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).
| 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 |
| Best Prices on 285/45R21 Tires | |
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 from $363.31 |
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 from $179.99 |
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 from $181.96 |
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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% |