Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 240/45-18 | 240/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 28.39 (721.2) | 1.89 (48) 7.1% |
| Width inches (mm) | 9.45 (240) | 9.45 (240) | 0 (0) 0% |
| Circum. inches (mm) | 83.26 (2114.92) | 89.2 (2265.72) | 5.94 (150.8) 7.1% |
| Sidewall Height inches (mm) | 4.25 (108) | 5.2 (132) | 0.94 (24) 22.2% |
| Revolutions per mile (km) | 760.95 (472.83) | 710.3 (441.36) | -50.65 (-31.47) -6.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.43 mph (34.48 km/h) |
| 25 mph (40.23 km/h) | 26.78 mph (43.1 km/h) |
| 30 mph (48.28 km/h) | 32.14 mph (51.72 km/h) |
| 35 mph (56.33 km/h) | 37.5 mph (60.34 km/h) |
| 40 mph (64.37 km/h) | 42.85 mph (68.96 km/h) |
| 45 mph (72.42 km/h) | 48.21 mph (77.58 km/h) |
| 50 mph (80.47 km/h) | 53.57 mph (86.2 km/h) |
| 55 mph (88.51 km/h) | 58.92 mph (94.83 km/h) |
| 60 mph (96.56 km/h) | 64.28 mph (103.45 km/h) |
| 65 mph (104.61 km/h) | 69.63 mph (112.07 km/h) |
| 70 mph (112.65 km/h) | 74.99 mph (120.69 km/h) |
| 75 mph (120.7 km/h) | 80.35 mph (129.31 km/h) |
| 80 mph (128.75 km/h) | 85.7 mph (137.93 km/h) |
| 85 mph (136.79 km/h) | 91.06 mph (146.55 km/h) |
| 90 mph (144.84 km/h) | 96.42 mph (155.17 km/h) |
| 95 mph (152.89 km/h) | 101.77 mph (163.79 km/h) |
| 100 mph (160.93 km/h) | 107.13 mph (172.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1808 | 2100 | 2261 | 2361 | 2469 | 2546 | 2631 | 2731 | 2869 | 3008 | 3161 | 3284 | 3507 | 3754 | 3946 | 4069 | 4138 | 4392 | 4746 | 5515 |
Better Fuel Economy Factory Ratios Increased Power
