305/55R20 Tires

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 Section Width
12"
33.2"
305/55R20 Tire Side
Tire Circumference
104.2"
20"
6.6"
608 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 844 mm 33.2"
Tread Width 305 mm 12"
Rim Diameter 508 mm 20"
Sidewall Height 168 mm 6.6"
Circumference 2650.2 mm 104.2"
Revolutions 377 per km 608 per mile

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%