255/70R18 in Inches

Tire size 255/70R18 refers to the tire size in numbers and letters such as the first number “255” indicates the tire width in millimeters, the second number “70” indicates the aspect ratio of the tire and the last number indicates the diameter of the tire. A 255/70R18 tire in inches can be described as a tire with a width of about 10 inches, a sidewall height of about 7 inches, and it fits on a 18-inch wheel.

Converting 255/70R18 in Inches

255/70R18inchesmm
Tire Diameter32.1 inches815 mm
Tread Width10 inches255 mm
Rim Diameter18 inches457 mm
Sidewall Height7 inches179 mm
Circumference100.8 inches2559 mm
Revolutions629 per mile391 per km

Tire Size Calculator

The Tire Size Calculator is a convenient online tool that helps determine the correct tire dimensions for a vehicle, ensuring optimal performance and compatibility.

Tire Diameter
Tread Width
Rim Diameter
Sidewall Height
Circumference
Revolutions

255/70R18 Alternate Tire Size

Tire Size Overall Diameter Difference
285/50R20 31.3″ (794 mm) -2.6%
225/75R18 31.3″ (795 mm) -2.5%
285/55R19 31.4″ (797 mm) -2.2%
285/60R18 31.5″ (799 mm) -2%
265/65R18 31.5″ (801 mm) -1.7%
245/70R18 31.5″ (801 mm) -1.7%
245/60R20 31.6″ (802 mm) -1.6%
295/50R20 31.7″ (804 mm) -1.3%
235/75R18 31.9″ (809 mm) -0.7%
275/55R20 31.9″ (810 mm) -0.6%
225/70R19.5 31.9″ (811 mm) -0.5%
305/50R20 32″ (814 mm) -0.1%
255/60R20 32″ (814 mm) -0.1%
275/65R18 32.1″ (815 mm) 0%
255/65R19 32.1″ (815 mm) 0%
285/55R20 32.4″ (822 mm) 0.9%
305/60R18 32.4″ (823 mm) 1%
315/50R20 32.4″ (824 mm) 1.1%
265/60R20 32.5″ (826 mm) 1.3%
285/65R18 32.6″ (827 mm) 1.5%
265/70R18 32.6″ (829 mm) 1.7%
295/55R20 32.8″ (832 mm) 2.1%
375/50R18 32.8″ (833 mm) 2.2%
325/50R20 32.8″ (834 mm) 2.3%
275/60R20 33″ (838 mm) 2.8%
245/70R19.5 33″ (839 mm) 2.9%

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