285/30R21 Tires

285/30R21 Conversion

When converted to inches, 285/30R21 is equivalent to 27.8x11.2R21.

285/30R21 tire has a section width of 11.2 inches which is the measurement of tire's width from its inner sidewall to its outer sidewall. Rim diameter of 21 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 3.4 inches (86 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 27.8 inches (705 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 87.3 inches (2213.7 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. 285/30R21 tire makes 726 revolutions per mile (452 revolutions per kilometer).

285/30R21 Section Width
11.2"
27.8"
285/30R21 Tire Side
Tire Circumference
87.3"
21"
3.4"
726 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 705 mm 27.8"
Tread Width 285 mm 11.2"
Rim Diameter 533.4 mm 21"
Sidewall Height 86 mm 3.4"
Circumference 2213.7 mm 87.3"
Revolutions 452 per km 726 per mile

285/30R21 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 285/30R21 tire can be replaced with 27 compatible tire sizes. Select optional plus size to see its specs.

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%