Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 37/16-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 36.94 (938.36) | -9.49 (-241.14) -20.4% |
| Width inches (mm) | 15.55 (395) | 15.98 (406) | 0.43 (11) 2.8% |
| Circum. inches (mm) | 145.89 (3705.51) | 116.06 (2947.94) | -29.83 (-757.56) -20.4% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 8.47 (215.18) | -4.75 (-120.57) -35.9% |
| Revolutions per mile (km) | 434.31 (269.87) | 545.92 (339.22) | 111.61 (69.35) 25.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 15.91 mph (25.61 km/h) |
| 25 mph (40.23 km/h) | 19.89 mph (32.01 km/h) |
| 30 mph (48.28 km/h) | 23.87 mph (38.41 km/h) |
| 35 mph (56.33 km/h) | 27.84 mph (44.81 km/h) |
| 40 mph (64.37 km/h) | 31.82 mph (51.21 km/h) |
| 45 mph (72.42 km/h) | 35.8 mph (57.61 km/h) |
| 50 mph (80.47 km/h) | 39.78 mph (64.02 km/h) |
| 55 mph (88.51 km/h) | 43.76 mph (70.42 km/h) |
| 60 mph (96.56 km/h) | 47.73 mph (76.82 km/h) |
| 65 mph (104.61 km/h) | 51.71 mph (83.22 km/h) |
| 70 mph (112.65 km/h) | 55.69 mph (89.62 km/h) |
| 75 mph (120.7 km/h) | 59.67 mph (96.02 km/h) |
| 80 mph (128.75 km/h) | 63.64 mph (102.43 km/h) |
| 85 mph (136.79 km/h) | 67.62 mph (108.83 km/h) |
| 90 mph (144.84 km/h) | 71.6 mph (115.23 km/h) |
| 95 mph (152.89 km/h) | 75.58 mph (121.63 km/h) |
| 100 mph (160.93 km/h) | 79.56 mph (128.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1389 | 1614 | 1738 | 1815 | 1898 | 1957 | 2022 | 2099 | 2205 | 2311 | 2430 | 2524 | 2696 | 2885 | 3033 | 3127 | 3181 | 3376 | 3648 | 4239 |
Better Fuel Economy Factory Ratios Increased Power
