Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/50-17 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.86 (656.8) | 25.97 (659.7) | 0.11 (2.9) 0.4% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 81.24 (2063.4) | 81.59 (2072.51) | 0.36 (9.11) 0.4% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 3.99 (101.25) | -0.44 (-11.25) -10% |
| Revolutions per mile (km) | 779.95 (484.64) | 776.52 (482.51) | -3.43 (-2.13) -0.4% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.09 mph (32.33 km/h) |
| 25 mph (40.23 km/h) | 25.11 mph (40.41 km/h) |
| 30 mph (48.28 km/h) | 30.13 mph (48.49 km/h) |
| 35 mph (56.33 km/h) | 35.15 mph (56.58 km/h) |
| 40 mph (64.37 km/h) | 40.18 mph (64.66 km/h) |
| 45 mph (72.42 km/h) | 45.2 mph (72.74 km/h) |
| 50 mph (80.47 km/h) | 50.22 mph (80.82 km/h) |
| 55 mph (88.51 km/h) | 55.24 mph (88.9 km/h) |
| 60 mph (96.56 km/h) | 60.26 mph (96.99 km/h) |
| 65 mph (104.61 km/h) | 65.29 mph (105.07 km/h) |
| 70 mph (112.65 km/h) | 70.31 mph (113.15 km/h) |
| 75 mph (120.7 km/h) | 75.33 mph (121.23 km/h) |
| 80 mph (128.75 km/h) | 80.35 mph (129.32 km/h) |
| 85 mph (136.79 km/h) | 85.38 mph (137.4 km/h) |
| 90 mph (144.84 km/h) | 90.4 mph (145.48 km/h) |
| 95 mph (152.89 km/h) | 95.42 mph (153.56 km/h) |
| 100 mph (160.93 km/h) | 100.44 mph (161.65 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 |
Better Fuel Economy Factory Ratios Increased Power
