Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/40-18 | 250/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 29.8 (756.8) | 3.92 (99.6) 15.2% |
| Width inches (mm) | 9.84 (250) | 9.84 (250) | 0 (0) 0% |
| Circum. inches (mm) | 81.29 (2064.65) | 93.6 (2377.56) | 12.32 (312.9) 15.2% |
| Sidewall Height inches (mm) | 3.94 (100) | 6.4 (162.5) | 2.46 (62.5) 62.5% |
| Revolutions per mile (km) | 779.47 (484.34) | 676.89 (420.6) | -102.58 (-63.74) -13.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.03 mph (37.06 km/h) |
| 25 mph (40.23 km/h) | 28.79 mph (46.33 km/h) |
| 30 mph (48.28 km/h) | 34.55 mph (55.6 km/h) |
| 35 mph (56.33 km/h) | 40.3 mph (64.86 km/h) |
| 40 mph (64.37 km/h) | 46.06 mph (74.13 km/h) |
| 45 mph (72.42 km/h) | 51.82 mph (83.4 km/h) |
| 50 mph (80.47 km/h) | 57.58 mph (92.66 km/h) |
| 55 mph (88.51 km/h) | 63.34 mph (101.93 km/h) |
| 60 mph (96.56 km/h) | 69.09 mph (111.19 km/h) |
| 65 mph (104.61 km/h) | 74.85 mph (120.46 km/h) |
| 70 mph (112.65 km/h) | 80.61 mph (129.73 km/h) |
| 75 mph (120.7 km/h) | 86.37 mph (138.99 km/h) |
| 80 mph (128.75 km/h) | 92.12 mph (148.26 km/h) |
| 85 mph (136.79 km/h) | 97.88 mph (157.53 km/h) |
| 90 mph (144.84 km/h) | 103.64 mph (166.79 km/h) |
| 95 mph (152.89 km/h) | 109.4 mph (176.06 km/h) |
| 100 mph (160.93 km/h) | 115.16 mph (185.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1723 | 2001 | 2155 | 2250 | 2353 | 2426 | 2507 | 2602 | 2734 | 2866 | 3013 | 3130 | 3342 | 3577 | 3760 | 3878 | 3944 | 4185 | 4523 | 5256 |
Better Fuel Economy Factory Ratios Increased Power
