Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/25-20 | 250/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26 (660.5) | 25.91 (658) | -0.1 (-2.5) -0.4% |
| Width inches (mm) | 12.01 (305) | 9.84 (250) | -2.17 (-55) -18% |
| Circum. inches (mm) | 81.69 (2075.02) | 81.38 (2067.17) | -0.31 (-7.85) -0.4% |
| Sidewall Height inches (mm) | 3 (76.25) | 2.95 (75) | -0.05 (-1.25) -1.6% |
| Revolutions per mile (km) | 775.58 (481.92) | 778.53 (483.75) | 2.95 (1.83) 0.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.92 mph (32.07 km/h) |
| 25 mph (40.23 km/h) | 24.91 mph (40.08 km/h) |
| 30 mph (48.28 km/h) | 29.89 mph (48.1 km/h) |
| 35 mph (56.33 km/h) | 34.87 mph (56.11 km/h) |
| 40 mph (64.37 km/h) | 39.85 mph (64.13 km/h) |
| 45 mph (72.42 km/h) | 44.83 mph (72.15 km/h) |
| 50 mph (80.47 km/h) | 49.81 mph (80.16 km/h) |
| 55 mph (88.51 km/h) | 54.79 mph (88.18 km/h) |
| 60 mph (96.56 km/h) | 59.77 mph (96.2 km/h) |
| 65 mph (104.61 km/h) | 64.75 mph (104.21 km/h) |
| 70 mph (112.65 km/h) | 69.74 mph (112.23 km/h) |
| 75 mph (120.7 km/h) | 74.72 mph (120.24 km/h) |
| 80 mph (128.75 km/h) | 79.7 mph (128.26 km/h) |
| 85 mph (136.79 km/h) | 84.68 mph (136.28 km/h) |
| 90 mph (144.84 km/h) | 89.66 mph (144.29 km/h) |
| 95 mph (152.89 km/h) | 94.64 mph (152.31 km/h) |
| 100 mph (160.93 km/h) | 99.62 mph (160.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 2302 | 2479 | 2588 | 2706 | 2791 | 2883 | 2993 | 3145 | 3296 | 3465 | 3600 | 3844 | 4114 | 4325 | 4460 | 4536 | 4814 | 5202 | 6045 |
Better Fuel Economy Factory Ratios Increased Power
