What does 145/70R12 mean?
145/70R12 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.
- 70 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.
145/70R12 Tire Conversion
| Dimensions | Inches | Millimeters |
| Tire Diameter | 20 in | 507.8 mm |
| Section Width | 5.7 in | 145 mm |
| Rim Height | 12 in | 304 mm |
| Sidewall Height | 4 in | 101.5 mm |
| Circumference | 62.8 in | 1595.3 mm |
| Revolutions | 1008.8 revs/mile | |
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FAQ About 145/70R12 Tire
How tall is a 145/70R12 tire?
The height (or diameter) of a 145/70R12 tire is 20 inches
How wide is a 145/70R12 tire?
The width of a 145/70R12 tire is 145 mm, which is about 5.7 inches.
What size rim fits a 145/70R12 tire?
A 145/70R12 tire fits on a rim that is 12 inches in diameter.
What does the 70 in a 145/70R12 tire mean?
The 70 in a 145/70R12 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 70% of its width.
Alternative Tire Sizes for 145/70R12
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 145/70R12:
| Tire Size | Diameter | Rim |
|---|---|---|
| 125/80R12 | 19.9″ (-0.5%) | 12 x n/a |
| 135/80R12 | 20.5″ (2.5%) | 12 x 3.5-4.5 |
| 155/70R12 | 20.5″ (2.5%) | 12 x 4.0-5.0 |
| 165/60R12 | 19.8″ (-1.0%) | 12 x 4.5-6.0 |