Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/55-16 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.88 (631.9) | 25.97 (659.7) | 1.09 (27.8) 4.4% |
| Width inches (mm) | 8.07 (205) | 8.86 (225) | 0.79 (20) 9.8% |
| Circum. inches (mm) | 78.16 (1985.17) | 81.59 (2072.51) | 3.44 (87.34) 4.4% |
| Sidewall Height inches (mm) | 4.44 (112.75) | 3.99 (101.25) | -0.45 (-11.5) -10.2% |
| Revolutions per mile (km) | 810.68 (503.73) | 776.52 (482.51) | -34.16 (-21.23) -4.2% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.88 mph (33.6 km/h) |
| 25 mph (40.23 km/h) | 26.1 mph (42 km/h) |
| 30 mph (48.28 km/h) | 31.32 mph (50.4 km/h) |
| 35 mph (56.33 km/h) | 36.54 mph (58.81 km/h) |
| 40 mph (64.37 km/h) | 41.76 mph (67.21 km/h) |
| 45 mph (72.42 km/h) | 46.98 mph (75.61 km/h) |
| 50 mph (80.47 km/h) | 52.2 mph (84.01 km/h) |
| 55 mph (88.51 km/h) | 57.42 mph (92.41 km/h) |
| 60 mph (96.56 km/h) | 62.64 mph (100.81 km/h) |
| 65 mph (104.61 km/h) | 67.86 mph (109.21 km/h) |
| 70 mph (112.65 km/h) | 73.08 mph (117.61 km/h) |
| 75 mph (120.7 km/h) | 78.3 mph (126.01 km/h) |
| 80 mph (128.75 km/h) | 83.52 mph (134.41 km/h) |
| 85 mph (136.79 km/h) | 88.74 mph (142.81 km/h) |
| 90 mph (144.84 km/h) | 93.96 mph (151.21 km/h) |
| 95 mph (152.89 km/h) | 99.18 mph (159.61 km/h) |
| 100 mph (160.93 km/h) | 104.4 mph (168.01 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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