Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 375/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 40.67 (1033) | -5.77 (-146.5) -12.4% |
| Width inches (mm) | 15.55 (395) | 14.76 (375) | -0.79 (-20) -5.1% |
| Circum. inches (mm) | 145.89 (3705.51) | 127.77 (3245.27) | -18.12 (-460.24) -12.4% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 10.33 (262.5) | -2.88 (-73.25) -21.8% |
| Revolutions per mile (km) | 434.31 (269.87) | 495.91 (308.14) | 61.59 (38.27) 14.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.52 mph (28.19 km/h) |
| 25 mph (40.23 km/h) | 21.89 mph (35.24 km/h) |
| 30 mph (48.28 km/h) | 26.27 mph (42.28 km/h) |
| 35 mph (56.33 km/h) | 30.65 mph (49.33 km/h) |
| 40 mph (64.37 km/h) | 35.03 mph (56.38 km/h) |
| 45 mph (72.42 km/h) | 39.41 mph (63.43 km/h) |
| 50 mph (80.47 km/h) | 43.79 mph (70.47 km/h) |
| 55 mph (88.51 km/h) | 48.17 mph (77.52 km/h) |
| 60 mph (96.56 km/h) | 52.55 mph (84.57 km/h) |
| 65 mph (104.61 km/h) | 56.93 mph (91.61 km/h) |
| 70 mph (112.65 km/h) | 61.31 mph (98.66 km/h) |
| 75 mph (120.7 km/h) | 65.68 mph (105.71 km/h) |
| 80 mph (128.75 km/h) | 70.06 mph (112.76 km/h) |
| 85 mph (136.79 km/h) | 74.44 mph (119.8 km/h) |
| 90 mph (144.84 km/h) | 78.82 mph (126.85 km/h) |
| 95 mph (152.89 km/h) | 83.2 mph (133.9 km/h) |
| 100 mph (160.93 km/h) | 87.58 mph (140.95 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1262 | 1466 | 1579 | 1649 | 1724 | 1778 | 1837 | 1906 | 2003 | 2100 | 2207 | 2293 | 2449 | 2621 | 2755 | 2841 | 2889 | 3066 | 3313 | 3850 |
Better Fuel Economy Factory Ratios Increased Power
