Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/80-20 | 405/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 42.99 (1092) | 47.11 (1196.5) | 4.11 (104.5) 9.6% |
| Width inches (mm) | 14.37 (365) | 15.94 (405) | 1.57 (40) 11% |
| Circum. inches (mm) | 135.06 (3430.62) | 147.99 (3758.92) | 12.93 (328.3) 9.6% |
| Sidewall Height inches (mm) | 11.5 (292) | 13.55 (344.25) | 2.06 (52.25) 17.9% |
| Revolutions per mile (km) | 469.11 (291.49) | 428.14 (266.03) | -40.97 (-25.46) -8.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.91 mph (35.27 km/h) |
| 25 mph (40.23 km/h) | 27.39 mph (44.08 km/h) |
| 30 mph (48.28 km/h) | 32.87 mph (52.9 km/h) |
| 35 mph (56.33 km/h) | 38.35 mph (61.72 km/h) |
| 40 mph (64.37 km/h) | 43.83 mph (70.53 km/h) |
| 45 mph (72.42 km/h) | 49.31 mph (79.35 km/h) |
| 50 mph (80.47 km/h) | 54.78 mph (88.17 km/h) |
| 55 mph (88.51 km/h) | 60.26 mph (96.98 km/h) |
| 60 mph (96.56 km/h) | 65.74 mph (105.8 km/h) |
| 65 mph (104.61 km/h) | 71.22 mph (114.62 km/h) |
| 70 mph (112.65 km/h) | 76.7 mph (123.43 km/h) |
| 75 mph (120.7 km/h) | 82.18 mph (132.25 km/h) |
| 80 mph (128.75 km/h) | 87.66 mph (141.07 km/h) |
| 85 mph (136.79 km/h) | 93.13 mph (149.89 km/h) |
| 90 mph (144.84 km/h) | 98.61 mph (158.7 km/h) |
| 95 mph (152.89 km/h) | 104.09 mph (167.52 km/h) |
| 100 mph (160.93 km/h) | 109.57 mph (176.34 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
