What does 165/45R15 mean?
165/45R15 is a tire size with the following dimensions:
- 165 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.
- 15 is the diameter of the wheel in inches, on which the tire is to be mounted.
165/45R15 Tire Conversion
| Dimensions | Inches | Millimeters |
| Tire Diameter | 20.8 in | 529.5 mm |
| Section Width | 6.5 in | 165 mm |
| Rim Height | 15 in | 381 mm |
| Sidewall Height | 2.9 in | 74.3 mm |
| Circumference | 65.5 in | 1663.5 mm |
| Revolutions | 967.5 revs/mile | |
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FAQ About 165/45R15 Tire
How tall is a 165/45R15 tire?
The height (or diameter) of a 165/45R15 tire is 20.8 inches
How wide is a 165/45R15 tire?
The width of a 165/45R15 tire is 165 mm, which is about 6.5 inches.
What size rim fits a 165/45R15 tire?
A 165/45R15 tire fits on a rim that is 15 inches in diameter.
What does the 45 in a 165/45R15 tire mean?
The 45 in a 165/45R15 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 45% of its width.
Alternative Tire Sizes for 165/45R15
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 165/45R15:
| Tire Size | Diameter | Rim |
|---|---|---|
| 105/70R15 | 20.8″ (Equal) | 15 x n/a |
| 115/70R15 | 21.3″ (2.4%) | 15 x n/a |