x 10.0-12.0 |
315/40R18 | 27.9″ (0.7%) | 18 x 10.5-12.5 |
325/35R18 | 27.0″ (-2.5%) | 18 x 11.0-13.0 |
335/35R18 | 27.2″ (-1.8%) | 18 x n/a |
345/35R18 | 27.5″ (-0.7%) | 18 x 11.5-13.5 |