Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/13.5-20 | 395/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.1 (967.62) | 46.44 (1179.5) | 8.34 (211.88) 21.9% |
| Width inches (mm) | 13.5 (343) | 15.55 (395) | 2.05 (52) 15.2% |
| Circum. inches (mm) | 119.68 (3039.87) | 145.89 (3705.51) | 26.21 (665.64) 21.9% |
| Sidewall Height inches (mm) | 9.05 (229.81) | 13.22 (335.75) | 4.17 (105.94) 46.1% |
| Revolutions per mile (km) | 529.41 (328.96) | 434.31 (269.87) | -95.1 (-59.09) -18% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.38 mph (39.23 km/h) |
| 25 mph (40.23 km/h) | 30.47 mph (49.04 km/h) |
| 30 mph (48.28 km/h) | 36.57 mph (58.85 km/h) |
| 35 mph (56.33 km/h) | 42.66 mph (68.66 km/h) |
| 40 mph (64.37 km/h) | 48.76 mph (78.47 km/h) |
| 45 mph (72.42 km/h) | 54.85 mph (88.28 km/h) |
| 50 mph (80.47 km/h) | 60.95 mph (98.09 km/h) |
| 55 mph (88.51 km/h) | 67.04 mph (107.9 km/h) |
| 60 mph (96.56 km/h) | 73.14 mph (117.7 km/h) |
| 65 mph (104.61 km/h) | 79.23 mph (127.51 km/h) |
| 70 mph (112.65 km/h) | 85.33 mph (137.32 km/h) |
| 75 mph (120.7 km/h) | 91.42 mph (147.13 km/h) |
| 80 mph (128.75 km/h) | 97.52 mph (156.94 km/h) |
| 85 mph (136.79 km/h) | 103.61 mph (166.75 km/h) |
| 90 mph (144.84 km/h) | 109.71 mph (176.56 km/h) |
| 95 mph (152.89 km/h) | 115.8 mph (186.37 km/h) |
| 100 mph (160.93 km/h) | 121.9 mph (196.17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
