Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/80-20 | 385/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 42.99 (1092) | 44.25 (1124) | 1.26 (32) 2.9% |
| Width inches (mm) | 14.37 (365) | 15.16 (385) | 0.79 (20) 5.5% |
| Circum. inches (mm) | 135.06 (3430.62) | 139.02 (3531.15) | 3.96 (100.53) 2.9% |
| Sidewall Height inches (mm) | 11.5 (292) | 12.13 (308) | 0.63 (16) 5.5% |
| Revolutions per mile (km) | 469.11 (291.49) | 455.76 (283.19) | -13.36 (-8.3) -2.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.59 mph (33.13 km/h) |
| 25 mph (40.23 km/h) | 25.73 mph (41.41 km/h) |
| 30 mph (48.28 km/h) | 30.88 mph (49.7 km/h) |
| 35 mph (56.33 km/h) | 36.03 mph (57.98 km/h) |
| 40 mph (64.37 km/h) | 41.17 mph (66.26 km/h) |
| 45 mph (72.42 km/h) | 46.32 mph (74.54 km/h) |
| 50 mph (80.47 km/h) | 51.47 mph (82.83 km/h) |
| 55 mph (88.51 km/h) | 56.61 mph (91.11 km/h) |
| 60 mph (96.56 km/h) | 61.76 mph (99.39 km/h) |
| 65 mph (104.61 km/h) | 66.9 mph (107.67 km/h) |
| 70 mph (112.65 km/h) | 72.05 mph (115.96 km/h) |
| 75 mph (120.7 km/h) | 77.2 mph (124.24 km/h) |
| 80 mph (128.75 km/h) | 82.34 mph (132.52 km/h) |
| 85 mph (136.79 km/h) | 87.49 mph (140.8 km/h) |
| 90 mph (144.84 km/h) | 92.64 mph (149.09 km/h) |
| 95 mph (152.89 km/h) | 97.78 mph (157.37 km/h) |
| 100 mph (160.93 km/h) | 102.93 mph (165.65 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
