Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-12 | 390/75-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.15 (486.3) | 39.03 (991.4) | 19.89 (505.1) 103.9% |
| Width inches (mm) | 6.5 (165) | 15.35 (390) | 8.86 (225) 136.4% |
| Circum. inches (mm) | 60.15 (1527.76) | 122.62 (3114.57) | 62.47 (1586.82) 103.9% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 11.52 (292.5) | 7.94 (201.75) 222.3% |
| Revolutions per mile (km) | 1053.4 (654.55) | 516.71 (321.07) | -536.69 (-333.48) -50.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 40.77 mph (65.62 km/h) |
| 25 mph (40.23 km/h) | 50.97 mph (82.02 km/h) |
| 30 mph (48.28 km/h) | 61.16 mph (98.43 km/h) |
| 35 mph (56.33 km/h) | 71.35 mph (114.83 km/h) |
| 40 mph (64.37 km/h) | 81.55 mph (131.24 km/h) |
| 45 mph (72.42 km/h) | 91.74 mph (147.64 km/h) |
| 50 mph (80.47 km/h) | 101.93 mph (164.05 km/h) |
| 55 mph (88.51 km/h) | 112.13 mph (180.45 km/h) |
| 60 mph (96.56 km/h) | 122.32 mph (196.85 km/h) |
| 65 mph (104.61 km/h) | 132.51 mph (213.26 km/h) |
| 70 mph (112.65 km/h) | 142.71 mph (229.66 km/h) |
| 75 mph (120.7 km/h) | 152.9 mph (246.07 km/h) |
| 80 mph (128.75 km/h) | 163.09 mph (262.47 km/h) |
| 85 mph (136.79 km/h) | 173.29 mph (278.88 km/h) |
| 90 mph (144.84 km/h) | 183.48 mph (295.28 km/h) |
| 95 mph (152.89 km/h) | 193.67 mph (311.69 km/h) |
| 100 mph (160.93 km/h) | 203.87 mph (328.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1315 | 1528 | 1645 | 1718 | 1796 | 1852 | 1914 | 1986 | 2087 | 2188 | 2300 | 2389 | 2552 | 2731 | 2870 | 2960 | 3010 | 3195 | 3452 | 4012 |
Better Fuel Economy Factory Ratios Increased Power
