Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-18 | 215/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 25.62 (650.7) | 0.53 (13.5) 2.1% |
| Width inches (mm) | 8.86 (225) | 8.46 (215) | -0.39 (-10) -4.4% |
| Circum. inches (mm) | 78.81 (2001.82) | 80.48 (2044.23) | 1.67 (42.41) 2.1% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.81 (96.75) | 0.27 (6.75) 7.5% |
| Revolutions per mile (km) | 803.94 (499.54) | 787.26 (489.18) | -16.68 (-10.36) -2.1% |
215/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.42 mph (32.87 km/h) |
| 25 mph (40.23 km/h) | 25.53 mph (41.09 km/h) |
| 30 mph (48.28 km/h) | 30.64 mph (49.3 km/h) |
| 35 mph (56.33 km/h) | 35.74 mph (57.52 km/h) |
| 40 mph (64.37 km/h) | 40.85 mph (65.74 km/h) |
| 45 mph (72.42 km/h) | 45.95 mph (73.95 km/h) |
| 50 mph (80.47 km/h) | 51.06 mph (82.17 km/h) |
| 55 mph (88.51 km/h) | 56.17 mph (90.39 km/h) |
| 60 mph (96.56 km/h) | 61.27 mph (98.61 km/h) |
| 65 mph (104.61 km/h) | 66.38 mph (106.82 km/h) |
| 70 mph (112.65 km/h) | 71.48 mph (115.04 km/h) |
| 75 mph (120.7 km/h) | 76.59 mph (123.26 km/h) |
| 80 mph (128.75 km/h) | 81.69 mph (131.48 km/h) |
| 85 mph (136.79 km/h) | 86.8 mph (139.69 km/h) |
| 90 mph (144.84 km/h) | 91.91 mph (147.91 km/h) |
| 95 mph (152.89 km/h) | 97.01 mph (156.13 km/h) |
| 100 mph (160.93 km/h) | 102.12 mph (164.34 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2003 | 2327 | 2506 | 2617 | 2737 | 2822 | 2916 | 3026 | 3180 | 3333 | 3504 | 3640 | 3887 | 4160 | 4373 | 4510 | 4587 | 4868 | 5260 | 6113 |
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