When converted to inches, 255/40R13 is equivalent to 21x10R13.
255/40R13 tire has a section width of 10 inches which is the measurement of tire's width from its inner sidewall to its outer sidewall. Rim diameter of 13 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 4 inches (102 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 21 inches (534 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 65.9 inches (1676.8 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. 255/40R13 tire makes 961 revolutions per mile (596 revolutions per kilometer).
Overall Diameter (Tire Height)
596 per km
961 per mile
Best Prices on 255/40R13 Tires
255/40R13 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 255/40R13 tire can be replaced with 34 compatible tire sizes. Select optional plus size to see its specs.