When converted to inches, 175/80R18 is equivalent to 29x6.9R18.
175/80R18 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 5.5 inches (140 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 29 inches (737 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 91.1 inches (2314.2 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. 175/80R18 tire makes 695 revolutions per mile (432 revolutions per kilometer).
Overall Diameter (Tire Height)
432 per km
695 per mile
Best Prices on 175/80R18 Tires
175/80R18 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 175/80R18 tire can be replaced with 52 compatible tire sizes. Select optional plus size to see its specs.