235/75R18 Tires

235/75R18 Conversion

When converted to inches, 235/75R18 is equivalent to 31.9x9.3R18.

235/75R18 tire has a section width of 9.3 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 6.9 inches (176 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 31.9 inches (809 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 100.2 inches (2540.3 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. 235/75R18 tire makes 632 revolutions per mile (394 revolutions per kilometer).

235/75R18 Section Width
9.3"
31.9"
235/75R18 Tire Side
Tire Circumference
100.2"
18"
6.9"
632 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 809 mm 31.9"
Tread Width 235 mm 9.3"
Rim Diameter 457.2 mm 18"
Sidewall Height 176 mm 6.9"
Circumference 2540.3 mm 100.2"
Revolutions 394 per km 632 per mile

235/75R18 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 235/75R18 tire can be replaced with 30 compatible tire sizes. Select optional plus size to see its specs.

Tire Size Overall Diameter Difference
275/55R19 30.9" (785 mm) -3%
275/60R18 31" (787 mm) -2.7%
235/70R18 31" (787 mm) -2.7%
255/55R20 31" (788 mm) -2.6%
255/65R18 31.1" (789 mm) -2.5%
255/60R19 31.1" (789 mm) -2.5%
235/65R19 31.1" (789 mm) -2.5%
285/50R20 31.3" (794 mm) -1.9%
225/75R18 31.3" (795 mm) -1.7%
285/55R19 31.4" (797 mm) -1.5%
285/60R18 31.5" (799 mm) -1.2%
245/70R18 31.5" (801 mm) -1%
265/65R18 31.5" (801 mm) -1%
245/60R20 31.6" (802 mm) -0.9%
295/50R20 31.7" (804 mm) -0.6%
275/55R20 31.9" (810 mm) 0.1%
225/70R19.5 31.9" (811 mm) 0.2%
255/60R20 32" (814 mm) 0.6%
305/50R20 32" (814 mm) 0.6%
255/70R18 32.1" (815 mm) 0.7%
275/65R18 32.1" (815 mm) 0.7%
255/65R19 32.1" (815 mm) 0.7%
285/55R20 32.4" (822 mm) 1.6%
305/60R18 32.4" (823 mm) 1.7%
315/50R20 32.4" (824 mm) 1.9%
265/60R20 32.5" (826 mm) 2.1%
285/65R18 32.6" (827 mm) 2.2%
265/70R18 32.6" (829 mm) 2.5%
295/55R20 32.8" (832 mm) 2.8%
375/50R18 32.8" (833 mm) 3%