Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/30-20 | 205/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.31 (643) | 27.26 (692.5) | 1.95 (49.5) 7.7% |
| Width inches (mm) | 8.86 (225) | 8.07 (205) | -0.79 (-20) -8.9% |
| Circum. inches (mm) | 79.53 (2020.04) | 85.65 (2175.55) | 6.12 (155.51) 7.7% |
| Sidewall Height inches (mm) | 2.66 (67.5) | 3.63 (92.25) | 0.97 (24.75) 36.7% |
| Revolutions per mile (km) | 796.69 (495.04) | 739.74 (459.65) | -56.95 (-35.39) -7.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.54 mph (34.66 km/h) |
| 25 mph (40.23 km/h) | 26.92 mph (43.33 km/h) |
| 30 mph (48.28 km/h) | 32.31 mph (52 km/h) |
| 35 mph (56.33 km/h) | 37.69 mph (60.66 km/h) |
| 40 mph (64.37 km/h) | 43.08 mph (69.33 km/h) |
| 45 mph (72.42 km/h) | 48.46 mph (78 km/h) |
| 50 mph (80.47 km/h) | 53.85 mph (86.66 km/h) |
| 55 mph (88.51 km/h) | 59.23 mph (95.33 km/h) |
| 60 mph (96.56 km/h) | 64.62 mph (103.99 km/h) |
| 65 mph (104.61 km/h) | 70 mph (112.66 km/h) |
| 70 mph (112.65 km/h) | 75.39 mph (121.33 km/h) |
| 75 mph (120.7 km/h) | 80.77 mph (129.99 km/h) |
| 80 mph (128.75 km/h) | 86.16 mph (138.66 km/h) |
| 85 mph (136.79 km/h) | 91.54 mph (147.33 km/h) |
| 90 mph (144.84 km/h) | 96.93 mph (155.99 km/h) |
| 95 mph (152.89 km/h) | 102.31 mph (164.66 km/h) |
| 100 mph (160.93 km/h) | 107.7 mph (173.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1882 | 2187 | 2355 | 2459 | 2571 | 2652 | 2740 | 2844 | 2988 | 3132 | 3292 | 3421 | 3653 | 3909 | 4109 | 4238 | 4310 | 4574 | 4943 | 5744 |
Better Fuel Economy Factory Ratios Increased Power
