Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 375/40-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 33.81 (858.8) | -4.18 (-106.24) -11% |
| Width inches (mm) | 15.51 (394) | 14.76 (375) | -0.75 (-19) -4.8% |
| Circum. inches (mm) | 119.36 (3031.76) | 106.22 (2698) | -13.14 (-333.76) -11% |
| Sidewall Height inches (mm) | 9 (228.52) | 5.91 (150) | -3.09 (-78.52) -34.4% |
| Revolutions per mile (km) | 530.83 (329.84) | 596.5 (370.64) | 65.67 (40.8) 12.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.8 mph (28.64 km/h) |
| 25 mph (40.23 km/h) | 22.25 mph (35.8 km/h) |
| 30 mph (48.28 km/h) | 26.7 mph (42.97 km/h) |
| 35 mph (56.33 km/h) | 31.15 mph (50.13 km/h) |
| 40 mph (64.37 km/h) | 35.6 mph (57.29 km/h) |
| 45 mph (72.42 km/h) | 40.05 mph (64.45 km/h) |
| 50 mph (80.47 km/h) | 44.5 mph (71.61 km/h) |
| 55 mph (88.51 km/h) | 48.95 mph (78.77 km/h) |
| 60 mph (96.56 km/h) | 53.39 mph (85.93 km/h) |
| 65 mph (104.61 km/h) | 57.84 mph (93.09 km/h) |
| 70 mph (112.65 km/h) | 62.29 mph (100.25 km/h) |
| 75 mph (120.7 km/h) | 66.74 mph (107.41 km/h) |
| 80 mph (128.75 km/h) | 71.19 mph (114.57 km/h) |
| 85 mph (136.79 km/h) | 75.64 mph (121.73 km/h) |
| 90 mph (144.84 km/h) | 80.09 mph (128.9 km/h) |
| 95 mph (152.89 km/h) | 84.54 mph (136.06 km/h) |
| 100 mph (160.93 km/h) | 88.99 mph (143.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1518 | 1763 | 1899 | 1983 | 2073 | 2138 | 2209 | 2293 | 2409 | 2526 | 2655 | 2758 | 2946 | 3152 | 3314 | 3417 | 3475 | 3688 | 3985 | 4631 |
Better Fuel Economy Factory Ratios Increased Power
