Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-18 | 215/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.77 (629.2) | 25.62 (650.7) | 0.85 (21.5) 3.4% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 77.82 (1976.69) | 80.48 (2044.23) | 2.66 (67.54) 3.4% |
| Sidewall Height inches (mm) | 3.39 (86) | 3.81 (96.75) | 0.42 (10.75) 12.5% |
| Revolutions per mile (km) | 814.16 (505.9) | 787.26 (489.18) | -26.9 (-16.72) -3.3% |
215/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.68 mph (33.29 km/h) |
| 25 mph (40.23 km/h) | 25.85 mph (41.61 km/h) |
| 30 mph (48.28 km/h) | 31.03 mph (49.93 km/h) |
| 35 mph (56.33 km/h) | 36.2 mph (58.25 km/h) |
| 40 mph (64.37 km/h) | 41.37 mph (66.57 km/h) |
| 45 mph (72.42 km/h) | 46.54 mph (74.9 km/h) |
| 50 mph (80.47 km/h) | 51.71 mph (83.22 km/h) |
| 55 mph (88.51 km/h) | 56.88 mph (91.54 km/h) |
| 60 mph (96.56 km/h) | 62.05 mph (99.86 km/h) |
| 65 mph (104.61 km/h) | 67.22 mph (108.18 km/h) |
| 70 mph (112.65 km/h) | 72.39 mph (116.5 km/h) |
| 75 mph (120.7 km/h) | 77.56 mph (124.83 km/h) |
| 80 mph (128.75 km/h) | 82.73 mph (133.15 km/h) |
| 85 mph (136.79 km/h) | 87.9 mph (141.47 km/h) |
| 90 mph (144.84 km/h) | 93.08 mph (149.79 km/h) |
| 95 mph (152.89 km/h) | 98.25 mph (158.11 km/h) |
| 100 mph (160.93 km/h) | 103.42 mph (166.43 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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