Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 335/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 42.42 (1077.5) | 4.43 (112.46) 11.7% |
| Width inches (mm) | 15.51 (394) | 13.19 (335) | -2.32 (-59) -15% |
| Circum. inches (mm) | 119.36 (3031.76) | 133.27 (3385.07) | 13.91 (353.3) 11.7% |
| Sidewall Height inches (mm) | 9 (228.52) | 11.21 (284.75) | 2.21 (56.23) 24.6% |
| Revolutions per mile (km) | 530.83 (329.84) | 475.42 (295.41) | -55.4 (-34.43) -10.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.33 mph (35.94 km/h) |
| 25 mph (40.23 km/h) | 27.91 mph (44.92 km/h) |
| 30 mph (48.28 km/h) | 33.5 mph (53.91 km/h) |
| 35 mph (56.33 km/h) | 39.08 mph (62.89 km/h) |
| 40 mph (64.37 km/h) | 44.66 mph (71.88 km/h) |
| 45 mph (72.42 km/h) | 50.24 mph (80.86 km/h) |
| 50 mph (80.47 km/h) | 55.83 mph (89.84 km/h) |
| 55 mph (88.51 km/h) | 61.41 mph (98.83 km/h) |
| 60 mph (96.56 km/h) | 66.99 mph (107.81 km/h) |
| 65 mph (104.61 km/h) | 72.57 mph (116.8 km/h) |
| 70 mph (112.65 km/h) | 78.16 mph (125.78 km/h) |
| 75 mph (120.7 km/h) | 83.74 mph (134.77 km/h) |
| 80 mph (128.75 km/h) | 89.32 mph (143.75 km/h) |
| 85 mph (136.79 km/h) | 94.91 mph (152.74 km/h) |
| 90 mph (144.84 km/h) | 100.49 mph (161.72 km/h) |
| 95 mph (152.89 km/h) | 106.07 mph (170.7 km/h) |
| 100 mph (160.93 km/h) | 111.65 mph (179.69 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1210 | 1406 | 1514 | 1581 | 1653 | 1704 | 1761 | 1828 | 1920 | 2013 | 2116 | 2198 | 2348 | 2512 | 2641 | 2723 | 2770 | 2940 | 3177 | 3691 |
Better Fuel Economy Factory Ratios Increased Power
