Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/40-18 | 240/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 29.34 (745.2) | 3.46 (88) 13.4% |
| Width inches (mm) | 9.84 (250) | 9.45 (240) | -0.39 (-10) -4% |
| Circum. inches (mm) | 81.29 (2064.65) | 92.17 (2341.11) | 10.88 (276.46) 13.4% |
| Sidewall Height inches (mm) | 3.94 (100) | 5.67 (144) | 1.73 (44) 44% |
| Revolutions per mile (km) | 779.47 (484.34) | 687.43 (427.15) | -92.05 (-57.2) -11.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.68 mph (36.5 km/h) |
| 25 mph (40.23 km/h) | 28.35 mph (45.62 km/h) |
| 30 mph (48.28 km/h) | 34.02 mph (54.75 km/h) |
| 35 mph (56.33 km/h) | 39.69 mph (63.87 km/h) |
| 40 mph (64.37 km/h) | 45.36 mph (72.99 km/h) |
| 45 mph (72.42 km/h) | 51.03 mph (82.12 km/h) |
| 50 mph (80.47 km/h) | 56.7 mph (91.24 km/h) |
| 55 mph (88.51 km/h) | 62.36 mph (100.37 km/h) |
| 60 mph (96.56 km/h) | 68.03 mph (109.49 km/h) |
| 65 mph (104.61 km/h) | 73.7 mph (118.61 km/h) |
| 70 mph (112.65 km/h) | 79.37 mph (127.74 km/h) |
| 75 mph (120.7 km/h) | 85.04 mph (136.86 km/h) |
| 80 mph (128.75 km/h) | 90.71 mph (145.99 km/h) |
| 85 mph (136.79 km/h) | 96.38 mph (155.11 km/h) |
| 90 mph (144.84 km/h) | 102.05 mph (164.24 km/h) |
| 95 mph (152.89 km/h) | 107.72 mph (173.36 km/h) |
| 100 mph (160.93 km/h) | 113.39 mph (182.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1749 | 2032 | 2189 | 2285 | 2390 | 2464 | 2546 | 2643 | 2777 | 2911 | 3060 | 3179 | 3395 | 3633 | 3819 | 3938 | 4005 | 4251 | 4593 | 5337 |
Better Fuel Economy Factory Ratios Increased Power
