315/40R18 Tires
315/40R18 Conversion
When converted to inches, 315/40R18 is equivalent to 27.9x12.4R18.
315/40R18 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 18 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 5 inches (126 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 27.9 inches (709 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 87.6 inches (2226.3 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. 315/40R18 tire makes 723 revolutions per mile (449 revolutions per kilometer).
| Metric | Inches | |
|---|---|---|
| Overall Diameter (Tire Height) | 709 mm | 27.9" |
| Tread Width | 315 mm | 12.4" |
| Rim Diameter | 457.2 mm | 18" |
| Sidewall Height | 126 mm | 5" |
| Circumference | 2226.3 mm | 87.6" |
| Revolutions | 449 per km | 723 per mile |
| Best Prices on 315/40R18 Tires | |
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315/40R18 Replacement Tire Sizes
Replacement tires have to be within 3% of the original tire's overall diameter. 315/40R18 tire can be replaced with 68 compatible tire sizes. Select optional plus size to see its specs.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 225/40R20 | 27.1" (688 mm) | -3% |
| 145/80R18 | 27.1" (689 mm) | -2.8% |
| 165/70R18 | 27.1" (689 mm) | -2.8% |
| 295/35R19 | 27.1" (689 mm) | -2.8% |
| 345/30R19 | 27.2" (691 mm) | -2.5% |
| 305/30R20 | 27.2" (692 mm) | -2.4% |
| 215/55R18 | 27.3" (693 mm) | -2.3% |
| 235/50R18 | 27.3" (693 mm) | -2.3% |
| 295/40R18 | 27.3" (693 mm) | -2.3% |
| 175/60R19 | 27.3" (693 mm) | -2.3% |
| 155/60R20 | 27.3" (694 mm) | -2.1% |
| 265/35R20 | 27.3" (694 mm) | -2.1% |
| 235/45R19 | 27.4" (695 mm) | -2% |
| 265/40R19 | 27.4" (695 mm) | -2% |
| 265/45R18 | 27.4" (695 mm) | -2% |
| 145/65R20 | 27.4" (696 mm) | -1.8% |
| 235/40R20 | 27.4" (696 mm) | -1.8% |
| 355/30R19 | 27.4" (697 mm) | -1.7% |
| 305/35R19 | 27.4" (697 mm) | -1.7% |
| 315/30R20 | 27.5" (698 mm) | -1.6% |
| 345/35R18 | 27.5" (699 mm) | -1.4% |
| 175/55R20 | 27.6" (700 mm) | -1.3% |
| 275/35R20 | 27.6" (700 mm) | -1.3% |
| 305/40R18 | 27.6" (701 mm) | -1.1% |
| 155/70R19 | 27.6" (701 mm) | -1.1% |
| 215/45R20 | 27.6" (702 mm) | -1% |
| 275/40R19 | 27.7" (703 mm) | -0.8% |
| 145/85R18 | 27.7" (703 mm) | -0.8% |
| 205/60R18 | 27.7" (703 mm) | -0.8% |
| 245/50R18 | 27.7" (703 mm) | -0.8% |
| 245/45R19 | 27.7" (703 mm) | -0.8% |
| 315/35R19 | 27.7" (703 mm) | -0.8% |
| 325/30R20 | 27.7" (704 mm) | -0.7% |
| 195/50R20 | 27.7" (704 mm) | -0.7% |
| 245/40R20 | 27.7" (704 mm) | -0.7% |
| 225/55R18 | 27.8" (705 mm) | -0.6% |
| 155/80R18 | 27.8" (705 mm) | -0.6% |
| 275/45R18 | 27.8" (705 mm) | -0.6% |
| 165/60R20 | 27.8" (706 mm) | -0.4% |
| 285/35R20 | 27.9" (708 mm) | -0.1% |
| 225/45R20 | 28" (710 mm) | 0.1% |
| 155/65R20 | 28" (710 mm) | 0.1% |
| 335/30R20 | 28" (710 mm) | 0.1% |
| 285/40R19 | 28" (711 mm) | 0.3% |
| 255/40R20 | 28" (712 mm) | 0.4% |
| 255/45R19 | 28.1" (713 mm) | 0.6% |
| 285/45R18 | 28.1" (713 mm) | 0.6% |
| 255/50R18 | 28.1" (713 mm) | 0.6% |
| 295/35R20 | 28.1" (714 mm) | 0.7% |
| 145/80R19 | 28.1" (715 mm) | 0.8% |
| 235/55R18 | 28.1" (715 mm) | 0.8% |
| 345/30R20 | 28.2" (716 mm) | 1% |
| 235/50R19 | 28.3" (719 mm) | 1.4% |
| 295/40R19 | 28.3" (719 mm) | 1.4% |
| 235/45R20 | 28.3" (720 mm) | 1.6% |
| 265/40R20 | 28.3" (720 mm) | 1.6% |
| 155/85R18 | 28.4" (721 mm) | 1.7% |
| 265/45R19 | 28.4" (721 mm) | 1.7% |
| 305/35R20 | 28.4" (722 mm) | 1.8% |
| 295/45R18 | 28.5" (723 mm) | 2% |
| 265/50R18 | 28.5" (723 mm) | 2% |
| 345/35R19 | 28.5" (725 mm) | 2.3% |
| 225/60R18 | 28.6" (727 mm) | 2.5% |
| 245/55R18 | 28.6" (727 mm) | 2.5% |
| 315/35R20 | 28.7" (728 mm) | 2.7% |
| 275/40R20 | 28.7" (728 mm) | 2.7% |
| 245/45R20 | 28.7" (728 mm) | 2.7% |
| 245/50R19 | 28.7" (729 mm) | 2.8% |