Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 445/55-19.5 | 385/65-22.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.77 (984.8) | 42.2 (1072) | 3.43 (87.2) 8.9% |
| Width inches (mm) | 17.52 (445) | 15.16 (385) | -2.36 (-60) -13.5% |
| Circum. inches (mm) | 121.8 (3093.84) | 132.59 (3367.79) | 10.79 (273.95) 8.9% |
| Sidewall Height inches (mm) | 9.64 (244.75) | 9.85 (250.25) | 0.22 (5.5) 2.2% |
| Revolutions per mile (km) | 520.18 (323.22) | 477.86 (296.93) | -42.31 (-26.29) -8.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.77 mph (35.04 km/h) |
| 25 mph (40.23 km/h) | 27.21 mph (43.8 km/h) |
| 30 mph (48.28 km/h) | 32.66 mph (52.56 km/h) |
| 35 mph (56.33 km/h) | 38.1 mph (61.31 km/h) |
| 40 mph (64.37 km/h) | 43.54 mph (70.07 km/h) |
| 45 mph (72.42 km/h) | 48.98 mph (78.83 km/h) |
| 50 mph (80.47 km/h) | 54.43 mph (87.59 km/h) |
| 55 mph (88.51 km/h) | 59.87 mph (96.35 km/h) |
| 60 mph (96.56 km/h) | 65.31 mph (105.11 km/h) |
| 65 mph (104.61 km/h) | 70.76 mph (113.87 km/h) |
| 70 mph (112.65 km/h) | 76.2 mph (122.63 km/h) |
| 75 mph (120.7 km/h) | 81.64 mph (131.39 km/h) |
| 80 mph (128.75 km/h) | 87.08 mph (140.15 km/h) |
| 85 mph (136.79 km/h) | 92.53 mph (148.91 km/h) |
| 90 mph (144.84 km/h) | 97.97 mph (157.67 km/h) |
| 95 mph (152.89 km/h) | 103.41 mph (166.43 km/h) |
| 100 mph (160.93 km/h) | 108.85 mph (175.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1216 | 1413 | 1521 | 1589 | 1661 | 1713 | 1770 | 1837 | 1930 | 2023 | 2127 | 2210 | 2360 | 2525 | 2655 | 2737 | 2784 | 2955 | 3193 | 3710 |
Better Fuel Economy Factory Ratios Increased Power
