Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-19 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.89 (657.6) | 25.97 (659.7) | 0.08 (2.1) 0.3% |
| Width inches (mm) | 4.92 (125) | 8.86 (225) | 3.94 (100) 80% |
| Circum. inches (mm) | 81.34 (2065.91) | 81.59 (2072.51) | 0.26 (6.6) 0.3% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 3.99 (101.25) | 0.54 (13.75) 15.7% |
| Revolutions per mile (km) | 779 (484.05) | 776.52 (482.51) | -2.48 (-1.54) -0.3% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.06 mph (32.29 km/h) |
| 25 mph (40.23 km/h) | 25.08 mph (40.36 km/h) |
| 30 mph (48.28 km/h) | 30.1 mph (48.43 km/h) |
| 35 mph (56.33 km/h) | 35.11 mph (56.51 km/h) |
| 40 mph (64.37 km/h) | 40.13 mph (64.58 km/h) |
| 45 mph (72.42 km/h) | 45.14 mph (72.65 km/h) |
| 50 mph (80.47 km/h) | 50.16 mph (80.72 km/h) |
| 55 mph (88.51 km/h) | 55.18 mph (88.8 km/h) |
| 60 mph (96.56 km/h) | 60.19 mph (96.87 km/h) |
| 65 mph (104.61 km/h) | 65.21 mph (104.94 km/h) |
| 70 mph (112.65 km/h) | 70.22 mph (113.01 km/h) |
| 75 mph (120.7 km/h) | 75.24 mph (121.09 km/h) |
| 80 mph (128.75 km/h) | 80.26 mph (129.16 km/h) |
| 85 mph (136.79 km/h) | 85.27 mph (137.23 km/h) |
| 90 mph (144.84 km/h) | 90.29 mph (145.3 km/h) |
| 95 mph (152.89 km/h) | 95.3 mph (153.38 km/h) |
| 100 mph (160.93 km/h) | 100.32 mph (161.45 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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