285/65R18 Tire Size in Inches and Millimeters
285/65R18 tires have a diameter of 32.6" (827 mm), a tread width of 11.2" (285 mm), and a wheel diameter of 18" (457.2 mm).The sidewall of the tire is 7.3" (185 mm), and the tire's circumference is 102.4" (2596.8 mm). This means a 285/65R18 tire will make make 619 revolutions per mile, or 385 revolutions per kilometer.
Spec | Inches | Metric |
---|---|---|
Diameter | 32.6" | 827 mm |
Width | 11.2" | 285 mm |
Wheel | 18" | 457.2 mm |
Sidewall | 7.3" | 185 mm |
Circum | 102.4" | 2596.8 mm |
Revolutions | 619 per mile | 385 per km |
What Does 285/65R18 Mean?
The tire size 285/65R18 is a common size used on many trucks, SUVs, and other larger vehicles.
Here is what each part of the size designation represents:
- 285: This number represents the width of the tire in millimeters. In this case, the tire is 285 millimeters wide.
- 65: 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 65% 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 285/65R18 Into Inches
The 285/65R18 conversion is fairly simple. The first number in the tire size, 285, represents the width of the tire in millimeters. To convert this to inches, we divide 285 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 11.2 inches.
The second number in the tire size, 65, represents the aspect ratio or the height of the tire as a percentage of its width. To calculate the height in inches, we multiply 11.2 by 0.65, which gives us approximately 7.3 inches.
Finally, the last number in the tire size, 18, represents the diameter of the wheel rim in inches. Therefore, the tire size 285/65R18 can be expressed in inches as roughly 11.2 inches wide, 7.3 inches tall, and designed to fit a 18-inch wheel rim.
Frequently Asked Questions About 285/65R18 Tires
How tall is a 285/65R18 tire?
A 285/65R18 tire has an approximate height, also known as the overall diameter, of 32.6 inches (827 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 285/65R18 tire?
A 285/65R18 tire has a width of approximately 11.2 inches (285 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “285”. 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 285/65R18 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 |
---|---|---|---|
225/90R16 | 32" | 812 mm | 16 mm |
235/75R18 | 31.9" | 809 mm | 18 mm |
235/80R17 | 31.8" | 808 mm | 17 mm |
235/85R16 | 31.7" | 806 mm | 16 mm |
235/85R17 | 32.8" | 832 mm | 17 mm |
255/30R26 | 32" | 814 mm | 26 mm |
255/60R20 | 32" | 814 mm | 20 mm |
255/65R19 | 32.1" | 815 mm | 19 mm |
255/70R18 | 32.1" | 815 mm | 18 mm |
255/75R17 | 32" | 814 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 |
265/70R17 | 31.7" | 804 mm | 17 mm |
265/70R18 | 32.6" | 829 mm | 18 mm |
265/75R16 | 31.7" | 804 mm | 16 mm |
265/80R16 | 32.7" | 830 mm | 16 mm |
275/25R28 | 33.4" | 849 mm | 28 mm |
275/40R23 | 31.7" | 804 mm | 23 mm |
275/45R22 | 31.8" | 807 mm | 22 mm |
275/50R21 | 31.9" | 809 mm | 21 mm |
275/50R22 | 32.9" | 835 mm | 22 mm |
275/55R20 | 31.9" | 810 mm | 20 mm |
275/60R20 | 33" | 838 mm | 20 mm |
275/65R18 | 32.1" | 815 mm | 18 mm |
275/70R17 | 32.2" | 818 mm | 17 mm |
275/70R18 | 33.2" | 843 mm | 18 mm |
285/35R24 | 31.9" | 810 mm | 24 mm |
285/40R23 | 32" | 812 mm | 23 mm |
285/40R24 | 33" | 838 mm | 24 mm |
285/45R22 | 32.1" | 815 mm | 22 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 |
285/70R16 | 31.7" | 806 mm | 16 mm |
285/70R17 | 32.8" | 832 mm | 17 mm |
285/75R16 | 32.8" | 834 mm | 16 mm |
295/25R26 | 31.8" | 808 mm | 26 mm |
295/30R26 | 33" | 838 mm | 26 mm |
295/35R24 | 32.1" | 816 mm | 24 mm |
295/40R24 | 33.3" | 846 mm | 24 mm |
295/45R22 | 32.5" | 825 mm | 22 mm |
295/50R20 | 31.7" | 804 mm | 20 mm |
295/55R20 | 32.8" | 832 mm | 20 mm |
295/65R18 | 33.1" | 841 mm | 18 mm |
295/70R17 | 33.3" | 846 mm | 17 mm |
295/75R16 | 33.4" | 848 mm | 16 mm |
305/25R26 | 32" | 812 mm | 26 mm |
305/30R26 | 33.2" | 844 mm | 26 mm |
305/35R24 | 32.4" | 824 mm | 24 mm |
305/40R22 | 31.6" | 803 mm | 22 mm |
305/40R23 | 32.6" | 828 mm | 23 mm |
305/45R22 | 32.8" | 833 mm | 22 mm |
305/50R20 | 32" | 814 mm | 20 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 |
305/70R15 | 31.9" | 809 mm | 15 mm |
305/70R16 | 32.8" | 834 mm | 16 mm |
315/35R24 | 32.7" | 830 mm | 24 mm |
315/45R21 | 32.2" | 817 mm | 21 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 |
325/35R23 | 32" | 812 mm | 23 mm |
325/40R22 | 32.2" | 819 mm | 22 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 |
335/30R24 | 32" | 812 mm | 24 mm |
345/55R17 | 32" | 812 mm | 17 mm |
355/40R22 | 33.2" | 843 mm | 22 mm |
375/45R20 | 33.3" | 846 mm | 20 mm |
375/50R18 | 32.8" | 833 mm | 18 mm |
375/55R16 | 32.2" | 818 mm | 16 mm |
405/25R24 | 32" | 812 mm | 24 mm |