Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 445/65-22.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 45.28 (1150) | -1.16 (-29.5) -2.5% |
| Width inches (mm) | 15.55 (395) | 17.52 (445) | 1.97 (50) 12.7% |
| Circum. inches (mm) | 145.89 (3705.51) | 142.24 (3612.83) | -3.65 (-92.68) -2.5% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 11.39 (289.25) | -1.83 (-46.5) -13.8% |
| Revolutions per mile (km) | 434.31 (269.87) | 445.45 (276.79) | 11.14 (6.92) 2.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.5 mph (31.38 km/h) |
| 25 mph (40.23 km/h) | 24.37 mph (39.23 km/h) |
| 30 mph (48.28 km/h) | 29.25 mph (47.07 km/h) |
| 35 mph (56.33 km/h) | 34.12 mph (54.92 km/h) |
| 40 mph (64.37 km/h) | 39 mph (62.76 km/h) |
| 45 mph (72.42 km/h) | 43.87 mph (70.61 km/h) |
| 50 mph (80.47 km/h) | 48.75 mph (78.45 km/h) |
| 55 mph (88.51 km/h) | 53.62 mph (86.3 km/h) |
| 60 mph (96.56 km/h) | 58.5 mph (94.15 km/h) |
| 65 mph (104.61 km/h) | 63.37 mph (101.99 km/h) |
| 70 mph (112.65 km/h) | 68.25 mph (109.84 km/h) |
| 75 mph (120.7 km/h) | 73.12 mph (117.68 km/h) |
| 80 mph (128.75 km/h) | 78 mph (125.53 km/h) |
| 85 mph (136.79 km/h) | 82.87 mph (133.37 km/h) |
| 90 mph (144.84 km/h) | 87.75 mph (141.22 km/h) |
| 95 mph (152.89 km/h) | 92.62 mph (149.06 km/h) |
| 100 mph (160.93 km/h) | 97.5 mph (156.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
