Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/13.5-20 | 38/15.5-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.1 (967.62) | 38.03 (965.88) | -0.07 (-1.74) -0.2% |
| Width inches (mm) | 13.5 (343) | 15.51 (394) | 2.01 (51) 14.9% |
| Circum. inches (mm) | 119.68 (3039.87) | 119.46 (3034.4) | -0.22 (-5.47) -0.2% |
| Sidewall Height inches (mm) | 9.05 (229.81) | 11.01 (279.74) | 1.97 (49.93) 21.7% |
| Revolutions per mile (km) | 529.41 (328.96) | 530.37 (329.55) | 0.95 (0.59) 0.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.96 mph (32.13 km/h) |
| 25 mph (40.23 km/h) | 24.96 mph (40.16 km/h) |
| 30 mph (48.28 km/h) | 29.95 mph (48.19 km/h) |
| 35 mph (56.33 km/h) | 34.94 mph (56.23 km/h) |
| 40 mph (64.37 km/h) | 39.93 mph (64.26 km/h) |
| 45 mph (72.42 km/h) | 44.92 mph (72.29 km/h) |
| 50 mph (80.47 km/h) | 49.91 mph (80.32 km/h) |
| 55 mph (88.51 km/h) | 54.9 mph (88.35 km/h) |
| 60 mph (96.56 km/h) | 59.89 mph (96.39 km/h) |
| 65 mph (104.61 km/h) | 64.88 mph (104.42 km/h) |
| 70 mph (112.65 km/h) | 69.87 mph (112.45 km/h) |
| 75 mph (120.7 km/h) | 74.87 mph (120.48 km/h) |
| 80 mph (128.75 km/h) | 79.86 mph (128.52 km/h) |
| 85 mph (136.79 km/h) | 84.85 mph (136.55 km/h) |
| 90 mph (144.84 km/h) | 89.84 mph (144.58 km/h) |
| 95 mph (152.89 km/h) | 94.83 mph (152.61 km/h) |
| 100 mph (160.93 km/h) | 99.82 mph (160.65 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1350 | 1568 | 1689 | 1763 | 1844 | 1901 | 1964 | 2039 | 2142 | 2246 | 2361 | 2452 | 2619 | 2803 | 2946 | 3038 | 3090 | 3279 | 3544 | 4118 |
Better Fuel Economy Factory Ratios Increased Power
