Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 375/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 36.24 (920.5) | 9.84 (250) 37.3% |
| Width inches (mm) | 12.8 (325) | 14.76 (375) | 1.97 (50) 15.4% |
| Circum. inches (mm) | 82.93 (2106.44) | 113.85 (2891.84) | 30.92 (785.4) 37.3% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 8.12 (206.25) | 4.92 (125) 153.8% |
| Revolutions per mile (km) | 764.01 (474.73) | 556.51 (345.8) | -207.5 (-128.93) -27.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.46 mph (44.19 km/h) |
| 25 mph (40.23 km/h) | 34.32 mph (55.24 km/h) |
| 30 mph (48.28 km/h) | 41.19 mph (66.28 km/h) |
| 35 mph (56.33 km/h) | 48.05 mph (77.33 km/h) |
| 40 mph (64.37 km/h) | 54.91 mph (88.38 km/h) |
| 45 mph (72.42 km/h) | 61.78 mph (99.42 km/h) |
| 50 mph (80.47 km/h) | 68.64 mph (110.47 km/h) |
| 55 mph (88.51 km/h) | 75.51 mph (121.52 km/h) |
| 60 mph (96.56 km/h) | 82.37 mph (132.56 km/h) |
| 65 mph (104.61 km/h) | 89.24 mph (143.61 km/h) |
| 70 mph (112.65 km/h) | 96.1 mph (154.66 km/h) |
| 75 mph (120.7 km/h) | 102.96 mph (165.71 km/h) |
| 80 mph (128.75 km/h) | 109.83 mph (176.75 km/h) |
| 85 mph (136.79 km/h) | 116.69 mph (187.8 km/h) |
| 90 mph (144.84 km/h) | 123.56 mph (198.85 km/h) |
| 95 mph (152.89 km/h) | 130.42 mph (209.89 km/h) |
| 100 mph (160.93 km/h) | 137.29 mph (220.94 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1416 | 1645 | 1772 | 1850 | 1934 | 1995 | 2061 | 2139 | 2248 | 2356 | 2477 | 2573 | 2748 | 2941 | 3092 | 3188 | 3242 | 3441 | 3718 | 4321 |
Better Fuel Economy Factory Ratios Increased Power
