Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 325/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 36.63 (930.5) | 10.24 (260) 38.8% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 82.93 (2106.44) | 115.09 (2923.25) | 32.16 (816.81) 38.8% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 8.32 (211.25) | 5.12 (130) 160% |
| Revolutions per mile (km) | 764.01 (474.73) | 550.53 (342.08) | -213.48 (-132.65) -27.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.76 mph (44.67 km/h) |
| 25 mph (40.23 km/h) | 34.69 mph (55.84 km/h) |
| 30 mph (48.28 km/h) | 41.63 mph (67 km/h) |
| 35 mph (56.33 km/h) | 48.57 mph (78.17 km/h) |
| 40 mph (64.37 km/h) | 55.51 mph (89.34 km/h) |
| 45 mph (72.42 km/h) | 62.45 mph (100.5 km/h) |
| 50 mph (80.47 km/h) | 69.39 mph (111.67 km/h) |
| 55 mph (88.51 km/h) | 76.33 mph (122.84 km/h) |
| 60 mph (96.56 km/h) | 83.27 mph (134 km/h) |
| 65 mph (104.61 km/h) | 90.21 mph (145.17 km/h) |
| 70 mph (112.65 km/h) | 97.14 mph (156.34 km/h) |
| 75 mph (120.7 km/h) | 104.08 mph (167.51 km/h) |
| 80 mph (128.75 km/h) | 111.02 mph (178.67 km/h) |
| 85 mph (136.79 km/h) | 117.96 mph (189.84 km/h) |
| 90 mph (144.84 km/h) | 124.9 mph (201.01 km/h) |
| 95 mph (152.89 km/h) | 131.84 mph (212.17 km/h) |
| 100 mph (160.93 km/h) | 138.78 mph (223.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1401 | 1628 | 1753 | 1830 | 1914 | 1973 | 2039 | 2116 | 2224 | 2331 | 2450 | 2546 | 2719 | 2909 | 3058 | 3154 | 3207 | 3404 | 3678 | 4275 |
Better Fuel Economy Factory Ratios Increased Power
