165/55R15 (original) (raw)
165/55R15
165/55R15 Tire Size in Inches and Millimeters
165/55R15 tires have a diameter of 22.2" (563 mm), a tread width of 6.5" (165 mm), and a wheel diameter of 15" (381 mm).The sidewall of the tire is 3.6" (91 mm), and the tire's circumference is 69.7" (1767.8 mm). This means a 165/55R15 tire will make make 909 revolutions per mile, or 566 revolutions per kilometer.
| Spec | Inches | Metric |
|---|---|---|
| Diameter | 22.2" | 563 mm |
| Width | 6.5" | 165 mm |
| Wheel | 15" | 381 mm |
| Sidewall | 3.6" | 91 mm |
| Circum | 69.7" | 1767.8 mm |
| Revolutions | 909 per mile | 566 per km |
What Does 165/55R15 Mean?
The tire size 165/55R15 is a common size used on many trucks, SUVs, and other larger vehicles.
Here is what each part of the size designation represents:
- 165: This number represents the width of the tire in millimeters. In this case, the tire is 165 millimeters wide.
- 55: This number represents the aspect ratio of the tire, which is the height of the tire's sidewall as a percentage of its width. In this case, the sidewall height is 55% of the tire's width.
- R: This letter indicates the tire's construction type. “R” stands for radial construction, which is the most common type of tire construction today.
- 15: This number represents the diameter of the wheel that the tire is designed to fit on, in inches. In this case, the tire is designed to fit on a 15-inch wheel.
How To Convert 165/55R15 Into Inches
The 165/55R15 conversion is fairly simple. The first number in the tire size, 165, represents the width of the tire in millimeters. To convert this to inches, we divide 165 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 6.5 inches.
The second number in the tire size, 55, represents the aspect ratio or the height of the tire as a percentage of its width. To calculate the height in inches, we multiply 6.5 by 0.55, which gives us approximately 3.6 inches.
Finally, the last number in the tire size, 15, represents the diameter of the wheel rim in inches. Therefore, the tire size 165/55R15 can be expressed in inches as roughly 6.5 inches wide, 3.6 inches tall, and designed to fit a 15-inch wheel rim.
Frequently Asked Questions About 165/55R15 Tires
How tall is a 165/55R15 tire?
A 165/55R15 tire has an approximate height, also known as the overall diameter, of 22.2 inches (563 mm). This height can vary slightly depending on the brand and model of the tire, as well as the amount of air pressure in the tire.
How wide is a 165/55R15 tire?
A 165/55R15 tire has a width of approximately 6.5 inches (165 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “165”. It’s important to note that the actual width of the tire may vary slightly depending on the brand and model of the tire, and the width may also be affected by the amount of air pressure in the tire.
Alternate 165/55R15 Replacement Tire Sizes
Upsizing your wheels or tires? Replacement tires must be within 3% of the diametor of the original tire. The following sizes fall within that range - click on any size to see detailed info about that tire and wheel combination.