175/90R18 Tires
175/90R18 Conversion
When converted to inches, 175/90R18 is equivalent to 30.4x6.9R18.
175/90R18 tire has a section width of 6.9 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 6.2 inches (158 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 30.4 inches (773 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 95.5 inches (2427.2 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. 175/90R18 tire makes 663 revolutions per mile (412 revolutions per kilometer).
| Metric | Inches | |
|---|---|---|
| Overall Diameter (Tire Height) | 773 mm | 30.4" |
| Tread Width | 175 mm | 6.9" |
| Rim Diameter | 457.2 mm | 18" |
| Sidewall Height | 158 mm | 6.2" |
| Circumference | 2427.2 mm | 95.5" |
| Revolutions | 412 per km | 663 per mile |
| Best Prices on 175/90R18 Tires | |
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175/90R18 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 175/90R18 tire can be replaced with 34 compatible tire sizes. Select optional plus size to see its specs.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 245/60R18 | 29.6" (751 mm) | -2.8% |
| 305/40R20 | 29.6" (752 mm) | -2.7% |
| 245/55R19 | 29.6" (753 mm) | -2.6% |
| 245/50R20 | 29.7" (754 mm) | -2.5% |
| 165/90R18 | 29.7" (755 mm) | -2.3% |
| 275/45R20 | 29.8" (756 mm) | -2.2% |
| 275/50R19 | 29.9" (759 mm) | -1.8% |
| 275/55R18 | 29.9" (759 mm) | -1.8% |
| 255/60R18 | 30" (763 mm) | -1.3% |
| 255/55R19 | 30" (763 mm) | -1.3% |
| 175/80R19 | 30" (763 mm) | -1.3% |
| 235/65R18 | 30" (763 mm) | -1.3% |
| 255/50R20 | 30.1" (764 mm) | -1.2% |
| 285/45R20 | 30.1" (764 mm) | -1.2% |
| 235/60R19 | 30.1" (765 mm) | -1% |
| 235/55R20 | 30.2" (766 mm) | -0.9% |
| 285/55R18 | 30.4" (771 mm) | -0.3% |
| 265/50R20 | 30.5" (774 mm) | 0.1% |
| 295/45R20 | 30.5" (774 mm) | 0.1% |
| 245/65R18 | 30.5" (775 mm) | 0.3% |
| 265/55R19 | 30.5" (775 mm) | 0.3% |
| 265/60R18 | 30.5" (775 mm) | 0.3% |
| 165/90R19 | 30.7" (781 mm) | 1% |
| 305/45R20 | 30.8" (782 mm) | 1.2% |
| 275/50R20 | 30.9" (784 mm) | 1.4% |
| 275/55R19 | 30.9" (785 mm) | 1.6% |
| 275/60R18 | 31" (787 mm) | 1.8% |
| 235/70R18 | 31" (787 mm) | 1.8% |
| 255/55R20 | 31" (788 mm) | 1.9% |
| 235/65R19 | 31.1" (789 mm) | 2.1% |
| 255/65R18 | 31.1" (789 mm) | 2.1% |
| 255/60R19 | 31.1" (789 mm) | 2.1% |
| 285/50R20 | 31.3" (794 mm) | 2.7% |
| 225/75R18 | 31.3" (795 mm) | 2.8% |