305/55R20 Conversion

When converted to inches, 305/55R20 is equivalent to 33.2x12R20.

305/55R20 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 20 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 6.6 inches (168 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 33.2 inches (844 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 104.2 inches (2650.2 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. 305/55R20 tire makes 608 revolutions per mile (377 revolutions per kilometer).

305/55R20 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 305/55R20 tire can be replaced with 23 compatible tire sizes. Select optional plus size to see its specs.

Tire Size	Overall Diameter	Difference
325/40R22	32.2" (819 mm)	-3%
285/55R20	32.4" (822 mm)	-2.6%
315/50R20	32.4" (824 mm)	-2.4%
265/50R22	32.5" (825 mm)	-2.3%
295/45R22	32.5" (825 mm)	-2.3%
265/60R20	32.5" (826 mm)	-2.1%
295/55R20	32.8" (832 mm)	-1.4%
305/45R22	32.8" (833 mm)	-1.3%
325/50R20	32.8" (834 mm)	-1.2%
275/50R22	32.9" (835 mm)	-1.1%
275/60R20	33" (838 mm)	-0.7%
315/45R22	33.2" (843 mm)	-0.1%
355/40R22	33.2" (843 mm)	-0.1%
285/50R22	33.3" (845 mm)	0.1%
375/45R20	33.3" (846 mm)	0.2%
285/60R20	33.5" (850 mm)	0.7%
325/45R22	33.5" (851 mm)	0.8%
295/50R22	33.7" (855 mm)	1.3%
275/55R22	33.9" (861 mm)	2%
295/60R20	33.9" (862 mm)	2.1%
355/50R20	34" (864 mm)	2.4%
305/50R22	34.1" (865 mm)	2.5%
275/65R20	34.1" (866 mm)	2.6%