315/30R21 Tires
315/30R21 Conversion
When converted to inches, 315/30R21 is equivalent to 28.5x12.4R21.
315/30R21 tire has a section width of 12.4 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 3.7 inches (95 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 28.5 inches (723 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 89.5 inches (2270.2 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. 315/30R21 tire makes 708 revolutions per mile (440 revolutions per kilometer).
| Metric | Inches | |
|---|---|---|
| Overall Diameter (Tire Height) | 723 mm | 28.5" |
| Tread Width | 315 mm | 12.4" |
| Rim Diameter | 533.4 mm | 21" |
| Sidewall Height | 95 mm | 3.7" |
| Circumference | 2270.2 mm | 89.5" |
| Revolutions | 440 per km | 708 per mile |
| Best Prices on 315/30R21 Tires | |
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 from $464.44 |
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 from $528.99 |
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 from $524.28 |
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315/30R21 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 315/30R21 tire can be replaced with 29 compatible tire sizes. Select optional plus size to see its specs.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 245/35R21 | 27.8" (705 mm) | -2.5% |
| 285/30R21 | 27.8" (705 mm) | -2.5% |
| 245/30R22 | 27.8" (707 mm) | -2.2% |
| 295/25R22 | 27.8" (707 mm) | -2.2% |
| 305/25R22 | 28" (711 mm) | -1.7% |
| 295/30R21 | 28" (711 mm) | -1.7% |
| 355/25R21 | 28" (711 mm) | -1.7% |
| 255/35R21 | 28" (711 mm) | -1.7% |
| 255/30R22 | 28.1" (713 mm) | -1.4% |
| 265/25R23 | 28.2" (716 mm) | -1% |
| 305/30R21 | 28.2" (717 mm) | -0.8% |
| 315/25R22 | 28.2" (717 mm) | -0.8% |
| 265/35R21 | 28.3" (719 mm) | -0.6% |
| 265/30R22 | 28.3" (719 mm) | -0.6% |
| 275/35R21 | 28.5" (725 mm) | 0.3% |
| 275/30R22 | 28.5" (725 mm) | 0.3% |
| 335/25R22 | 28.6" (727 mm) | 0.6% |
| 245/40R21 | 28.7" (729 mm) | 0.8% |
| 325/30R21 | 28.7" (729 mm) | 0.8% |
| 245/35R22 | 28.8" (731 mm) | 1.1% |
| 285/30R22 | 28.8" (731 mm) | 1.1% |
| 285/35R21 | 28.9" (733 mm) | 1.4% |
| 305/25R23 | 29" (736 mm) | 1.8% |
| 295/30R22 | 29" (737 mm) | 1.9% |
| 255/35R22 | 29" (737 mm) | 1.9% |
| 255/40R21 | 29" (737 mm) | 1.9% |
| 295/35R21 | 29.1" (739 mm) | 2.2% |
| 315/25R23 | 29.2" (742 mm) | 2.6% |
| 305/30R22 | 29.3" (743 mm) | 2.8% |