Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/25-20 | 305/20-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26 (660.5) | 24.8 (630) | -1.2 (-30.5) -4.6% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 81.69 (2075.02) | 77.92 (1979.2) | -3.77 (-95.82) -4.6% |
| Sidewall Height inches (mm) | 3 (76.25) | 2.4 (61) | -0.6 (-15.25) -20% |
| Revolutions per mile (km) | 775.58 (481.92) | 813.13 (505.25) | 37.55 (23.33) 4.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.08 mph (30.7 km/h) |
| 25 mph (40.23 km/h) | 23.85 mph (38.38 km/h) |
| 30 mph (48.28 km/h) | 28.61 mph (46.05 km/h) |
| 35 mph (56.33 km/h) | 33.38 mph (53.73 km/h) |
| 40 mph (64.37 km/h) | 38.15 mph (61.4 km/h) |
| 45 mph (72.42 km/h) | 42.92 mph (69.08 km/h) |
| 50 mph (80.47 km/h) | 47.69 mph (76.75 km/h) |
| 55 mph (88.51 km/h) | 52.46 mph (84.43 km/h) |
| 60 mph (96.56 km/h) | 57.23 mph (92.1 km/h) |
| 65 mph (104.61 km/h) | 62 mph (99.78 km/h) |
| 70 mph (112.65 km/h) | 66.77 mph (107.45 km/h) |
| 75 mph (120.7 km/h) | 71.54 mph (115.13 km/h) |
| 80 mph (128.75 km/h) | 76.31 mph (122.8 km/h) |
| 85 mph (136.79 km/h) | 81.07 mph (130.48 km/h) |
| 90 mph (144.84 km/h) | 85.84 mph (138.15 km/h) |
| 95 mph (152.89 km/h) | 90.61 mph (145.83 km/h) |
| 100 mph (160.93 km/h) | 95.38 mph (153.5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2069 | 2404 | 2589 | 2703 | 2827 | 2915 | 3011 | 3126 | 3284 | 3443 | 3619 | 3760 | 4015 | 4297 | 4517 | 4658 | 4737 | 5028 | 5433 | 6313 |
Better Fuel Economy Factory Ratios Increased Power
