Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 385/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 38.19 (970) | 0.2 (4.96) 0.5% |
| Width inches (mm) | 15.51 (394) | 15.16 (385) | -0.35 (-9) -2.3% |
| Circum. inches (mm) | 119.36 (3031.76) | 119.97 (3047.34) | 0.61 (15.58) 0.5% |
| Sidewall Height inches (mm) | 9 (228.52) | 9.09 (231) | 0.1 (2.48) 1.1% |
| Revolutions per mile (km) | 530.83 (329.84) | 528.11 (328.15) | -2.71 (-1.69) -0.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.1 mph (32.35 km/h) |
| 25 mph (40.23 km/h) | 25.13 mph (40.44 km/h) |
| 30 mph (48.28 km/h) | 30.15 mph (48.53 km/h) |
| 35 mph (56.33 km/h) | 35.18 mph (56.62 km/h) |
| 40 mph (64.37 km/h) | 40.21 mph (64.7 km/h) |
| 45 mph (72.42 km/h) | 45.23 mph (72.79 km/h) |
| 50 mph (80.47 km/h) | 50.26 mph (80.88 km/h) |
| 55 mph (88.51 km/h) | 55.28 mph (88.97 km/h) |
| 60 mph (96.56 km/h) | 60.31 mph (97.06 km/h) |
| 65 mph (104.61 km/h) | 65.33 mph (105.15 km/h) |
| 70 mph (112.65 km/h) | 70.36 mph (113.23 km/h) |
| 75 mph (120.7 km/h) | 75.39 mph (121.32 km/h) |
| 80 mph (128.75 km/h) | 80.41 mph (129.41 km/h) |
| 85 mph (136.79 km/h) | 85.44 mph (137.5 km/h) |
| 90 mph (144.84 km/h) | 90.46 mph (145.59 km/h) |
| 95 mph (152.89 km/h) | 95.49 mph (153.67 km/h) |
| 100 mph (160.93 km/h) | 100.51 mph (161.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1344 | 1561 | 1681 | 1756 | 1836 | 1893 | 1956 | 2030 | 2133 | 2236 | 2350 | 2442 | 2608 | 2791 | 2934 | 3025 | 3077 | 3266 | 3529 | 4100 |
Better Fuel Economy Factory Ratios Increased Power
