What does 145/80R12 mean?
145/80R12 is a tire size with the following dimensions:
- 145 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.
- 80 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.
- 12 is the diameter of the wheel in inches, on which the tire is to be mounted.
145/80R12 Tire Conversion
| Dimensions | Inches | Millimeters |
| Tire Diameter | 21.1 in | 536.8 mm |
| Section Width | 5.7 in | 145 mm |
| Rim Height | 12 in | 304 mm |
| Sidewall Height | 4.6 in | 116 mm |
| Circumference | 66.4 in | 1686.4 mm |
| Revolutions | 954.3 revs/mile | |
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FAQ About 145/80R12 Tire
How tall is a 145/80R12 tire?
The height (or diameter) of a 145/80R12 tire is 21.1 inches
How wide is a 145/80R12 tire?
The width of a 145/80R12 tire is 145 mm, which is about 5.7 inches.
What size rim fits a 145/80R12 tire?
A 145/80R12 tire fits on a rim that is 12 inches in diameter.
What does the 80 in a 145/80R12 tire mean?
The 80 in a 145/80R12 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 80% of its width.
Alternative Tire Sizes for 145/80R12
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 145/80R12:
| Tire Size | Diameter | Rim |
|---|---|---|
| 165/70R12 | 21.1″ (Equal) | 12 x 4.0-5.5 |
| 135/80R12 | 20.5″ (-2.8%) | 12 x 3.5-4.5 |
| 155/70R12 | 20.5″ (-2.8%) | 12 x 4.0-5.0 |