What does 375/55R20 mean?
375/55R20 is a tire size with the following dimensions:
- 375 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.
- 20 is the diameter of the wheel in inches, on which the tire is to be mounted.
375/55R20 Tire Conversion
| Dimensions | Inches | Millimeters |
| Tire Diameter | 36.2 in | 920.5 mm |
| Section Width | 14.8 in | 375 mm |
| Rim Height | 20 in | 508 mm |
| Sidewall Height | 8.1 in | 206.3 mm |
| Circumference | 113.9 in | 2891.8 mm |
| Revolutions | 556.5 revs/mile | |
Not the tire size you are searching for? Try our Tire Size Calculator.
FAQ About 375/55R20 Tire
How tall is a 375/55R20 tire?
The height (or diameter) of a 375/55R20 tire is 36.2 inches
How wide is a 375/55R20 tire?
The width of a 375/55R20 tire is 375 mm, which is about 14.8 inches.
What size rim fits a 375/55R20 tire?
A 375/55R20 tire fits on a rim that is 20 inches in diameter.
What does the 55 in a 375/55R20 tire mean?
The 55 in a 375/55R20 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 55% of its width.
Alternative Tire Sizes for 375/55R20
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 375/55R20:
| Tire Size | Diameter | Rim |
|---|---|---|
| 325/60R20 | 35.4″ (-2.2%) | 20 x 9.0-10.0 |
| 355/60R20 | 36.8″ (1.7%) | 20 x 8.0-9.5 |