Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 305/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 36.81 (935) | 10.41 (264.5) 39.4% |
| Width inches (mm) | 12.8 (325) | 12.01 (305) | -0.79 (-20) -6.2% |
| Circum. inches (mm) | 82.93 (2106.44) | 115.65 (2937.39) | 32.71 (830.95) 39.4% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 8.41 (213.5) | 5.21 (132.25) 162.8% |
| Revolutions per mile (km) | 764.01 (474.73) | 547.88 (340.44) | -216.13 (-134.3) -28.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.89 mph (44.88 km/h) |
| 25 mph (40.23 km/h) | 34.86 mph (56.11 km/h) |
| 30 mph (48.28 km/h) | 41.83 mph (67.33 km/h) |
| 35 mph (56.33 km/h) | 48.81 mph (78.55 km/h) |
| 40 mph (64.37 km/h) | 55.78 mph (89.77 km/h) |
| 45 mph (72.42 km/h) | 62.75 mph (100.99 km/h) |
| 50 mph (80.47 km/h) | 69.72 mph (112.21 km/h) |
| 55 mph (88.51 km/h) | 76.7 mph (123.43 km/h) |
| 60 mph (96.56 km/h) | 83.67 mph (134.65 km/h) |
| 65 mph (104.61 km/h) | 90.64 mph (145.87 km/h) |
| 70 mph (112.65 km/h) | 97.61 mph (157.09 km/h) |
| 75 mph (120.7 km/h) | 104.59 mph (168.32 km/h) |
| 80 mph (128.75 km/h) | 111.56 mph (179.54 km/h) |
| 85 mph (136.79 km/h) | 118.53 mph (190.76 km/h) |
| 90 mph (144.84 km/h) | 125.5 mph (201.98 km/h) |
| 95 mph (152.89 km/h) | 132.48 mph (213.2 km/h) |
| 100 mph (160.93 km/h) | 139.45 mph (224.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1394 | 1620 | 1744 | 1821 | 1904 | 1964 | 2029 | 2106 | 2213 | 2320 | 2438 | 2533 | 2705 | 2895 | 3044 | 3139 | 3192 | 3388 | 3661 | 4254 |
Better Fuel Economy Factory Ratios Increased Power
