255/65R18 Tires

255/65R18 Conversion

When converted to inches, 255/65R18 is equivalent to 31.1x10R18.

255/65R18 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 18 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 6.5 inches (166 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 31.1 inches (789 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 97.7 inches (2477.5 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. 255/65R18 tire makes 649 revolutions per mile (404 revolutions per kilometer).

255/65R18 Section Width
10"
31.1"
255/65R18 Tire Side
Tire Circumference
97.7"
18"
6.5"
649 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 789 mm 31.1"
Tread Width 255 mm 10"
Rim Diameter 457.2 mm 18"
Sidewall Height 166 mm 6.5"
Circumference 2477.5 mm 97.7"
Revolutions 404 per km 649 per mile

255/65R18 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 255/65R18 tire can be replaced with 28 compatible tire sizes. Select optional plus size to see its specs.

Tire Size Overall Diameter Difference
235/55R20 30.2" (766 mm) -2.9%
285/55R18 30.4" (771 mm) -2.3%
175/90R18 30.4" (773 mm) -2%
295/45R20 30.5" (774 mm) -1.9%
265/50R20 30.5" (774 mm) -1.9%
265/55R19 30.5" (775 mm) -1.8%
265/60R18 30.5" (775 mm) -1.8%
245/65R18 30.5" (775 mm) -1.8%
165/90R19 30.7" (781 mm) -1%
305/45R20 30.8" (782 mm) -0.9%
275/50R20 30.9" (784 mm) -0.6%
275/55R19 30.9" (785 mm) -0.5%
275/60R18 31" (787 mm) -0.3%
235/70R18 31" (787 mm) -0.3%
255/55R20 31" (788 mm) -0.1%
255/60R19 31.1" (789 mm) 0%
235/65R19 31.1" (789 mm) 0%
285/50R20 31.3" (794 mm) 0.6%
225/75R18 31.3" (795 mm) 0.8%
285/55R19 31.4" (797 mm) 1%
285/60R18 31.5" (799 mm) 1.3%
265/65R18 31.5" (801 mm) 1.5%
245/70R18 31.5" (801 mm) 1.5%
245/60R20 31.6" (802 mm) 1.6%
295/50R20 31.7" (804 mm) 1.9%
235/75R18 31.9" (809 mm) 2.5%
275/55R20 31.9" (810 mm) 2.7%
225/70R19.5 31.9" (811 mm) 2.8%