Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/30-20 | 220/20-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.31 (643) | 23.46 (596) | -1.85 (-47) -7.3% |
| Width inches (mm) | 8.86 (225) | 8.66 (220) | -0.2 (-5) -2.2% |
| Circum. inches (mm) | 79.53 (2020.04) | 73.72 (1872.39) | -5.81 (-147.65) -7.3% |
| Sidewall Height inches (mm) | 2.66 (67.5) | 1.73 (44) | -0.93 (-23.5) -34.8% |
| Revolutions per mile (km) | 796.69 (495.04) | 859.51 (534.08) | 62.83 (39.04) 7.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.54 mph (29.83 km/h) |
| 25 mph (40.23 km/h) | 23.17 mph (37.29 km/h) |
| 30 mph (48.28 km/h) | 27.81 mph (44.75 km/h) |
| 35 mph (56.33 km/h) | 32.44 mph (52.21 km/h) |
| 40 mph (64.37 km/h) | 37.08 mph (59.67 km/h) |
| 45 mph (72.42 km/h) | 41.71 mph (67.13 km/h) |
| 50 mph (80.47 km/h) | 46.35 mph (74.59 km/h) |
| 55 mph (88.51 km/h) | 50.98 mph (82.04 km/h) |
| 60 mph (96.56 km/h) | 55.61 mph (89.5 km/h) |
| 65 mph (104.61 km/h) | 60.25 mph (96.96 km/h) |
| 70 mph (112.65 km/h) | 64.88 mph (104.42 km/h) |
| 75 mph (120.7 km/h) | 69.52 mph (111.88 km/h) |
| 80 mph (128.75 km/h) | 74.15 mph (119.34 km/h) |
| 85 mph (136.79 km/h) | 78.79 mph (126.8 km/h) |
| 90 mph (144.84 km/h) | 83.42 mph (134.25 km/h) |
| 95 mph (152.89 km/h) | 88.06 mph (141.71 km/h) |
| 100 mph (160.93 km/h) | 92.69 mph (149.17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2187 | 2541 | 2736 | 2857 | 2988 | 3081 | 3183 | 3304 | 3472 | 3639 | 3825 | 3974 | 4244 | 4542 | 4775 | 4924 | 5008 | 5315 | 5743 | 6674 |
Better Fuel Economy Factory Ratios Increased Power
