Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 395/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 40.22 (1021.5) | -6.22 (-158) -13.4% |
| Width inches (mm) | 15.55 (395) | 15.55 (395) | 0 (0) 0% |
| Circum. inches (mm) | 145.89 (3705.51) | 126.34 (3209.14) | -19.54 (-496.37) -13.4% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 10.11 (256.75) | -3.11 (-79) -23.5% |
| Revolutions per mile (km) | 434.31 (269.87) | 501.49 (311.61) | 67.18 (41.74) 15.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.32 mph (27.88 km/h) |
| 25 mph (40.23 km/h) | 21.65 mph (34.84 km/h) |
| 30 mph (48.28 km/h) | 25.98 mph (41.81 km/h) |
| 35 mph (56.33 km/h) | 30.31 mph (48.78 km/h) |
| 40 mph (64.37 km/h) | 34.64 mph (55.75 km/h) |
| 45 mph (72.42 km/h) | 38.97 mph (62.72 km/h) |
| 50 mph (80.47 km/h) | 43.3 mph (69.69 km/h) |
| 55 mph (88.51 km/h) | 47.63 mph (76.66 km/h) |
| 60 mph (96.56 km/h) | 51.96 mph (83.63 km/h) |
| 65 mph (104.61 km/h) | 56.29 mph (90.59 km/h) |
| 70 mph (112.65 km/h) | 60.62 mph (97.56 km/h) |
| 75 mph (120.7 km/h) | 64.95 mph (104.53 km/h) |
| 80 mph (128.75 km/h) | 69.28 mph (111.5 km/h) |
| 85 mph (136.79 km/h) | 73.61 mph (118.47 km/h) |
| 90 mph (144.84 km/h) | 77.94 mph (125.44 km/h) |
| 95 mph (152.89 km/h) | 82.27 mph (132.41 km/h) |
| 100 mph (160.93 km/h) | 86.6 mph (139.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1276 | 1483 | 1597 | 1667 | 1743 | 1798 | 1857 | 1928 | 2026 | 2123 | 2232 | 2319 | 2476 | 2650 | 2786 | 2873 | 2922 | 3101 | 3351 | 3894 |
Better Fuel Economy Factory Ratios Increased Power
