305/60R18 Conversion

When converted to inches, 305/60R18 is equivalent to 32.4x12R18.

305/60R18 tire has a section width of 12 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 7.2 inches (183 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 32.4 inches (823 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 101.7 inches (2584.2 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. 305/60R18 tire makes 623 revolutions per mile (387 revolutions per kilometer).

305/60R18 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 305/60R18 tire can be replaced with 28 compatible tire sizes. Select optional plus size to see its specs.

Tire Size	Overall Diameter	Difference
285/60R18	31.5" (799 mm)	-2.9%
265/65R18	31.5" (801 mm)	-2.7%
245/70R18	31.5" (801 mm)	-2.7%
245/60R20	31.6" (802 mm)	-2.6%
295/50R20	31.7" (804 mm)	-2.3%
235/75R18	31.9" (809 mm)	-1.7%
275/55R20	31.9" (810 mm)	-1.6%
225/70R19.5	31.9" (811 mm)	-1.5%
305/50R20	32" (814 mm)	-1.1%
255/60R20	32" (814 mm)	-1.1%
255/65R19	32.1" (815 mm)	-1%
255/70R18	32.1" (815 mm)	-1%
275/65R18	32.1" (815 mm)	-1%
285/55R20	32.4" (822 mm)	-0.1%
315/50R20	32.4" (824 mm)	0.1%
265/60R20	32.5" (826 mm)	0.4%
285/65R18	32.6" (827 mm)	0.5%
265/70R18	32.6" (829 mm)	0.7%
295/55R20	32.8" (832 mm)	1.1%
375/50R18	32.8" (833 mm)	1.2%
325/50R20	32.8" (834 mm)	1.3%
275/60R20	33" (838 mm)	1.8%
245/70R19.5	33" (839 mm)	1.9%
295/65R18	33.1" (841 mm)	2.2%
275/70R18	33.2" (843 mm)	2.4%
305/55R20	33.2" (844 mm)	2.6%
375/45R20	33.3" (846 mm)	2.8%
325/60R18	33.3" (847 mm)	2.9%