Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/55-18 | 215/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.31 (693.7) | 25.62 (650.7) | -1.69 (-43) -6.2% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 85.8 (2179.32) | 80.48 (2044.23) | -5.32 (-135.09) -6.2% |
| Sidewall Height inches (mm) | 4.66 (118.25) | 3.81 (96.75) | -0.85 (-21.5) -18.2% |
| Revolutions per mile (km) | 738.46 (458.86) | 787.26 (489.18) | 48.8 (30.32) 6.6% |
215/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.76 mph (30.19 km/h) |
| 25 mph (40.23 km/h) | 23.45 mph (37.74 km/h) |
| 30 mph (48.28 km/h) | 28.14 mph (45.29 km/h) |
| 35 mph (56.33 km/h) | 32.83 mph (52.84 km/h) |
| 40 mph (64.37 km/h) | 37.52 mph (60.38 km/h) |
| 45 mph (72.42 km/h) | 42.21 mph (67.93 km/h) |
| 50 mph (80.47 km/h) | 46.9 mph (75.48 km/h) |
| 55 mph (88.51 km/h) | 51.59 mph (83.03 km/h) |
| 60 mph (96.56 km/h) | 56.28 mph (90.58 km/h) |
| 65 mph (104.61 km/h) | 60.97 mph (98.12 km/h) |
| 70 mph (112.65 km/h) | 65.66 mph (105.67 km/h) |
| 75 mph (120.7 km/h) | 70.35 mph (113.22 km/h) |
| 80 mph (128.75 km/h) | 75.04 mph (120.77 km/h) |
| 85 mph (136.79 km/h) | 79.73 mph (128.32 km/h) |
| 90 mph (144.84 km/h) | 84.42 mph (135.86 km/h) |
| 95 mph (152.89 km/h) | 89.11 mph (143.41 km/h) |
| 100 mph (160.93 km/h) | 93.8 mph (150.96 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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