When converted to inches, 155/85R18 is equivalent to 28.4x6.1R18.
155/85R18 tire has a section width of 6.1 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 5.2 inches (132 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 28.4 inches (721 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 89.2 inches (2263.9 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. 155/85R18 tire makes 710 revolutions per mile (442 revolutions per kilometer).
Overall Diameter (Tire Height)
442 per km
710 per mile
Best Prices on 155/85R18 Tires
155/85R18 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 155/85R18 tire can be replaced with 64 compatible tire sizes. Select optional plus size to see its specs.