Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/45-18 | 240/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.26 (641.7) | 26.5 (673.2) | 1.24 (31.5) 4.9% |
| Width inches (mm) | 8.07 (205) | 9.45 (240) | 1.38 (35) 17.1% |
| Circum. inches (mm) | 79.37 (2015.96) | 83.26 (2114.92) | 3.9 (98.96) 4.9% |
| Sidewall Height inches (mm) | 3.63 (92.25) | 4.25 (108) | 0.62 (15.75) 17.1% |
| Revolutions per mile (km) | 798.3 (496.04) | 760.95 (472.83) | -37.35 (-23.21) -4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.98 mph (33.77 km/h) |
| 25 mph (40.23 km/h) | 26.23 mph (42.21 km/h) |
| 30 mph (48.28 km/h) | 31.47 mph (50.65 km/h) |
| 35 mph (56.33 km/h) | 36.72 mph (59.09 km/h) |
| 40 mph (64.37 km/h) | 41.96 mph (67.53 km/h) |
| 45 mph (72.42 km/h) | 47.21 mph (75.98 km/h) |
| 50 mph (80.47 km/h) | 52.45 mph (84.42 km/h) |
| 55 mph (88.51 km/h) | 57.7 mph (92.86 km/h) |
| 60 mph (96.56 km/h) | 62.95 mph (101.3 km/h) |
| 65 mph (104.61 km/h) | 68.19 mph (109.74 km/h) |
| 70 mph (112.65 km/h) | 73.44 mph (118.18 km/h) |
| 75 mph (120.7 km/h) | 78.68 mph (126.63 km/h) |
| 80 mph (128.75 km/h) | 83.93 mph (135.07 km/h) |
| 85 mph (136.79 km/h) | 89.17 mph (143.51 km/h) |
| 90 mph (144.84 km/h) | 94.42 mph (151.95 km/h) |
| 95 mph (152.89 km/h) | 99.66 mph (160.39 km/h) |
| 100 mph (160.93 km/h) | 104.91 mph (168.83 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1936 | 2250 | 2423 | 2530 | 2645 | 2728 | 2818 | 2925 | 3074 | 3222 | 3387 | 3519 | 3758 | 4021 | 4227 | 4359 | 4433 | 4705 | 5084 | 5908 |
Better Fuel Economy Factory Ratios Increased Power
