Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 375/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 34.76 (883) | -3.23 (-82.04) -8.5% |
| Width inches (mm) | 15.51 (394) | 14.76 (375) | -0.75 (-19) -4.8% |
| Circum. inches (mm) | 119.36 (3031.76) | 109.21 (2774.03) | -10.15 (-257.74) -8.5% |
| Sidewall Height inches (mm) | 9 (228.52) | 7.38 (187.5) | -1.61 (-41.02) -18% |
| Revolutions per mile (km) | 530.83 (329.84) | 580.15 (360.49) | 49.32 (30.65) 9.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.3 mph (29.45 km/h) |
| 25 mph (40.23 km/h) | 22.87 mph (36.81 km/h) |
| 30 mph (48.28 km/h) | 27.45 mph (44.18 km/h) |
| 35 mph (56.33 km/h) | 32.02 mph (51.54 km/h) |
| 40 mph (64.37 km/h) | 36.6 mph (58.9 km/h) |
| 45 mph (72.42 km/h) | 41.17 mph (66.26 km/h) |
| 50 mph (80.47 km/h) | 45.75 mph (73.63 km/h) |
| 55 mph (88.51 km/h) | 50.32 mph (80.99 km/h) |
| 60 mph (96.56 km/h) | 54.9 mph (88.35 km/h) |
| 65 mph (104.61 km/h) | 59.47 mph (95.71 km/h) |
| 70 mph (112.65 km/h) | 64.05 mph (103.08 km/h) |
| 75 mph (120.7 km/h) | 68.62 mph (110.44 km/h) |
| 80 mph (128.75 km/h) | 73.2 mph (117.8 km/h) |
| 85 mph (136.79 km/h) | 77.77 mph (125.17 km/h) |
| 90 mph (144.84 km/h) | 82.35 mph (132.53 km/h) |
| 95 mph (152.89 km/h) | 86.92 mph (139.89 km/h) |
| 100 mph (160.93 km/h) | 91.5 mph (147.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1476 | 1715 | 1847 | 1929 | 2017 | 2079 | 2149 | 2230 | 2343 | 2456 | 2582 | 2683 | 2865 | 3066 | 3223 | 3323 | 3380 | 3587 | 3876 | 4504 |
Better Fuel Economy Factory Ratios Increased Power
