Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/45-17 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.62 (625.3) | 25.97 (659.7) | 1.35 (34.4) 5.5% |
| Width inches (mm) | 8.46 (215) | 8.86 (225) | 0.39 (10) 4.7% |
| Circum. inches (mm) | 77.34 (1964.44) | 81.59 (2072.51) | 4.25 (108.07) 5.5% |
| Sidewall Height inches (mm) | 3.81 (96.75) | 3.99 (101.25) | 0.18 (4.5) 4.7% |
| Revolutions per mile (km) | 819.24 (509.05) | 776.52 (482.51) | -42.72 (-26.54) -5.2% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.1 mph (33.96 km/h) |
| 25 mph (40.23 km/h) | 26.38 mph (42.45 km/h) |
| 30 mph (48.28 km/h) | 31.65 mph (50.94 km/h) |
| 35 mph (56.33 km/h) | 36.93 mph (59.43 km/h) |
| 40 mph (64.37 km/h) | 42.2 mph (67.92 km/h) |
| 45 mph (72.42 km/h) | 47.48 mph (76.4 km/h) |
| 50 mph (80.47 km/h) | 52.75 mph (84.89 km/h) |
| 55 mph (88.51 km/h) | 58.03 mph (93.38 km/h) |
| 60 mph (96.56 km/h) | 63.3 mph (101.87 km/h) |
| 65 mph (104.61 km/h) | 68.58 mph (110.36 km/h) |
| 70 mph (112.65 km/h) | 73.85 mph (118.85 km/h) |
| 75 mph (120.7 km/h) | 79.13 mph (127.34 km/h) |
| 80 mph (128.75 km/h) | 84.4 mph (135.83 km/h) |
| 85 mph (136.79 km/h) | 89.68 mph (144.32 km/h) |
| 90 mph (144.84 km/h) | 94.95 mph (152.81 km/h) |
| 95 mph (152.89 km/h) | 100.23 mph (161.3 km/h) |
| 100 mph (160.93 km/h) | 105.5 mph (169.79 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1976 | 2296 | 2472 | 2582 | 2699 | 2783 | 2876 | 2985 | 3137 | 3288 | 3456 | 3591 | 3834 | 4104 | 4314 | 4448 | 4524 | 4801 | 5188 | 6029 |
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