Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 375/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 43.62 (1108) | -2.81 (-71.5) -6.1% |
| Width inches (mm) | 15.55 (395) | 14.76 (375) | -0.79 (-20) -5.1% |
| Circum. inches (mm) | 145.89 (3705.51) | 137.04 (3480.88) | -8.84 (-224.62) -6.1% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 11.81 (300) | -1.41 (-35.75) -10.6% |
| Revolutions per mile (km) | 434.31 (269.87) | 462.34 (287.28) | 28.03 (17.41) 6.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.79 mph (30.24 km/h) |
| 25 mph (40.23 km/h) | 23.48 mph (37.79 km/h) |
| 30 mph (48.28 km/h) | 28.18 mph (45.35 km/h) |
| 35 mph (56.33 km/h) | 32.88 mph (52.91 km/h) |
| 40 mph (64.37 km/h) | 37.58 mph (60.47 km/h) |
| 45 mph (72.42 km/h) | 42.27 mph (68.03 km/h) |
| 50 mph (80.47 km/h) | 46.97 mph (75.59 km/h) |
| 55 mph (88.51 km/h) | 51.67 mph (83.15 km/h) |
| 60 mph (96.56 km/h) | 56.36 mph (90.71 km/h) |
| 65 mph (104.61 km/h) | 61.06 mph (98.27 km/h) |
| 70 mph (112.65 km/h) | 65.76 mph (105.83 km/h) |
| 75 mph (120.7 km/h) | 70.45 mph (113.38 km/h) |
| 80 mph (128.75 km/h) | 75.15 mph (120.94 km/h) |
| 85 mph (136.79 km/h) | 79.85 mph (128.5 km/h) |
| 90 mph (144.84 km/h) | 84.54 mph (136.06 km/h) |
| 95 mph (152.89 km/h) | 89.24 mph (143.62 km/h) |
| 100 mph (160.93 km/h) | 93.94 mph (151.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1177 | 1367 | 1472 | 1537 | 1607 | 1657 | 1712 | 1777 | 1867 | 1958 | 2058 | 2138 | 2283 | 2443 | 2568 | 2649 | 2694 | 2859 | 3089 | 3590 |
Better Fuel Economy Factory Ratios Increased Power
