305/30R21 Tire Size in Inches

305/30R21 is a metric tire size representation, which defines that the tires have a width of 305 mm, 30 is the aspect ratio and a rim diameter of 21 inches. In the imperial system the tire size 305/30R21 equates to a 28.2×12R21 that is commonly used in the automotive industry. So Converting 305/30R21 in inches the tires have a length of 28.2 inches, a width of 12 inches, a sidewall height of 3.6 inches and The number of complete resolutions made by the corresponding tire size is equal to 716 per mile with a circumference of 88.5 inches.

305/30R21 tire size in inches

305/30R21inchesmm
Tire Diameter28.2 inches717 mm
Tread Width12 inches305 mm
Rim Diameter21 inches533 mm
Sidewall Height3.6 inches92 mm
Circumference88.5 inches2251 mm
Revolutions716 per mile444 per km

Tire Size Calculator

Tire Diameter
Tread Width
Rim Diameter
Sidewall Height
Circumference
Revolutions

305/30R21 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 305/30R21 tires.

Tire Size Overall Diameter Difference
275/25R22 27.4″ (697 mm) -2.8%
235/35R21 27.4″ (697 mm) -2.8%
275/30R21 27.5″ (699 mm) -2.5%
285/25R22 27.6″ (701 mm) -2.2%
235/30R22 27.6″ (701 mm) -2.2%
285/30R21 27.8″ (705 mm) -1.7%
245/35R21 27.8″ (705 mm) -1.7%
245/30R22 27.8″ (707 mm) -1.4%
295/25R22 27.8″ (707 mm) -1.4%
295/30R21 28″ (711 mm) -0.8%
305/25R22 28″ (711 mm) -0.8%
355/25R21 28″ (711 mm) -0.8%
255/35R21 28″ (711 mm) -0.8%
255/30R22 28.1″ (713 mm) -0.6%
265/25R23 28.2″ (716 mm) -0.1%
315/25R22 28.2″ (717 mm) 0%
265/35R21 28.3″ (719 mm) 0.3%
265/30R22 28.3″ (719 mm) 0.3%
315/30R21 28.5″ (723 mm) 0.8%
275/30R22 28.5″ (725 mm) 1.1%
275/35R21 28.5″ (725 mm) 1.1%
335/25R22 28.6″ (727 mm) 1.4%
325/30R21 28.7″ (729 mm) 1.7%
245/40R21 28.7″ (729 mm) 1.7%
245/35R22 28.8″ (731 mm) 2%
285/30R22 28.8″ (731 mm) 2%
285/35R21 28.9″ (733 mm) 2.2%
305/25R23 29″ (736 mm) 2.6%
295/30R22 29″ (737 mm) 2.8%
255/40R21 29″ (737 mm) 2.8%
255/35R22 29″ (737 mm) 2.8%

Leave a Comment