Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 325/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 39.19 (995.5) | 12.8 (325) 48.5% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 82.93 (2106.44) | 123.13 (3127.46) | 40.2 (1021.02) 48.5% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 9.6 (243.75) | 6.4 (162.5) 200% |
| Revolutions per mile (km) | 764.01 (474.73) | 514.59 (319.75) | -249.43 (-154.99) -32.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 29.69 mph (47.79 km/h) |
| 25 mph (40.23 km/h) | 37.12 mph (59.74 km/h) |
| 30 mph (48.28 km/h) | 44.54 mph (71.68 km/h) |
| 35 mph (56.33 km/h) | 51.96 mph (83.63 km/h) |
| 40 mph (64.37 km/h) | 59.39 mph (95.58 km/h) |
| 45 mph (72.42 km/h) | 66.81 mph (107.52 km/h) |
| 50 mph (80.47 km/h) | 74.24 mph (119.47 km/h) |
| 55 mph (88.51 km/h) | 81.66 mph (131.42 km/h) |
| 60 mph (96.56 km/h) | 89.08 mph (143.37 km/h) |
| 65 mph (104.61 km/h) | 96.51 mph (155.31 km/h) |
| 70 mph (112.65 km/h) | 103.93 mph (167.26 km/h) |
| 75 mph (120.7 km/h) | 111.35 mph (179.21 km/h) |
| 80 mph (128.75 km/h) | 118.78 mph (191.15 km/h) |
| 85 mph (136.79 km/h) | 126.2 mph (203.1 km/h) |
| 90 mph (144.84 km/h) | 133.62 mph (215.05 km/h) |
| 95 mph (152.89 km/h) | 141.05 mph (226.99 km/h) |
| 100 mph (160.93 km/h) | 148.47 mph (238.94 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1310 | 1521 | 1638 | 1711 | 1789 | 1844 | 1906 | 1978 | 2079 | 2179 | 2290 | 2379 | 2541 | 2719 | 2859 | 2948 | 2998 | 3182 | 3438 | 3995 |
Better Fuel Economy Factory Ratios Increased Power
