215/85R15 (original) (raw)
215/85R15
215/85R15 Tire Size in Inches and Millimeters
215/85R15 tires have a diameter of 29.4" (747 mm), a tread width of 8.5" (215 mm), and a wheel diameter of 15" (381 mm).The sidewall of the tire is 7.2" (183 mm), and the tire's circumference is 92.3" (2345.6 mm). This means a 215/85R15 tire will make make 686 revolutions per mile, or 426 revolutions per kilometer.
| Spec | Inches | Metric |
|---|---|---|
| Diameter | 29.4" | 747 mm |
| Width | 8.5" | 215 mm |
| Wheel | 15" | 381 mm |
| Sidewall | 7.2" | 183 mm |
| Circum | 92.3" | 2345.6 mm |
| Revolutions | 686 per mile | 426 per km |
What Does 215/85R15 Mean?
The tire size 215/85R15 is a common size used on many trucks, SUVs, and other larger vehicles.
Here is what each part of the size designation represents:
- 215: This number represents the width of the tire in millimeters. In this case, the tire is 215 millimeters wide.
- 85: 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 85% 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 215/85R15 Into Inches
The 215/85R15 conversion is fairly simple. The first number in the tire size, 215, represents the width of the tire in millimeters. To convert this to inches, we divide 215 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 8.5 inches.
The second number in the tire size, 85, represents the aspect ratio or the height of the tire as a percentage of its width. To calculate the height in inches, we multiply 8.5 by 0.85, which gives us approximately 7.2 inches.
Finally, the last number in the tire size, 15, represents the diameter of the wheel rim in inches. Therefore, the tire size 215/85R15 can be expressed in inches as roughly 8.5 inches wide, 7.2 inches tall, and designed to fit a 15-inch wheel rim.
Frequently Asked Questions About 215/85R15 Tires
How tall is a 215/85R15 tire?
A 215/85R15 tire has an approximate height, also known as the overall diameter, of 29.4 inches (747 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 215/85R15 tire?
A 215/85R15 tire has a width of approximately 8.5 inches (215 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “215”. 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 215/85R15 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.