235/30R18 Tires

235/30R18 Conversion

When converted to inches, 235/30R18 is equivalent to 23.6x9.3R18.

235/30R18 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 2.8 inches (71 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 23.6 inches (599 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 74.1 inches (1880.9 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. 235/30R18 tire makes 855 revolutions per mile (532 revolutions per kilometer).

235/30R18 Section Width
9.3"
23.6"
235/30R18 Tire Side
Tire Circumference
74.1"
18"
2.8"
855 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 599 mm 23.6"
Tread Width 235 mm 9.3"
Rim Diameter 457.2 mm 18"
Sidewall Height 71 mm 2.8"
Circumference 1880.9 mm 74.1"
Revolutions 532 per km 855 per mile

235/30R18 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 235/30R18 tire can be replaced with 10 compatible tire sizes. Select optional plus size to see its specs.

Tire Size Overall Diameter Difference
165/40R18 23.2" (589 mm) -1.7%
195/35R18 23.3" (593 mm) -1%
225/30R18 23.3" (593 mm) -1%
205/35R18 23.7" (601 mm) 0.3%
245/30R18 23.8" (605 mm) 1%
125/60R18 23.9" (607 mm) 1.3%
215/35R18 23.9" (607 mm) 1.3%
255/30R18 24.1" (611 mm) 2%
225/35R18 24.2" (615 mm) 2.7%
175/45R18 24.2" (615 mm) 2.7%