Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/30-20 | 225/20-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.31 (643) | 23.54 (598) | -1.77 (-45) -7% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 79.53 (2020.04) | 73.96 (1878.67) | -5.57 (-141.37) -7% |
| Sidewall Height inches (mm) | 2.66 (67.5) | 1.77 (45) | -0.89 (-22.5) -33.3% |
| Revolutions per mile (km) | 796.69 (495.04) | 856.64 (532.29) | 59.95 (37.25) 7.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.6 mph (29.93 km/h) |
| 25 mph (40.23 km/h) | 23.25 mph (37.42 km/h) |
| 30 mph (48.28 km/h) | 27.9 mph (44.9 km/h) |
| 35 mph (56.33 km/h) | 32.55 mph (52.39 km/h) |
| 40 mph (64.37 km/h) | 37.2 mph (59.87 km/h) |
| 45 mph (72.42 km/h) | 41.85 mph (67.35 km/h) |
| 50 mph (80.47 km/h) | 46.5 mph (74.84 km/h) |
| 55 mph (88.51 km/h) | 51.15 mph (82.32 km/h) |
| 60 mph (96.56 km/h) | 55.8 mph (89.8 km/h) |
| 65 mph (104.61 km/h) | 60.45 mph (97.29 km/h) |
| 70 mph (112.65 km/h) | 65.1 mph (104.77 km/h) |
| 75 mph (120.7 km/h) | 69.75 mph (112.25 km/h) |
| 80 mph (128.75 km/h) | 74.4 mph (119.74 km/h) |
| 85 mph (136.79 km/h) | 79.05 mph (127.22 km/h) |
| 90 mph (144.84 km/h) | 83.7 mph (134.7 km/h) |
| 95 mph (152.89 km/h) | 88.35 mph (142.19 km/h) |
| 100 mph (160.93 km/h) | 93 mph (149.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2180 | 2532 | 2727 | 2848 | 2978 | 3071 | 3173 | 3293 | 3460 | 3627 | 3813 | 3961 | 4230 | 4527 | 4759 | 4907 | 4991 | 5297 | 5724 | 6651 |
Better Fuel Economy Factory Ratios Increased Power
