Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 150/70-15 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.27 (591) | 25.97 (659.7) | 2.7 (68.7) 11.6% |
| Width inches (mm) | 5.91 (150) | 8.86 (225) | 2.95 (75) 50% |
| Circum. inches (mm) | 73.1 (1856.68) | 81.59 (2072.51) | 8.5 (215.83) 11.6% |
| Sidewall Height inches (mm) | 4.13 (105) | 3.99 (101.25) | -0.15 (-3.75) -3.6% |
| Revolutions per mile (km) | 866.79 (538.59) | 776.52 (482.51) | -90.27 (-56.09) -10.4% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.32 mph (35.93 km/h) |
| 25 mph (40.23 km/h) | 27.91 mph (44.91 km/h) |
| 30 mph (48.28 km/h) | 33.49 mph (53.89 km/h) |
| 35 mph (56.33 km/h) | 39.07 mph (62.87 km/h) |
| 40 mph (64.37 km/h) | 44.65 mph (71.86 km/h) |
| 45 mph (72.42 km/h) | 50.23 mph (80.84 km/h) |
| 50 mph (80.47 km/h) | 55.81 mph (89.82 km/h) |
| 55 mph (88.51 km/h) | 61.39 mph (98.8 km/h) |
| 60 mph (96.56 km/h) | 66.97 mph (107.79 km/h) |
| 65 mph (104.61 km/h) | 72.56 mph (116.77 km/h) |
| 70 mph (112.65 km/h) | 78.14 mph (125.75 km/h) |
| 75 mph (120.7 km/h) | 83.72 mph (134.73 km/h) |
| 80 mph (128.75 km/h) | 89.3 mph (143.71 km/h) |
| 85 mph (136.79 km/h) | 94.88 mph (152.7 km/h) |
| 90 mph (144.84 km/h) | 100.46 mph (161.68 km/h) |
| 95 mph (152.89 km/h) | 106.04 mph (170.66 km/h) |
| 100 mph (160.93 km/h) | 111.62 mph (179.64 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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