Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/40-18 | 150/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 22.72 (577.2) | -3.15 (-80) -12.2% |
| Width inches (mm) | 9.84 (250) | 5.91 (150) | -3.94 (-100) -40% |
| Circum. inches (mm) | 81.29 (2064.65) | 71.39 (1813.33) | -9.89 (-251.33) -12.2% |
| Sidewall Height inches (mm) | 3.94 (100) | 2.36 (60) | -1.57 (-40) -40% |
| Revolutions per mile (km) | 779.47 (484.34) | 887.51 (551.47) | 108.04 (67.13) 13.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.57 mph (28.27 km/h) |
| 25 mph (40.23 km/h) | 21.96 mph (35.34 km/h) |
| 30 mph (48.28 km/h) | 26.35 mph (42.4 km/h) |
| 35 mph (56.33 km/h) | 30.74 mph (49.47 km/h) |
| 40 mph (64.37 km/h) | 35.13 mph (56.54 km/h) |
| 45 mph (72.42 km/h) | 39.52 mph (63.6 km/h) |
| 50 mph (80.47 km/h) | 43.91 mph (70.67 km/h) |
| 55 mph (88.51 km/h) | 48.3 mph (77.74 km/h) |
| 60 mph (96.56 km/h) | 52.7 mph (84.81 km/h) |
| 65 mph (104.61 km/h) | 57.09 mph (91.87 km/h) |
| 70 mph (112.65 km/h) | 61.48 mph (98.94 km/h) |
| 75 mph (120.7 km/h) | 65.87 mph (106.01 km/h) |
| 80 mph (128.75 km/h) | 70.26 mph (113.08 km/h) |
| 85 mph (136.79 km/h) | 74.65 mph (120.14 km/h) |
| 90 mph (144.84 km/h) | 79.04 mph (127.21 km/h) |
| 95 mph (152.89 km/h) | 83.44 mph (134.28 km/h) |
| 100 mph (160.93 km/h) | 87.83 mph (141.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2259 | 2624 | 2826 | 2951 | 3085 | 3181 | 3287 | 3412 | 3585 | 3758 | 3950 | 4104 | 4383 | 4690 | 4930 | 5084 | 5171 | 5488 | 5930 | 6891 |
Better Fuel Economy Factory Ratios Increased Power
