Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 325/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 37.91 (963) | 11.52 (292.5) 43.6% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 82.93 (2106.44) | 119.11 (3025.35) | 36.18 (918.92) 43.6% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 8.96 (227.5) | 5.76 (146.25) 180% |
| Revolutions per mile (km) | 764.01 (474.73) | 531.95 (330.54) | -232.06 (-144.19) -30.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 28.72 mph (46.23 km/h) |
| 25 mph (40.23 km/h) | 35.91 mph (57.79 km/h) |
| 30 mph (48.28 km/h) | 43.09 mph (69.34 km/h) |
| 35 mph (56.33 km/h) | 50.27 mph (80.9 km/h) |
| 40 mph (64.37 km/h) | 57.45 mph (92.46 km/h) |
| 45 mph (72.42 km/h) | 64.63 mph (104.01 km/h) |
| 50 mph (80.47 km/h) | 71.81 mph (115.57 km/h) |
| 55 mph (88.51 km/h) | 78.99 mph (127.13 km/h) |
| 60 mph (96.56 km/h) | 86.17 mph (138.68 km/h) |
| 65 mph (104.61 km/h) | 93.36 mph (150.24 km/h) |
| 70 mph (112.65 km/h) | 100.54 mph (161.8 km/h) |
| 75 mph (120.7 km/h) | 107.72 mph (173.36 km/h) |
| 80 mph (128.75 km/h) | 114.9 mph (184.91 km/h) |
| 85 mph (136.79 km/h) | 122.08 mph (196.47 km/h) |
| 90 mph (144.84 km/h) | 129.26 mph (208.03 km/h) |
| 95 mph (152.89 km/h) | 136.44 mph (219.58 km/h) |
| 100 mph (160.93 km/h) | 143.62 mph (231.14 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1354 | 1573 | 1694 | 1768 | 1849 | 1907 | 1970 | 2045 | 2149 | 2252 | 2368 | 2460 | 2627 | 2811 | 2955 | 3047 | 3099 | 3289 | 3554 | 4130 |
Better Fuel Economy Factory Ratios Increased Power
