Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/40-18 | 260/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 28.24 (717.2) | 2.36 (60) 9.1% |
| Width inches (mm) | 9.84 (250) | 10.24 (260) | 0.39 (10) 4% |
| Circum. inches (mm) | 81.29 (2064.65) | 88.71 (2253.15) | 7.42 (188.5) 9.1% |
| Sidewall Height inches (mm) | 3.94 (100) | 5.12 (130) | 1.18 (30) 30% |
| Revolutions per mile (km) | 779.47 (484.34) | 714.26 (443.82) | -65.21 (-40.52) -8.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.83 mph (35.13 km/h) |
| 25 mph (40.23 km/h) | 27.28 mph (43.91 km/h) |
| 30 mph (48.28 km/h) | 32.74 mph (52.69 km/h) |
| 35 mph (56.33 km/h) | 38.2 mph (61.47 km/h) |
| 40 mph (64.37 km/h) | 43.65 mph (70.25 km/h) |
| 45 mph (72.42 km/h) | 49.11 mph (79.03 km/h) |
| 50 mph (80.47 km/h) | 54.56 mph (87.81 km/h) |
| 55 mph (88.51 km/h) | 60.02 mph (96.6 km/h) |
| 60 mph (96.56 km/h) | 65.48 mph (105.38 km/h) |
| 65 mph (104.61 km/h) | 70.93 mph (114.16 km/h) |
| 70 mph (112.65 km/h) | 76.39 mph (122.94 km/h) |
| 75 mph (120.7 km/h) | 81.85 mph (131.72 km/h) |
| 80 mph (128.75 km/h) | 87.3 mph (140.5 km/h) |
| 85 mph (136.79 km/h) | 92.76 mph (149.28 km/h) |
| 90 mph (144.84 km/h) | 98.22 mph (158.06 km/h) |
| 95 mph (152.89 km/h) | 103.67 mph (166.85 km/h) |
| 100 mph (160.93 km/h) | 109.13 mph (175.63 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1818 | 2112 | 2274 | 2375 | 2483 | 2560 | 2645 | 2746 | 2885 | 3024 | 3179 | 3303 | 3527 | 3775 | 3968 | 4092 | 4161 | 4417 | 4772 | 5546 |
Better Fuel Economy Factory Ratios Increased Power
