When converted to inches, 315/70R18 is equivalent to 35.4x12.4R18.
315/70R18 tire has a section width of 12.4 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 8.7 inches (221 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 35.4 inches (899 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 111.2 inches (2822.9 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. 315/70R18 tire makes 570 revolutions per mile (354 revolutions per kilometer).
Overall Diameter (Tire Height)
354 per km
570 per mile
Best Prices on 315/70R18 Tires
315/70R18 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 315/70R18 tire can be replaced with 14 compatible tire sizes. Select optional plus size to see its specs.