Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/80-20 | 405/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 42.99 (1092) | 45.51 (1156) | 2.52 (64) 5.9% |
| Width inches (mm) | 14.37 (365) | 15.94 (405) | 1.57 (40) 11% |
| Circum. inches (mm) | 135.06 (3430.62) | 142.98 (3631.68) | 7.92 (201.06) 5.9% |
| Sidewall Height inches (mm) | 11.5 (292) | 12.76 (324) | 1.26 (32) 11% |
| Revolutions per mile (km) | 469.11 (291.49) | 443.14 (275.35) | -25.97 (-16.14) -5.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.17 mph (34.07 km/h) |
| 25 mph (40.23 km/h) | 26.47 mph (42.59 km/h) |
| 30 mph (48.28 km/h) | 31.76 mph (51.11 km/h) |
| 35 mph (56.33 km/h) | 37.05 mph (59.63 km/h) |
| 40 mph (64.37 km/h) | 42.34 mph (68.15 km/h) |
| 45 mph (72.42 km/h) | 47.64 mph (76.67 km/h) |
| 50 mph (80.47 km/h) | 52.93 mph (85.18 km/h) |
| 55 mph (88.51 km/h) | 58.22 mph (93.7 km/h) |
| 60 mph (96.56 km/h) | 63.52 mph (102.22 km/h) |
| 65 mph (104.61 km/h) | 68.81 mph (110.74 km/h) |
| 70 mph (112.65 km/h) | 74.1 mph (119.26 km/h) |
| 75 mph (120.7 km/h) | 79.4 mph (127.78 km/h) |
| 80 mph (128.75 km/h) | 84.69 mph (136.29 km/h) |
| 85 mph (136.79 km/h) | 89.98 mph (144.81 km/h) |
| 90 mph (144.84 km/h) | 95.27 mph (153.33 km/h) |
| 95 mph (152.89 km/h) | 100.57 mph (161.85 km/h) |
| 100 mph (160.93 km/h) | 105.86 mph (170.37 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
