When converted to inches, 325/45R18 is equivalent to 29.5x12.8R18.
325/45R18 tire has a section width of 12.8 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 5.7 inches (146 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 29.5 inches (749 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 92.6 inches (2351.9 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. 325/45R18 tire makes 684 revolutions per mile (425 revolutions per kilometer).
Overall Diameter (Tire Height)
425 per km
684 per mile
Best Prices on 325/45R18 Tires
325/45R18 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 325/45R18 tire can be replaced with 48 compatible tire sizes. Select optional plus size to see its specs.