255/30R18 Conversion

When converted to inches, 255/30R18 is equivalent to 24.1x10R18.

255/30R18 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 3 inches (77 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 24.1 inches (611 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 75.7 inches (1918.5 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. 255/30R18 tire makes 837 revolutions per mile (521 revolutions per kilometer).

255/30R18 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 255/30R18 tire can be replaced with 18 compatible tire sizes. Select optional plus size to see its specs.

Tire Size	Overall Diameter	Difference
225/30R18	23.3" (593 mm)	-2.9%
195/35R18	23.3" (593 mm)	-2.9%
235/30R18	23.6" (599 mm)	-2%
205/35R18	23.7" (601 mm)	-1.6%
245/30R18	23.8" (605 mm)	-1%
215/35R18	23.9" (607 mm)	-0.7%
125/60R18	23.9" (607 mm)	-0.7%
175/45R18	24.2" (615 mm)	0.7%
225/35R18	24.2" (615 mm)	0.7%
265/30R18	24.3" (617 mm)	1%
225/30R19	24.4" (619 mm)	1.3%
135/60R18	24.4" (619 mm)	1.3%
235/35R18	24.4" (621 mm)	1.6%
205/40R18	24.4" (621 mm)	1.6%
235/30R19	24.6" (625 mm)	2.3%
215/40R18	24.8" (629 mm)	2.9%
245/35R18	24.8" (629 mm)	2.9%
285/30R18	24.8" (629 mm)	2.9%