Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 385/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 45.77 (1162.5) | -0.67 (-17) -1.4% |
| Width inches (mm) | 15.55 (395) | 15.16 (385) | -0.39 (-10) -2.5% |
| Circum. inches (mm) | 145.89 (3705.51) | 143.78 (3652.1) | -2.1 (-53.41) -1.4% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 12.88 (327.25) | -0.33 (-8.5) -2.5% |
| Revolutions per mile (km) | 434.31 (269.87) | 440.66 (273.81) | 6.35 (3.95) 1.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.71 mph (31.72 km/h) |
| 25 mph (40.23 km/h) | 24.64 mph (39.65 km/h) |
| 30 mph (48.28 km/h) | 29.57 mph (47.58 km/h) |
| 35 mph (56.33 km/h) | 34.5 mph (55.52 km/h) |
| 40 mph (64.37 km/h) | 39.42 mph (63.45 km/h) |
| 45 mph (72.42 km/h) | 44.35 mph (71.38 km/h) |
| 50 mph (80.47 km/h) | 49.28 mph (79.31 km/h) |
| 55 mph (88.51 km/h) | 54.21 mph (87.24 km/h) |
| 60 mph (96.56 km/h) | 59.14 mph (95.17 km/h) |
| 65 mph (104.61 km/h) | 64.06 mph (103.1 km/h) |
| 70 mph (112.65 km/h) | 68.99 mph (111.03 km/h) |
| 75 mph (120.7 km/h) | 73.92 mph (118.96 km/h) |
| 80 mph (128.75 km/h) | 78.85 mph (126.89 km/h) |
| 85 mph (136.79 km/h) | 83.77 mph (134.82 km/h) |
| 90 mph (144.84 km/h) | 88.7 mph (142.75 km/h) |
| 95 mph (152.89 km/h) | 93.63 mph (150.68 km/h) |
| 100 mph (160.93 km/h) | 98.56 mph (158.62 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
