Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/90-16 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.86 (631.4) | 25.97 (659.7) | 1.11 (28.3) 4.5% |
| Width inches (mm) | 4.92 (125) | 8.86 (225) | 3.94 (100) 80% |
| Circum. inches (mm) | 78.09 (1983.6) | 81.59 (2072.51) | 3.5 (88.91) 4.5% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 3.99 (101.25) | -0.44 (-11.25) -10% |
| Revolutions per mile (km) | 811.32 (504.13) | 776.52 (482.51) | -34.8 (-21.63) -4.3% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.9 mph (33.63 km/h) |
| 25 mph (40.23 km/h) | 26.12 mph (42.04 km/h) |
| 30 mph (48.28 km/h) | 31.34 mph (50.44 km/h) |
| 35 mph (56.33 km/h) | 36.57 mph (58.85 km/h) |
| 40 mph (64.37 km/h) | 41.79 mph (67.26 km/h) |
| 45 mph (72.42 km/h) | 47.02 mph (75.67 km/h) |
| 50 mph (80.47 km/h) | 52.24 mph (84.07 km/h) |
| 55 mph (88.51 km/h) | 57.47 mph (92.48 km/h) |
| 60 mph (96.56 km/h) | 62.69 mph (100.89 km/h) |
| 65 mph (104.61 km/h) | 67.91 mph (109.3 km/h) |
| 70 mph (112.65 km/h) | 73.14 mph (117.7 km/h) |
| 75 mph (120.7 km/h) | 78.36 mph (126.11 km/h) |
| 80 mph (128.75 km/h) | 83.59 mph (134.52 km/h) |
| 85 mph (136.79 km/h) | 88.81 mph (142.93 km/h) |
| 90 mph (144.84 km/h) | 94.03 mph (151.33 km/h) |
| 95 mph (152.89 km/h) | 99.26 mph (159.74 km/h) |
| 100 mph (160.93 km/h) | 104.48 mph (168.15 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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