What does 255/30R30 mean?
255/30R30 is a tire size with the following dimensions:
- 255 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.
- 30 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.
- 30 is the diameter of the wheel in inches, on which the tire is to be mounted.
255/30R30 Tire Conversion
| Dimensions | Inches | Millimeters |
| Tire Diameter | 36 in | 915 mm |
| Section Width | 10 in | 255 mm |
| Rim Height | 30 in | 762 mm |
| Sidewall Height | 3 in | 76.5 mm |
| Circumference | 113.2 in | 2874.6 mm |
| Revolutions | 559.9 revs/mile | |
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FAQ About 255/30R30 Tire
How tall is a 255/30R30 tire?
The height (or diameter) of a 255/30R30 tire is 36 inches
How wide is a 255/30R30 tire?
The width of a 255/30R30 tire is 255 mm, which is about 10 inches.
What size rim fits a 255/30R30 tire?
A 255/30R30 tire fits on a rim that is 30 inches in diameter.
What does the 30 in a 255/30R30 tire mean?
The 30 in a 255/30R30 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 30% of its width.
Alternative Tire Sizes for 255/30R30
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 255/30R30:
| Tire Size | Diameter | Rim |
|---|---|---|
| 275/25R30 | 35.4″ (-1.7%) | 30 x n/a |
| 315/20R30 | 35.0″ (-2.8%) | 30 x n/a |