Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 395/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 38.66 (982) | 0.67 (16.96) 1.8% |
| Width inches (mm) | 15.51 (394) | 15.55 (395) | 0.04 (1) 0.3% |
| Circum. inches (mm) | 119.36 (3031.76) | 121.46 (3085.04) | 2.1 (53.28) 1.8% |
| Sidewall Height inches (mm) | 9 (228.52) | 9.33 (237) | 0.33 (8.48) 3.7% |
| Revolutions per mile (km) | 530.83 (329.84) | 521.66 (324.14) | -9.17 (-5.7) -1.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.35 mph (32.75 km/h) |
| 25 mph (40.23 km/h) | 25.44 mph (40.94 km/h) |
| 30 mph (48.28 km/h) | 30.53 mph (49.13 km/h) |
| 35 mph (56.33 km/h) | 35.62 mph (57.32 km/h) |
| 40 mph (64.37 km/h) | 40.7 mph (65.51 km/h) |
| 45 mph (72.42 km/h) | 45.79 mph (73.69 km/h) |
| 50 mph (80.47 km/h) | 50.88 mph (81.88 km/h) |
| 55 mph (88.51 km/h) | 55.97 mph (90.07 km/h) |
| 60 mph (96.56 km/h) | 61.05 mph (98.26 km/h) |
| 65 mph (104.61 km/h) | 66.14 mph (106.45 km/h) |
| 70 mph (112.65 km/h) | 71.23 mph (114.63 km/h) |
| 75 mph (120.7 km/h) | 76.32 mph (122.82 km/h) |
| 80 mph (128.75 km/h) | 81.41 mph (131.01 km/h) |
| 85 mph (136.79 km/h) | 86.49 mph (139.2 km/h) |
| 90 mph (144.84 km/h) | 91.58 mph (147.39 km/h) |
| 95 mph (152.89 km/h) | 96.67 mph (155.57 km/h) |
| 100 mph (160.93 km/h) | 101.76 mph (163.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1328 | 1542 | 1661 | 1734 | 1813 | 1870 | 1932 | 2005 | 2107 | 2209 | 2322 | 2412 | 2576 | 2757 | 2898 | 2988 | 3039 | 3226 | 3485 | 4050 |
Better Fuel Economy Factory Ratios Increased Power
