Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 325/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 27.68 (703) | 1.28 (32.5) 4.8% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 82.93 (2106.44) | 86.95 (2208.54) | 4.02 (102.1) 4.8% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 3.84 (97.5) | 0.64 (16.25) 20% |
| Revolutions per mile (km) | 764.01 (474.73) | 728.69 (452.79) | -35.32 (-21.95) -4.6% |
325/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.97 mph (33.75 km/h) |
| 25 mph (40.23 km/h) | 26.21 mph (42.18 km/h) |
| 30 mph (48.28 km/h) | 31.45 mph (50.62 km/h) |
| 35 mph (56.33 km/h) | 36.7 mph (59.06 km/h) |
| 40 mph (64.37 km/h) | 41.94 mph (67.49 km/h) |
| 45 mph (72.42 km/h) | 47.18 mph (75.93 km/h) |
| 50 mph (80.47 km/h) | 52.42 mph (84.37 km/h) |
| 55 mph (88.51 km/h) | 57.67 mph (92.8 km/h) |
| 60 mph (96.56 km/h) | 62.91 mph (101.24 km/h) |
| 65 mph (104.61 km/h) | 68.15 mph (109.68 km/h) |
| 70 mph (112.65 km/h) | 73.39 mph (118.11 km/h) |
| 75 mph (120.7 km/h) | 78.64 mph (126.55 km/h) |
| 80 mph (128.75 km/h) | 83.88 mph (134.99 km/h) |
| 85 mph (136.79 km/h) | 89.12 mph (143.43 km/h) |
| 90 mph (144.84 km/h) | 94.36 mph (151.86 km/h) |
| 95 mph (152.89 km/h) | 99.6 mph (160.3 km/h) |
| 100 mph (160.93 km/h) | 104.85 mph (168.74 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1854 | 2154 | 2320 | 2423 | 2533 | 2612 | 2699 | 2801 | 2943 | 3085 | 3243 | 3369 | 3598 | 3851 | 4048 | 4174 | 4245 | 4506 | 4869 | 5658 |
Better Fuel Economy Factory Ratios Increased Power
