Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 325/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 31.52 (800.5) | 5.12 (130) 19.4% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 82.93 (2106.44) | 99.01 (2514.84) | 16.08 (408.41) 19.4% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 5.76 (146.25) | 2.56 (65) 80% |
| Revolutions per mile (km) | 764.01 (474.73) | 639.94 (397.64) | -124.07 (-77.1) -16.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.88 mph (38.43 km/h) |
| 25 mph (40.23 km/h) | 29.85 mph (48.03 km/h) |
| 30 mph (48.28 km/h) | 35.82 mph (57.64 km/h) |
| 35 mph (56.33 km/h) | 41.79 mph (67.25 km/h) |
| 40 mph (64.37 km/h) | 47.76 mph (76.86 km/h) |
| 45 mph (72.42 km/h) | 53.72 mph (86.46 km/h) |
| 50 mph (80.47 km/h) | 59.69 mph (96.07 km/h) |
| 55 mph (88.51 km/h) | 65.66 mph (105.68 km/h) |
| 60 mph (96.56 km/h) | 71.63 mph (115.28 km/h) |
| 65 mph (104.61 km/h) | 77.6 mph (124.89 km/h) |
| 70 mph (112.65 km/h) | 83.57 mph (134.5 km/h) |
| 75 mph (120.7 km/h) | 89.54 mph (144.1 km/h) |
| 80 mph (128.75 km/h) | 95.51 mph (153.71 km/h) |
| 85 mph (136.79 km/h) | 101.48 mph (163.32 km/h) |
| 90 mph (144.84 km/h) | 107.45 mph (172.92 km/h) |
| 95 mph (152.89 km/h) | 113.42 mph (182.53 km/h) |
| 100 mph (160.93 km/h) | 119.39 mph (192.14 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1629 | 1892 | 2037 | 2127 | 2224 | 2294 | 2370 | 2460 | 2585 | 2710 | 2848 | 2959 | 3160 | 3382 | 3555 | 3666 | 3728 | 3957 | 4276 | 4969 |
Better Fuel Economy Factory Ratios Increased Power
