185/45R15 Tires
185/45R15 Conversion
When converted to inches, 185/45R15 is equivalent to 21.5x7.3R15.
185/45R15 tire has a section width of 7.3 inches which is the measurement of tire's width from its inner sidewall to its outer sidewall. Rim diameter of 15 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 3.3 inches (83 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 21.5 inches (547 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 67.5 inches (1717.6 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. 185/45R15 tire makes 939 revolutions per mile (582 revolutions per kilometer).
| Metric | Inches | |
|---|---|---|
| Overall Diameter (Tire Height) | 547 mm | 21.5" |
| Tread Width | 185 mm | 7.3" |
| Rim Diameter | 381 mm | 15" |
| Sidewall Height | 83 mm | 3.3" |
| Circumference | 1717.6 mm | 67.5" |
| Revolutions | 582 per km | 939 per mile |
| Best Prices on 185/45R15 Tires | |
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185/45R15 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 185/45R15 tire can be replaced with 12 compatible tire sizes. Select optional plus size to see its specs.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 165/40R16 | 21.2" (538 mm) | -1.6% |
| 115/70R15 | 21.4" (543 mm) | -0.7% |
| 165/50R15 | 21.5" (547 mm) | 0% |
| 215/40R15 | 21.8" (553 mm) | 1.1% |
| 245/35R15 | 21.8" (553 mm) | 1.1% |
| 165/45R16 | 21.8" (554 mm) | 1.3% |
| 215/35R16 | 21.9" (556 mm) | 1.6% |
| 195/45R15 | 21.9" (557 mm) | 1.8% |
| 125/70R15 | 21.9" (557 mm) | 1.8% |
| 175/50R15 | 21.9" (557 mm) | 1.8% |
| 195/40R16 | 22.1" (562 mm) | 2.7% |
| 165/55R15 | 22.2" (563 mm) | 2.9% |