225/45R18 Tires
225/45R18 Conversion
When converted to inches, 225/45R18 is equivalent to 25.9x8.9R18.
225/45R18 tire has a section width of 8.9 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 4 inches (101 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 25.9 inches (659 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 81.3 inches (2069.3 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. 225/45R18 tire makes 779 revolutions per mile (483 revolutions per kilometer).
| Metric | Inches | |
|---|---|---|
| Overall Diameter (Tire Height) | 659 mm | 25.9" |
| Tread Width | 225 mm | 8.9" |
| Rim Diameter | 457.2 mm | 18" |
| Sidewall Height | 101 mm | 4" |
| Circumference | 2069.3 mm | 81.3" |
| Revolutions | 483 per km | 779 per mile |
| Best Prices on 225/45R18 Tires | |
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 from $107.32 |
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 from $97.70 |
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 from $79.93 |
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 from $91.96 |
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225/45R18 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 225/45R18 tire can be replaced with 65 compatible tire sizes. Select optional plus size to see its specs.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 225/35R19 | 25.2" (641 mm) | -2.7% |
| 205/45R18 | 25.2" (641 mm) | -2.7% |
| 305/30R18 | 25.2" (641 mm) | -2.7% |
| 315/25R19 | 25.2" (641 mm) | -2.7% |
| 155/60R18 | 25.3" (643 mm) | -2.4% |
| 265/35R18 | 25.3" (643 mm) | -2.4% |
| 265/30R19 | 25.3" (643 mm) | -2.4% |
| 225/30R20 | 25.4" (644 mm) | -2.3% |
| 115/70R19 | 25.4" (645 mm) | -2.1% |
| 235/40R18 | 25.4" (645 mm) | -2.1% |
| 135/60R19 | 25.4" (645 mm) | -2.1% |
| 145/65R18 | 25.4" (645 mm) | -2.1% |
| 275/25R20 | 25.4" (646 mm) | -2% |
| 235/35R19 | 25.5" (647 mm) | -1.8% |
| 315/30R18 | 25.5" (647 mm) | -1.8% |
| 135/70R18 | 25.5" (647 mm) | -1.8% |
| 275/30R19 | 25.6" (649 mm) | -1.5% |
| 275/35R18 | 25.6" (649 mm) | -1.5% |
| 285/25R20 | 25.6" (650 mm) | -1.4% |
| 235/30R20 | 25.6" (650 mm) | -1.4% |
| 335/25R19 | 25.6" (651 mm) | -1.2% |
| 215/45R18 | 25.6" (651 mm) | -1.2% |
| 245/40R18 | 25.7" (653 mm) | -0.9% |
| 285/30R19 | 25.8" (655 mm) | -0.6% |
| 215/40R19 | 25.8" (655 mm) | -0.6% |
| 245/35R19 | 25.8" (655 mm) | -0.6% |
| 245/30R20 | 25.8" (656 mm) | -0.5% |
| 295/25R20 | 25.8" (656 mm) | -0.5% |
| 285/35R18 | 25.9" (657 mm) | -0.3% |
| 335/30R18 | 25.9" (659 mm) | 0% |
| 125/70R19 | 25.9" (659 mm) | 0% |
| 305/25R20 | 26" (660 mm) | 0.2% |
| 355/25R19 | 26" (661 mm) | 0.3% |
| 295/30R19 | 26" (661 mm) | 0.3% |
| 145/70R18 | 26" (661 mm) | 0.3% |
| 255/35R19 | 26" (661 mm) | 0.3% |
| 185/55R18 | 26" (661 mm) | 0.3% |
| 255/40R18 | 26" (661 mm) | 0.3% |
| 255/30R20 | 26.1" (662 mm) | 0.5% |
| 205/50R18 | 26.1" (663 mm) | 0.6% |
| 295/35R18 | 26.1" (663 mm) | 0.6% |
| 225/40R19 | 26.1" (663 mm) | 0.6% |
| 345/30R18 | 26.2" (665 mm) | 0.9% |
| 315/25R20 | 26.2" (666 mm) | 1.1% |
| 225/35R20 | 26.2" (666 mm) | 1.1% |
| 305/30R19 | 26.3" (667 mm) | 1.2% |
| 265/30R20 | 26.3" (668 mm) | 1.4% |
| 235/45R18 | 26.3" (669 mm) | 1.5% |
| 265/35R19 | 26.3" (669 mm) | 1.5% |
| 265/40R18 | 26.3" (669 mm) | 1.5% |
| 325/25R20 | 26.4" (670 mm) | 1.7% |
| 235/40R19 | 26.4" (671 mm) | 1.8% |
| 305/35R18 | 26.4" (671 mm) | 1.8% |
| 235/35R20 | 26.5" (672 mm) | 2% |
| 135/80R18 | 26.5" (673 mm) | 2.1% |
| 315/30R19 | 26.5" (673 mm) | 2.1% |
| 135/70R19 | 26.5" (673 mm) | 2.1% |
| 215/50R18 | 26.5" (673 mm) | 2.1% |
| 275/30R20 | 26.5" (674 mm) | 2.3% |
| 155/70R18 | 26.6" (675 mm) | 2.4% |
| 275/35R19 | 26.6" (675 mm) | 2.4% |
| 335/25R20 | 26.6" (676 mm) | 2.6% |
| 315/35R18 | 26.7" (677 mm) | 2.7% |
| 245/45R18 | 26.7" (677 mm) | 2.7% |
| 275/40R18 | 26.7" (677 mm) | 2.7% |