275/45R21 Tires
275/45R21 Conversion
When converted to inches, 275/45R21 is equivalent to 30.7x10.8R21.
275/45R21 tire has a section width of 10.8 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 4.9 inches (124 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 30.7 inches (781 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 96.4 inches (2452.3 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. 275/45R21 tire makes 657 revolutions per mile (408 revolutions per kilometer).
| Metric | Inches | |
|---|---|---|
| Overall Diameter (Tire Height) | 781 mm | 30.7" |
| Tread Width | 275 mm | 10.8" |
| Rim Diameter | 533.4 mm | 21" |
| Sidewall Height | 124 mm | 4.9" |
| Circumference | 2452.3 mm | 96.4" |
| Revolutions | 408 per km | 657 per mile |
| Best Prices on 275/45R21 Tires | |
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 from $333.09 |
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 from $364.27 |
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 from $209.99 |
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 from $198.98 |
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275/45R21 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 275/45R21 tire can be replaced with 27 compatible tire sizes. Select optional plus size to see its specs.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 285/35R22 | 29.9" (759 mm) | -2.8% |
| 285/40R21 | 30" (761 mm) | -2.6% |
| 295/30R23 | 30" (762 mm) | -2.4% |
| 255/40R22 | 30" (763 mm) | -2.3% |
| 255/45R21 | 30" (763 mm) | -2.3% |
| 295/35R22 | 30.1" (765 mm) | -2% |
| 295/40R21 | 30.3" (769 mm) | -1.5% |
| 265/45R21 | 30.4" (771 mm) | -1.3% |
| 265/40R22 | 30.4" (771 mm) | -1.3% |
| 305/35R22 | 30.4" (773 mm) | -1% |
| 275/40R22 | 30.7" (779 mm) | -0.3% |
| 315/35R22 | 30.7" (779 mm) | -0.3% |
| 325/30R23 | 30.7" (780 mm) | -0.1% |
| 285/35R23 | 30.9" (784 mm) | 0.4% |
| 315/40R21 | 30.9" (785 mm) | 0.5% |
| 325/35R22 | 31" (787 mm) | 0.8% |
| 285/40R22 | 31" (787 mm) | 0.8% |
| 255/45R22 | 31.1" (789 mm) | 1% |
| 285/45R21 | 31.1" (789 mm) | 1% |
| 255/50R21 | 31.1" (789 mm) | 1% |
| 295/35R23 | 31.1" (790 mm) | 1.2% |
| 325/40R21 | 31.2" (793 mm) | 1.5% |
| 295/40R22 | 31.3" (795 mm) | 1.8% |
| 265/45R22 | 31.4" (797 mm) | 2% |
| 305/35R23 | 31.4" (798 mm) | 2.2% |
| 305/40R22 | 31.6" (803 mm) | 2.8% |
| 275/40R23 | 31.7" (804 mm) | 2.9% |