325/60R18 Tire Size in Inches and Millimeters
325/60R18 tires have a diameter of 33.3" (847 mm), a tread width of 12.8" (325 mm), and a wheel diameter of 18" (457.2 mm).The sidewall of the tire is 7.7" (195 mm), and the tire's circumference is 104.6" (2659.6 mm). This means a 325/60R18 tire will make make 606 revolutions per mile, or 376 revolutions per kilometer.
| Spec | Inches | Metric |
|---|---|---|
| Diameter | 33.3" | 847 mm |
| Width | 12.8" | 325 mm |
| Wheel | 18" | 457.2 mm |
| Sidewall | 7.7" | 195 mm |
| Circum | 104.6" | 2659.6 mm |
| Revolutions | 606 per mile | 376 per km |
What Does 325/60R18 Mean?
The tire size 325/60R18 is a common size used on many trucks, SUVs, and other larger vehicles.
Here is what each part of the size designation represents:
- 325: This number represents the width of the tire in millimeters. In this case, the tire is 325 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.
- 18: 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 18-inch wheel.
How To Convert 325/60R18 Into Inches
The 325/60R18 conversion is fairly simple. The first number in the tire size, 325, represents the width of the tire in millimeters. To convert this to inches, we divide 325 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 12.8 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 12.8 by 0.60, which gives us approximately 7.7 inches.
Finally, the last number in the tire size, 18, represents the diameter of the wheel rim in inches. Therefore, the tire size 325/60R18 can be expressed in inches as roughly 12.8 inches wide, 7.7 inches tall, and designed to fit a 18-inch wheel rim.
Frequently Asked Questions About 325/60R18 Tires
How tall is a 325/60R18 tire?
A 325/60R18 tire has an approximate height, also known as the overall diameter, of 33.3 inches (847 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 325/60R18 tire?
A 325/60R18 tire has a width of approximately 12.8 inches (325 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “325”. 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 325/60R18 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.
| Size | Diameter | Width | Wheel |
|---|---|---|---|
| 235/85R17 | 32.8" | 832 mm | 17 mm |
| 255/80R17 | 33.1" | 840 mm | 17 mm |
| 255/85R16 | 33.1" | 840 mm | 16 mm |
| 265/50R22 | 32.5" | 825 mm | 22 mm |
| 265/60R20 | 32.5" | 826 mm | 20 mm |
| 265/70R18 | 32.6" | 829 mm | 18 mm |
| 265/80R16 | 32.7" | 830 mm | 16 mm |
| 275/25R28 | 33.4" | 849 mm | 28 mm |
| 275/50R22 | 32.9" | 835 mm | 22 mm |
| 275/55R22 | 33.9" | 861 mm | 22 mm |
| 275/60R20 | 33" | 838 mm | 20 mm |
| 275/65R20 | 34.1" | 866 mm | 20 mm |
| 275/70R18 | 33.2" | 843 mm | 18 mm |
| 275/80R17 | 34.3" | 872 mm | 17 mm |
| 285/40R24 | 33" | 838 mm | 24 mm |
| 285/50R22 | 33.3" | 845 mm | 22 mm |
| 285/55R20 | 32.4" | 822 mm | 20 mm |
| 285/60R20 | 33.5" | 850 mm | 20 mm |
| 285/65R18 | 32.6" | 827 mm | 18 mm |
| 285/70R17 | 32.8" | 832 mm | 17 mm |
| 285/70R18 | 33.7" | 857 mm | 18 mm |
| 285/75R16 | 32.8" | 834 mm | 16 mm |
| 285/75R17 | 33.9" | 860 mm | 17 mm |
| 295/25R28 | 33.8" | 859 mm | 28 mm |
| 295/30R26 | 33" | 838 mm | 26 mm |
| 295/40R24 | 33.3" | 846 mm | 24 mm |
| 295/45R22 | 32.5" | 825 mm | 22 mm |
| 295/50R22 | 33.7" | 855 mm | 22 mm |
| 295/55R20 | 32.8" | 832 mm | 20 mm |
| 295/60R20 | 33.9" | 862 mm | 20 mm |
| 295/65R18 | 33.1" | 841 mm | 18 mm |
| 295/70R17 | 33.3" | 846 mm | 17 mm |
| 295/70R18 | 34.3" | 871 mm | 18 mm |
| 295/75R16 | 33.4" | 848 mm | 16 mm |
| 305/30R26 | 33.2" | 844 mm | 26 mm |
| 305/35R24 | 32.4" | 824 mm | 24 mm |
| 305/40R23 | 32.6" | 828 mm | 23 mm |
| 305/40R24 | 33.6" | 854 mm | 24 mm |
| 305/45R22 | 32.8" | 833 mm | 22 mm |
| 305/50R22 | 34.1" | 865 mm | 22 mm |
| 305/55R20 | 33.2" | 844 mm | 20 mm |
| 305/60R18 | 32.4" | 823 mm | 18 mm |
| 305/65R17 | 32.6" | 828 mm | 17 mm |
| 305/65R18 | 33.6" | 853 mm | 18 mm |
| 305/70R16 | 32.8" | 834 mm | 16 mm |
| 305/70R17 | 33.9" | 860 mm | 17 mm |
| 305/75R16 | 34" | 864 mm | 16 mm |
| 315/35R24 | 32.7" | 830 mm | 24 mm |
| 315/45R22 | 33.2" | 843 mm | 22 mm |
| 315/50R20 | 32.4" | 824 mm | 20 mm |
| 315/70R15 | 32.4" | 823 mm | 15 mm |
| 315/70R16 | 33.4" | 848 mm | 16 mm |
| 325/45R22 | 33.5" | 851 mm | 22 mm |
| 325/50R20 | 32.8" | 834 mm | 20 mm |
| 325/60R18 | 33.3" | 847 mm | 18 mm |
| 345/60R18 | 34.3" | 871 mm | 18 mm |
| 355/40R22 | 33.2" | 843 mm | 22 mm |
| 355/50R20 | 34" | 864 mm | 20 mm |
| 375/45R20 | 33.3" | 846 mm | 20 mm |
| 375/50R18 | 32.8" | 833 mm | 18 mm |