Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 445/55-19.5 | 305/70-19.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.77 (984.8) | 36.31 (922.3) | -2.46 (-62.5) -6.3% |
| Width inches (mm) | 17.52 (445) | 12.01 (305) | -5.51 (-140) -31.5% |
| Circum. inches (mm) | 121.8 (3093.84) | 114.07 (2897.49) | -7.73 (-196.35) -6.3% |
| Sidewall Height inches (mm) | 9.64 (244.75) | 8.41 (213.5) | -1.23 (-31.25) -12.8% |
| Revolutions per mile (km) | 520.18 (323.22) | 555.43 (345.13) | 35.25 (21.9) 6.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.73 mph (30.14 km/h) |
| 25 mph (40.23 km/h) | 23.41 mph (37.68 km/h) |
| 30 mph (48.28 km/h) | 28.1 mph (45.22 km/h) |
| 35 mph (56.33 km/h) | 32.78 mph (52.75 km/h) |
| 40 mph (64.37 km/h) | 37.46 mph (60.29 km/h) |
| 45 mph (72.42 km/h) | 42.14 mph (67.82 km/h) |
| 50 mph (80.47 km/h) | 46.83 mph (75.36 km/h) |
| 55 mph (88.51 km/h) | 51.51 mph (82.9 km/h) |
| 60 mph (96.56 km/h) | 56.19 mph (90.43 km/h) |
| 65 mph (104.61 km/h) | 60.87 mph (97.97 km/h) |
| 70 mph (112.65 km/h) | 65.56 mph (105.5 km/h) |
| 75 mph (120.7 km/h) | 70.24 mph (113.04 km/h) |
| 80 mph (128.75 km/h) | 74.92 mph (120.58 km/h) |
| 85 mph (136.79 km/h) | 79.61 mph (128.11 km/h) |
| 90 mph (144.84 km/h) | 84.29 mph (135.65 km/h) |
| 95 mph (152.89 km/h) | 88.97 mph (143.18 km/h) |
| 100 mph (160.93 km/h) | 93.65 mph (150.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1413 | 1642 | 1768 | 1847 | 1931 | 1991 | 2057 | 2135 | 2243 | 2352 | 2472 | 2568 | 2743 | 2935 | 3086 | 3182 | 3236 | 3434 | 3711 | 4313 |
Better Fuel Economy Factory Ratios Increased Power
