Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/40-18 | 250/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 29.81 (757.2) | 3.94 (100) 15.2% |
| Width inches (mm) | 9.84 (250) | 9.84 (250) | 0 (0) 0% |
| Circum. inches (mm) | 81.29 (2064.65) | 93.65 (2378.81) | 12.37 (314.16) 15.2% |
| Sidewall Height inches (mm) | 3.94 (100) | 5.91 (150) | 1.97 (50) 50% |
| Revolutions per mile (km) | 779.47 (484.34) | 676.53 (420.38) | -102.94 (-63.96) -13.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.04 mph (37.08 km/h) |
| 25 mph (40.23 km/h) | 28.8 mph (46.36 km/h) |
| 30 mph (48.28 km/h) | 34.56 mph (55.63 km/h) |
| 35 mph (56.33 km/h) | 40.33 mph (64.9 km/h) |
| 40 mph (64.37 km/h) | 46.09 mph (74.17 km/h) |
| 45 mph (72.42 km/h) | 51.85 mph (83.44 km/h) |
| 50 mph (80.47 km/h) | 57.61 mph (92.71 km/h) |
| 55 mph (88.51 km/h) | 63.37 mph (101.98 km/h) |
| 60 mph (96.56 km/h) | 69.13 mph (111.25 km/h) |
| 65 mph (104.61 km/h) | 74.89 mph (120.52 km/h) |
| 70 mph (112.65 km/h) | 80.65 mph (129.8 km/h) |
| 75 mph (120.7 km/h) | 86.41 mph (139.07 km/h) |
| 80 mph (128.75 km/h) | 92.17 mph (148.34 km/h) |
| 85 mph (136.79 km/h) | 97.93 mph (157.61 km/h) |
| 90 mph (144.84 km/h) | 103.69 mph (166.88 km/h) |
| 95 mph (152.89 km/h) | 109.46 mph (176.15 km/h) |
| 100 mph (160.93 km/h) | 115.22 mph (185.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1722 | 2000 | 2154 | 2249 | 2352 | 2425 | 2506 | 2601 | 2733 | 2865 | 3011 | 3128 | 3341 | 3575 | 3758 | 3876 | 3941 | 4183 | 4520 | 5253 |
Better Fuel Economy Factory Ratios Increased Power
