285/30R21 Tire Size in Inches

285/30R21 is a metric tire size representation, which defines that the tires have a width of 285 mm, 30 is the aspect ratio and a rim diameter of 21 inches. In the imperial system the tire size 285/30R21 equates to a 27.8×11.2R21 that is commonly used in the automotive industry. So Converting 285/30R21 in inches the tires have a length of 27.8 inches, a width of 11.2 inches, a sidewall height of 3.4 inches and The number of complete resolutions made by the corresponding tire size is equal to 726 per mile with a circumference of 87.3 inches.

285/30R21 tire size in inches

285/30R21inchesmm
Tire Diameter27.8 inches705 mm
Tread Width11.2 inches285 mm
Rim Diameter21 inches533 mm
Sidewall Height3.4 inches86 mm
Circumference87.3 inches2214 mm
Revolutions726 per mile452 per km

Tire Size Calculator

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285/30R21 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 285/30R21 tires.

Tire Size Overall Diameter Difference
305/25R21 27″ (685 mm) -2.8%
255/30R21 27″ (687 mm) -2.6%
265/25R22 27.2″ (691 mm) -2%
265/30R21 27.3″ (693 mm) -1.7%
225/30R22 27.4″ (695 mm) -1.4%
325/25R21 27.4″ (695 mm) -1.4%
275/25R22 27.4″ (697 mm) -1.1%
235/35R21 27.4″ (697 mm) -1.1%
275/30R21 27.5″ (699 mm) -0.9%
285/25R22 27.6″ (701 mm) -0.6%
235/30R22 27.6″ (701 mm) -0.6%
245/35R21 27.8″ (705 mm) 0%
295/25R22 27.8″ (707 mm) 0.3%
245/30R22 27.8″ (707 mm) 0.3%
295/30R21 28″ (711 mm) 0.9%
305/25R22 28″ (711 mm) 0.9%
255/35R21 28″ (711 mm) 0.9%
355/25R21 28″ (711 mm) 0.9%
255/30R22 28.1″ (713 mm) 1.1%
265/25R23 28.2″ (716 mm) 1.6%
315/25R22 28.2″ (717 mm) 1.7%
305/30R21 28.2″ (717 mm) 1.7%
265/30R22 28.3″ (719 mm) 2%
265/35R21 28.3″ (719 mm) 2%
315/30R21 28.5″ (723 mm) 2.6%
275/30R22 28.5″ (725 mm) 2.8%
275/35R21 28.5″ (725 mm) 2.8%

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