Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/50-18 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.86 (682.2) | 25.97 (659.7) | -0.89 (-22.5) -3.3% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 84.38 (2143.19) | 81.59 (2072.51) | -2.78 (-70.69) -3.3% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 3.99 (101.25) | -0.44 (-11.25) -10% |
| Revolutions per mile (km) | 750.91 (466.59) | 776.52 (482.51) | 25.61 (15.91) 3.4% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.34 mph (31.13 km/h) |
| 25 mph (40.23 km/h) | 24.18 mph (38.91 km/h) |
| 30 mph (48.28 km/h) | 29.01 mph (46.69 km/h) |
| 35 mph (56.33 km/h) | 33.85 mph (54.47 km/h) |
| 40 mph (64.37 km/h) | 38.68 mph (62.25 km/h) |
| 45 mph (72.42 km/h) | 43.52 mph (70.03 km/h) |
| 50 mph (80.47 km/h) | 48.35 mph (77.81 km/h) |
| 55 mph (88.51 km/h) | 53.19 mph (85.59 km/h) |
| 60 mph (96.56 km/h) | 58.02 mph (93.38 km/h) |
| 65 mph (104.61 km/h) | 62.86 mph (101.16 km/h) |
| 70 mph (112.65 km/h) | 67.69 mph (108.94 km/h) |
| 75 mph (120.7 km/h) | 72.53 mph (116.72 km/h) |
| 80 mph (128.75 km/h) | 77.36 mph (124.5 km/h) |
| 85 mph (136.79 km/h) | 82.2 mph (132.28 km/h) |
| 90 mph (144.84 km/h) | 87.03 mph (140.06 km/h) |
| 95 mph (152.89 km/h) | 91.87 mph (147.85 km/h) |
| 100 mph (160.93 km/h) | 96.7 mph (155.63 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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