Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 425/65-22.5 | 445/55-22.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 44.25 (1124) | 41.77 (1061) | -2.48 (-63) -5.6% |
| Width inches (mm) | 16.73 (425) | 17.52 (445) | 0.79 (20) 4.7% |
| Circum. inches (mm) | 139.02 (3531.15) | 131.23 (3333.23) | -7.79 (-197.92) -5.6% |
| Sidewall Height inches (mm) | 10.88 (276.25) | 9.64 (244.75) | -1.24 (-31.5) -11.4% |
| Revolutions per mile (km) | 455.76 (283.19) | 482.82 (300.01) | 27.06 (16.82) 5.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.88 mph (30.38 km/h) |
| 25 mph (40.23 km/h) | 23.6 mph (37.98 km/h) |
| 30 mph (48.28 km/h) | 28.32 mph (45.57 km/h) |
| 35 mph (56.33 km/h) | 33.04 mph (53.17 km/h) |
| 40 mph (64.37 km/h) | 37.76 mph (60.77 km/h) |
| 45 mph (72.42 km/h) | 42.48 mph (68.36 km/h) |
| 50 mph (80.47 km/h) | 47.2 mph (75.96 km/h) |
| 55 mph (88.51 km/h) | 51.92 mph (83.55 km/h) |
| 60 mph (96.56 km/h) | 56.64 mph (91.15 km/h) |
| 65 mph (104.61 km/h) | 61.36 mph (98.74 km/h) |
| 70 mph (112.65 km/h) | 66.08 mph (106.34 km/h) |
| 75 mph (120.7 km/h) | 70.8 mph (113.94 km/h) |
| 80 mph (128.75 km/h) | 75.52 mph (121.53 km/h) |
| 85 mph (136.79 km/h) | 80.24 mph (129.13 km/h) |
| 90 mph (144.84 km/h) | 84.96 mph (136.72 km/h) |
| 95 mph (152.89 km/h) | 89.68 mph (144.32 km/h) |
| 100 mph (160.93 km/h) | 94.4 mph (151.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1229 | 1427 | 1537 | 1605 | 1678 | 1731 | 1788 | 1856 | 1950 | 2044 | 2149 | 2233 | 2384 | 2551 | 2682 | 2766 | 2813 | 2985 | 3226 | 3749 |
Better Fuel Economy Factory Ratios Increased Power
