Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/80-20 | 425/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 42.99 (1092) | 45.1 (1145.5) | 2.11 (53.5) 4.9% |
| Width inches (mm) | 14.37 (365) | 16.73 (425) | 2.36 (60) 16.4% |
| Circum. inches (mm) | 135.06 (3430.62) | 141.68 (3598.69) | 6.62 (168.08) 4.9% |
| Sidewall Height inches (mm) | 11.5 (292) | 12.55 (318.75) | 1.05 (26.75) 9.2% |
| Revolutions per mile (km) | 469.11 (291.49) | 447.2 (277.88) | -21.91 (-13.61) -4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.98 mph (33.76 km/h) |
| 25 mph (40.23 km/h) | 26.22 mph (42.2 km/h) |
| 30 mph (48.28 km/h) | 31.47 mph (50.65 km/h) |
| 35 mph (56.33 km/h) | 36.71 mph (59.09 km/h) |
| 40 mph (64.37 km/h) | 41.96 mph (67.53 km/h) |
| 45 mph (72.42 km/h) | 47.2 mph (75.97 km/h) |
| 50 mph (80.47 km/h) | 52.45 mph (84.41 km/h) |
| 55 mph (88.51 km/h) | 57.69 mph (92.85 km/h) |
| 60 mph (96.56 km/h) | 62.94 mph (101.29 km/h) |
| 65 mph (104.61 km/h) | 68.18 mph (109.73 km/h) |
| 70 mph (112.65 km/h) | 73.43 mph (118.17 km/h) |
| 75 mph (120.7 km/h) | 78.67 mph (126.61 km/h) |
| 80 mph (128.75 km/h) | 83.92 mph (135.06 km/h) |
| 85 mph (136.79 km/h) | 89.16 mph (143.5 km/h) |
| 90 mph (144.84 km/h) | 94.41 mph (151.94 km/h) |
| 95 mph (152.89 km/h) | 99.65 mph (160.38 km/h) |
| 100 mph (160.93 km/h) | 104.9 mph (168.82 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
