Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-18 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.89 (632.2) | 25.97 (659.7) | 1.08 (27.5) 4.3% |
| Width inches (mm) | 4.92 (125) | 8.86 (225) | 3.94 (100) 80% |
| Circum. inches (mm) | 78.19 (1986.11) | 81.59 (2072.51) | 3.4 (86.39) 4.3% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 3.99 (101.25) | 0.54 (13.75) 15.7% |
| Revolutions per mile (km) | 810.3 (503.49) | 776.52 (482.51) | -33.78 (-20.99) -4.2% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.87 mph (33.59 km/h) |
| 25 mph (40.23 km/h) | 26.09 mph (41.98 km/h) |
| 30 mph (48.28 km/h) | 31.3 mph (50.38 km/h) |
| 35 mph (56.33 km/h) | 36.52 mph (58.78 km/h) |
| 40 mph (64.37 km/h) | 41.74 mph (67.17 km/h) |
| 45 mph (72.42 km/h) | 46.96 mph (75.57 km/h) |
| 50 mph (80.47 km/h) | 52.17 mph (83.97 km/h) |
| 55 mph (88.51 km/h) | 57.39 mph (92.36 km/h) |
| 60 mph (96.56 km/h) | 62.61 mph (100.76 km/h) |
| 65 mph (104.61 km/h) | 67.83 mph (109.16 km/h) |
| 70 mph (112.65 km/h) | 73.04 mph (117.55 km/h) |
| 75 mph (120.7 km/h) | 78.26 mph (125.95 km/h) |
| 80 mph (128.75 km/h) | 83.48 mph (134.35 km/h) |
| 85 mph (136.79 km/h) | 88.7 mph (142.74 km/h) |
| 90 mph (144.84 km/h) | 93.91 mph (151.14 km/h) |
| 95 mph (152.89 km/h) | 99.13 mph (159.54 km/h) |
| 100 mph (160.93 km/h) | 104.35 mph (167.94 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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