145/60R20 (original) (raw)
145/60R20
145/60R20 Tire Size in Inches and Millimeters
145/60R20 tires have a diameter of 26.9" (682 mm), a tread width of 5.7" (145 mm), and a wheel diameter of 20" (508 mm).The sidewall of the tire is 3.4" (87 mm), and the tire's circumference is 84.5" (2141.5 mm). This means a 145/60R20 tire will make make 750 revolutions per mile, or 467 revolutions per kilometer.
| Spec | Inches | Metric |
|---|---|---|
| Diameter | 26.9" | 682 mm |
| Width | 5.7" | 145 mm |
| Wheel | 20" | 508 mm |
| Sidewall | 3.4" | 87 mm |
| Circum | 84.5" | 2141.5 mm |
| Revolutions | 750 per mile | 467 per km |
What Does 145/60R20 Mean?
The tire size 145/60R20 is a common size used on many trucks, SUVs, and other larger vehicles.
Here is what each part of the size designation represents:
- 145: This number represents the width of the tire in millimeters. In this case, the tire is 145 millimeters wide.
- 60: 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 60% 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.
- 20: 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 20-inch wheel.
How To Convert 145/60R20 Into Inches
The 145/60R20 conversion is fairly simple. The first number in the tire size, 145, represents the width of the tire in millimeters. To convert this to inches, we divide 145 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 5.7 inches.
The second number in the tire size, 60, represents the aspect ratio or the height of the tire as a percentage of its width. To calculate the height in inches, we multiply 5.7 by 0.60, which gives us approximately 3.4 inches.
Finally, the last number in the tire size, 20, represents the diameter of the wheel rim in inches. Therefore, the tire size 145/60R20 can be expressed in inches as roughly 5.7 inches wide, 3.4 inches tall, and designed to fit a 20-inch wheel rim.
Frequently Asked Questions About 145/60R20 Tires
How tall is a 145/60R20 tire?
A 145/60R20 tire has an approximate height, also known as the overall diameter, of 26.9 inches (682 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 145/60R20 tire?
A 145/60R20 tire has a width of approximately 5.7 inches (145 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “145”. 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 145/60R20 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.