205/45R18 Tires
205/45R18 Conversion
When converted to inches, 205/45R18 is equivalent to 25.2x8.1R18.
205/45R18 tire has a section width of 8.1 inches which is the measurement of tire's width from its inner sidewall to its outer sidewall. Rim diameter of 18 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 3.6 inches (92 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 25.2 inches (641 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 79.1 inches (2012.7 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. 205/45R18 tire makes 801 revolutions per mile (497 revolutions per kilometer).
| Metric | Inches | |
|---|---|---|
| Overall Diameter (Tire Height) | 641 mm | 25.2" |
| Tread Width | 205 mm | 8.1" |
| Rim Diameter | 457.2 mm | 18" |
| Sidewall Height | 92 mm | 3.6" |
| Circumference | 2012.7 mm | 79.1" |
| Revolutions | 497 per km | 801 per mile |
| Best Prices on 205/45R18 Tires | |
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 from $82.93 |
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 from $91.96 |
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205/45R18 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 205/45R18 tire can be replaced with 46 compatible tire sizes. Select optional plus size to see its specs.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 235/30R19 | 24.6" (625 mm) | -2.5% |
| 215/40R18 | 24.8" (629 mm) | -1.9% |
| 245/35R18 | 24.8" (629 mm) | -1.9% |
| 285/30R18 | 24.8" (629 mm) | -1.9% |
| 295/25R19 | 24.8" (631 mm) | -1.6% |
| 245/30R19 | 24.8" (631 mm) | -1.6% |
| 215/35R19 | 24.9" (633 mm) | -1.2% |
| 125/70R18 | 24.9" (633 mm) | -1.2% |
| 295/30R18 | 25" (635 mm) | -0.9% |
| 305/25R19 | 25" (635 mm) | -0.9% |
| 255/35R18 | 25" (635 mm) | -0.9% |
| 225/40R18 | 25.1" (637 mm) | -0.6% |
| 255/30R19 | 25.1" (637 mm) | -0.6% |
| 215/30R20 | 25.1" (638 mm) | -0.5% |
| 225/35R19 | 25.2" (641 mm) | 0% |
| 305/30R18 | 25.2" (641 mm) | 0% |
| 315/25R19 | 25.2" (641 mm) | 0% |
| 155/60R18 | 25.3" (643 mm) | 0.3% |
| 265/35R18 | 25.3" (643 mm) | 0.3% |
| 265/30R19 | 25.3" (643 mm) | 0.3% |
| 225/30R20 | 25.4" (644 mm) | 0.5% |
| 135/60R19 | 25.4" (645 mm) | 0.6% |
| 145/65R18 | 25.4" (645 mm) | 0.6% |
| 235/40R18 | 25.4" (645 mm) | 0.6% |
| 115/70R19 | 25.4" (645 mm) | 0.6% |
| 275/25R20 | 25.4" (646 mm) | 0.8% |
| 315/30R18 | 25.5" (647 mm) | 0.9% |
| 235/35R19 | 25.5" (647 mm) | 0.9% |
| 135/70R18 | 25.5" (647 mm) | 0.9% |
| 275/30R19 | 25.6" (649 mm) | 1.2% |
| 275/35R18 | 25.6" (649 mm) | 1.2% |
| 235/30R20 | 25.6" (650 mm) | 1.4% |
| 285/25R20 | 25.6" (650 mm) | 1.4% |
| 335/25R19 | 25.6" (651 mm) | 1.6% |
| 215/45R18 | 25.6" (651 mm) | 1.6% |
| 245/40R18 | 25.7" (653 mm) | 1.9% |
| 215/40R19 | 25.8" (655 mm) | 2.2% |
| 245/35R19 | 25.8" (655 mm) | 2.2% |
| 285/30R19 | 25.8" (655 mm) | 2.2% |
| 295/25R20 | 25.8" (656 mm) | 2.3% |
| 245/30R20 | 25.8" (656 mm) | 2.3% |
| 285/35R18 | 25.9" (657 mm) | 2.5% |
| 335/30R18 | 25.9" (659 mm) | 2.8% |
| 125/70R19 | 25.9" (659 mm) | 2.8% |
| 225/45R18 | 25.9" (659 mm) | 2.8% |
| 305/25R20 | 26" (660 mm) | 3% |