Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 385/75-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 37.74 (958.5) | -0.26 (-6.54) -0.7% |
| Width inches (mm) | 15.51 (394) | 15.16 (385) | -0.35 (-9) -2.3% |
| Circum. inches (mm) | 119.36 (3031.76) | 118.55 (3011.22) | -0.81 (-20.55) -0.7% |
| Sidewall Height inches (mm) | 9 (228.52) | 11.37 (288.75) | 2.37 (60.23) 26.4% |
| Revolutions per mile (km) | 530.83 (329.84) | 534.45 (332.09) | 3.62 (2.25) 0.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.86 mph (31.97 km/h) |
| 25 mph (40.23 km/h) | 24.83 mph (39.96 km/h) |
| 30 mph (48.28 km/h) | 29.8 mph (47.95 km/h) |
| 35 mph (56.33 km/h) | 34.76 mph (55.95 km/h) |
| 40 mph (64.37 km/h) | 39.73 mph (63.94 km/h) |
| 45 mph (72.42 km/h) | 44.7 mph (71.93 km/h) |
| 50 mph (80.47 km/h) | 49.66 mph (79.92 km/h) |
| 55 mph (88.51 km/h) | 54.63 mph (87.91 km/h) |
| 60 mph (96.56 km/h) | 59.59 mph (95.91 km/h) |
| 65 mph (104.61 km/h) | 64.56 mph (103.9 km/h) |
| 70 mph (112.65 km/h) | 69.53 mph (111.89 km/h) |
| 75 mph (120.7 km/h) | 74.49 mph (119.88 km/h) |
| 80 mph (128.75 km/h) | 79.46 mph (127.88 km/h) |
| 85 mph (136.79 km/h) | 84.42 mph (135.87 km/h) |
| 90 mph (144.84 km/h) | 89.39 mph (143.86 km/h) |
| 95 mph (152.89 km/h) | 94.36 mph (151.85 km/h) |
| 100 mph (160.93 km/h) | 99.32 mph (159.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1360 | 1580 | 1702 | 1777 | 1858 | 1916 | 1979 | 2055 | 2159 | 2263 | 2379 | 2471 | 2639 | 2824 | 2969 | 3062 | 3114 | 3305 | 3571 | 4150 |
Better Fuel Economy Factory Ratios Increased Power
