305/40R20 Tire Size in Inches

305/40R20 is a metric tire size representation, which defines that the tires have a width of 305 mm, 40 is the aspect ratio and a rim diameter of 20 inches. In the imperial system the tire size 305/40R20 equates to a 29.6×12R20 that is commonly used in the automotive industry. So Converting 305/40R20 in inches the tires have a length of 29.6 inches, a width of 12 inches, a sidewall height of 4.8 inches and The number of complete resolutions made by the corresponding tire size is equal to 682 per mile with a circumference of 92.9 inches.

305/40R20 tire size in inches

305/40R20inchesmm
Tire Diameter29.6 inches752 mm
Tread Width12 inches305 mm
Rim Diameter20 inches508 mm
Sidewall Height4.8 inches122 mm
Circumference92.9 inches2361 mm
Revolutions682 per mile424 per km

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305/40R20 Equivalent Tire Sizes for replacement

If you are replacing your tires, always keep in mind that they are compatible with your vehicle so that the impact on the overall performance of your vehicle can be reduced. Here we have listed some tire size that is equivalent to 305/40R20 tires.

Tire Size Overall Diameter Difference
285/30R22 28.8″ (731 mm) -2.8%
245/35R22 28.8″ (731 mm) -2.8%
285/35R21 28.9″ (733 mm) -2.5%
325/35R20 29″ (736 mm) -2.1%
285/40R20 29″ (736 mm) -2.1%
295/30R22 29″ (737 mm) -2%
255/35R22 29″ (737 mm) -2%
255/40R21 29″ (737 mm) -2%
255/45R20 29.1″ (738 mm) -1.9%
295/35R21 29.1″ (739 mm) -1.7%
145/80R20 29.1″ (740 mm) -1.6%
305/30R22 29.3″ (743 mm) -1.2%
235/50R20 29.3″ (744 mm) -1.1%
295/40R20 29.3″ (744 mm) -1.1%
235/45R21 29.3″ (745 mm) -0.9%
265/35R22 29.3″ (745 mm) -0.9%
265/40R21 29.3″ (745 mm) -0.9%
265/45R20 29.4″ (746 mm) -0.8%
305/35R21 29.4″ (747 mm) -0.7%
315/30R22 29.5″ (749 mm) -0.4%
275/35R22 29.6″ (751 mm) -0.1%
245/45R21 29.6″ (753 mm) 0.1%
315/35R21 29.6″ (753 mm) 0.1%
275/40R21 29.6″ (753 mm) 0.1%
245/50R20 29.7″ (754 mm) 0.3%
275/45R20 29.8″ (756 mm) 0.5%
285/35R22 29.9″ (759 mm) 0.9%
285/40R21 30″ (761 mm) 1.2%
255/45R21 30″ (763 mm) 1.5%
255/40R22 30″ (763 mm) 1.5%
285/45R20 30.1″ (764 mm) 1.6%
255/50R20 30.1″ (764 mm) 1.6%
295/35R22 30.1″ (765 mm) 1.7%
235/55R20 30.2″ (766 mm) 1.9%
295/40R21 30.3″ (769 mm) 2.3%
265/45R21 30.4″ (771 mm) 2.5%
265/40R22 30.4″ (771 mm) 2.5%
305/35R22 30.4″ (773 mm) 2.8%
295/45R20 30.5″ (774 mm) 2.9%
265/50R20 30.5″ (774 mm) 2.9%

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