When converted to inches, 175/45R18 is equivalent to 24.2x6.9R18.
175/45R18 tire has a section width of 6.9 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 3.1 inches (79 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 24.2 inches (615 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 76 inches (1931.1 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. 175/45R18 tire makes 834 revolutions per mile (518 revolutions per kilometer).
Overall Diameter (Tire Height)
518 per km
834 per mile
Best Prices on 175/45R18 Tires
175/45R18 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 175/45R18 tire can be replaced with 20 compatible tire sizes. Select optional plus size to see its specs.