Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-20 | 325/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.2 (665.5) | 32.8 (833) | 6.59 (167.5) 25.2% |
| Width inches (mm) | 12.4 (315) | 12.8 (325) | 0.39 (10) 3.2% |
| Circum. inches (mm) | 82.31 (2090.73) | 103.03 (2616.95) | 20.72 (526.22) 25.2% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 6.4 (162.5) | 3.3 (83.75) 106.3% |
| Revolutions per mile (km) | 769.75 (478.3) | 614.97 (382.12) | -154.78 (-96.18) -20.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.03 mph (40.29 km/h) |
| 25 mph (40.23 km/h) | 31.29 mph (50.36 km/h) |
| 30 mph (48.28 km/h) | 37.55 mph (60.43 km/h) |
| 35 mph (56.33 km/h) | 43.81 mph (70.5 km/h) |
| 40 mph (64.37 km/h) | 50.07 mph (80.58 km/h) |
| 45 mph (72.42 km/h) | 56.33 mph (90.65 km/h) |
| 50 mph (80.47 km/h) | 62.58 mph (100.72 km/h) |
| 55 mph (88.51 km/h) | 68.84 mph (110.79 km/h) |
| 60 mph (96.56 km/h) | 75.1 mph (120.86 km/h) |
| 65 mph (104.61 km/h) | 81.36 mph (130.94 km/h) |
| 70 mph (112.65 km/h) | 87.62 mph (141.01 km/h) |
| 75 mph (120.7 km/h) | 93.88 mph (151.08 km/h) |
| 80 mph (128.75 km/h) | 100.14 mph (161.15 km/h) |
| 85 mph (136.79 km/h) | 106.39 mph (171.22 km/h) |
| 90 mph (144.84 km/h) | 112.65 mph (181.3 km/h) |
| 95 mph (152.89 km/h) | 118.91 mph (191.37 km/h) |
| 100 mph (160.93 km/h) | 125.17 mph (201.44 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1565 | 1818 | 1958 | 2044 | 2138 | 2204 | 2278 | 2364 | 2484 | 2604 | 2737 | 2844 | 3037 | 3250 | 3416 | 3523 | 3583 | 3803 | 4109 | 4775 |
Better Fuel Economy Factory Ratios Increased Power
