285/45R21 Tires

285/45R21 Conversion

When converted to inches, 285/45R21 is equivalent to 31.1x11.2R21.

285/45R21 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 5 inches (128 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 31.1 inches (789 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 97.7 inches (2477.5 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. 285/45R21 tire makes 649 revolutions per mile (404 revolutions per kilometer).

285/45R21 Section Width
11.2"
31.1"
285/45R21 Tire Side
Tire Circumference
97.7"
21"
5"
649 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 789 mm 31.1"
Tread Width 285 mm 11.2"
Rim Diameter 533.4 mm 21"
Sidewall Height 128 mm 5"
Circumference 2477.5 mm 97.7"
Revolutions 404 per km 649 per mile

285/45R21 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 285/45R21 tire can be replaced with 25 compatible tire sizes. Select optional plus size to see its specs.

Tire Size Overall Diameter Difference
295/40R21 30.3" (769 mm) -2.5%
265/40R22 30.4" (771 mm) -2.3%
265/45R21 30.4" (771 mm) -2.3%
305/35R22 30.4" (773 mm) -2%
315/35R22 30.7" (779 mm) -1.3%
275/40R22 30.7" (779 mm) -1.3%
325/30R23 30.7" (780 mm) -1.1%
275/45R21 30.7" (781 mm) -1%
285/35R23 30.9" (784 mm) -0.6%
315/40R21 30.9" (785 mm) -0.5%
325/35R22 31" (787 mm) -0.3%
285/40R22 31" (787 mm) -0.3%
255/50R21 31.1" (789 mm) 0%
255/45R22 31.1" (789 mm) 0%
295/35R23 31.1" (790 mm) 0.1%
325/40R21 31.2" (793 mm) 0.5%
295/40R22 31.3" (795 mm) 0.8%
265/45R22 31.4" (797 mm) 1%
305/35R23 31.4" (798 mm) 1.1%
305/40R22 31.6" (803 mm) 1.8%
275/40R23 31.7" (804 mm) 1.9%
275/45R22 31.8" (807 mm) 2.3%
275/50R21 31.9" (809 mm) 2.5%
325/35R23 32" (812 mm) 2.9%
285/40R23 32" (812 mm) 2.9%