Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-19 | 215/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.97 (685.1) | 25.62 (650.7) | -1.35 (-34.4) -5% |
| Width inches (mm) | 8.86 (225) | 8.46 (215) | -0.39 (-10) -4.4% |
| Circum. inches (mm) | 84.74 (2152.31) | 80.48 (2044.23) | -4.25 (-108.07) -5% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 3.81 (96.75) | -0.18 (-4.5) -4.4% |
| Revolutions per mile (km) | 747.73 (464.62) | 787.26 (489.18) | 39.53 (24.56) 5.3% |
215/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19 mph (30.57 km/h) |
| 25 mph (40.23 km/h) | 23.74 mph (38.21 km/h) |
| 30 mph (48.28 km/h) | 28.49 mph (45.86 km/h) |
| 35 mph (56.33 km/h) | 33.24 mph (53.5 km/h) |
| 40 mph (64.37 km/h) | 37.99 mph (61.14 km/h) |
| 45 mph (72.42 km/h) | 42.74 mph (68.78 km/h) |
| 50 mph (80.47 km/h) | 47.49 mph (76.43 km/h) |
| 55 mph (88.51 km/h) | 52.24 mph (84.07 km/h) |
| 60 mph (96.56 km/h) | 56.99 mph (91.71 km/h) |
| 65 mph (104.61 km/h) | 61.74 mph (99.36 km/h) |
| 70 mph (112.65 km/h) | 66.49 mph (107 km/h) |
| 75 mph (120.7 km/h) | 71.23 mph (114.64 km/h) |
| 80 mph (128.75 km/h) | 75.98 mph (122.28 km/h) |
| 85 mph (136.79 km/h) | 80.73 mph (129.93 km/h) |
| 90 mph (144.84 km/h) | 85.48 mph (137.57 km/h) |
| 95 mph (152.89 km/h) | 90.23 mph (145.21 km/h) |
| 100 mph (160.93 km/h) | 94.98 mph (152.85 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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