Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 395/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 44.88 (1140) | -1.56 (-39.5) -3.3% |
| Width inches (mm) | 15.55 (395) | 15.55 (395) | 0 (0) 0% |
| Circum. inches (mm) | 145.89 (3705.51) | 141 (3581.42) | -4.89 (-124.09) -3.3% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 12.44 (316) | -0.78 (-19.75) -5.9% |
| Revolutions per mile (km) | 434.31 (269.87) | 449.36 (279.22) | 15.05 (9.35) 3.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.33 mph (31.11 km/h) |
| 25 mph (40.23 km/h) | 24.16 mph (38.89 km/h) |
| 30 mph (48.28 km/h) | 29 mph (46.66 km/h) |
| 35 mph (56.33 km/h) | 33.83 mph (54.44 km/h) |
| 40 mph (64.37 km/h) | 38.66 mph (62.22 km/h) |
| 45 mph (72.42 km/h) | 43.49 mph (70 km/h) |
| 50 mph (80.47 km/h) | 48.33 mph (77.77 km/h) |
| 55 mph (88.51 km/h) | 53.16 mph (85.55 km/h) |
| 60 mph (96.56 km/h) | 57.99 mph (93.33 km/h) |
| 65 mph (104.61 km/h) | 62.82 mph (101.1 km/h) |
| 70 mph (112.65 km/h) | 67.66 mph (108.88 km/h) |
| 75 mph (120.7 km/h) | 72.49 mph (116.66 km/h) |
| 80 mph (128.75 km/h) | 77.32 mph (124.44 km/h) |
| 85 mph (136.79 km/h) | 82.15 mph (132.21 km/h) |
| 90 mph (144.84 km/h) | 86.99 mph (139.99 km/h) |
| 95 mph (152.89 km/h) | 91.82 mph (147.77 km/h) |
| 100 mph (160.93 km/h) | 96.65 mph (155.55 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
