When converted to inches, 225/30R18 is equivalent to 23.3x8.9R18.
225/30R18 tire has a section width of 8.9 inches which is the measurement of tire's width from its inner sidewall to its outer sidewall. Rim diameter of 18 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 2.7 inches (68 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 23.3 inches (593 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 73.2 inches (1862 mm) is the outer perimeter of the tire. Tire revolutions indicate the number of times a tire revolves while it covers the distance in miles or kilometers. 225/30R18 tire makes 866 revolutions per mile (537 revolutions per kilometer).
Overall Diameter (Tire Height)
537 per km
866 per mile
Best Prices on 225/30R18 Tires
225/30R18 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 225/30R18 tire can be replaced with 7 compatible tire sizes. Select optional plus size to see its specs.