Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 355/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 38.17 (969.5) | 0.18 (4.46) 0.5% |
| Width inches (mm) | 15.51 (394) | 13.98 (355) | -1.54 (-39) -9.9% |
| Circum. inches (mm) | 119.36 (3031.76) | 119.91 (3045.77) | 0.55 (14.01) 0.5% |
| Sidewall Height inches (mm) | 9 (228.52) | 9.08 (230.75) | 0.09 (2.23) 1% |
| Revolutions per mile (km) | 530.83 (329.84) | 528.39 (328.32) | -2.44 (-1.52) -0.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.09 mph (32.34 km/h) |
| 25 mph (40.23 km/h) | 25.12 mph (40.42 km/h) |
| 30 mph (48.28 km/h) | 30.14 mph (48.5 km/h) |
| 35 mph (56.33 km/h) | 35.16 mph (56.59 km/h) |
| 40 mph (64.37 km/h) | 40.18 mph (64.67 km/h) |
| 45 mph (72.42 km/h) | 45.21 mph (72.76 km/h) |
| 50 mph (80.47 km/h) | 50.23 mph (80.84 km/h) |
| 55 mph (88.51 km/h) | 55.25 mph (88.92 km/h) |
| 60 mph (96.56 km/h) | 60.28 mph (97.01 km/h) |
| 65 mph (104.61 km/h) | 65.3 mph (105.09 km/h) |
| 70 mph (112.65 km/h) | 70.32 mph (113.17 km/h) |
| 75 mph (120.7 km/h) | 75.35 mph (121.26 km/h) |
| 80 mph (128.75 km/h) | 80.37 mph (129.34 km/h) |
| 85 mph (136.79 km/h) | 85.39 mph (137.43 km/h) |
| 90 mph (144.84 km/h) | 90.42 mph (145.51 km/h) |
| 95 mph (152.89 km/h) | 95.44 mph (153.59 km/h) |
| 100 mph (160.93 km/h) | 100.46 mph (161.68 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1345 | 1562 | 1682 | 1757 | 1837 | 1894 | 1957 | 2031 | 2134 | 2237 | 2352 | 2443 | 2609 | 2792 | 2935 | 3027 | 3078 | 3267 | 3530 | 4103 |
Better Fuel Economy Factory Ratios Increased Power
