When converted to inches, 135/80R12 is equivalent to 20.5x5.3R12.
135/80R12 tire has a section width of 5.3 inches which is the measurement of tire's width from its inner sidewall to its outer sidewall. Rim diameter of 12 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 4.3 inches (108 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 20.5 inches (521 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 64.4 inches (1635.9 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. 135/80R12 tire makes 984 revolutions per mile (611 revolutions per kilometer).
Overall Diameter (Tire Height)
611 per km
984 per mile
Best Prices on 135/80R12 Tires
135/80R12 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 135/80R12 tire can be replaced with 26 compatible tire sizes. Select optional plus size to see its specs.