Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/13.5-20 | 386/70-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.1 (967.62) | 37.28 (946.8) | -0.82 (-20.82) -2.2% |
| Width inches (mm) | 13.5 (343) | 15.2 (386) | 1.69 (43) 12.5% |
| Circum. inches (mm) | 119.68 (3039.87) | 117.1 (2974.46) | -2.58 (-65.41) -2.2% |
| Sidewall Height inches (mm) | 9.05 (229.81) | 10.64 (270.2) | 1.59 (40.39) 17.6% |
| Revolutions per mile (km) | 529.41 (328.96) | 541.05 (336.19) | 11.64 (7.23) 2.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.57 mph (31.49 km/h) |
| 25 mph (40.23 km/h) | 24.46 mph (39.37 km/h) |
| 30 mph (48.28 km/h) | 29.35 mph (47.24 km/h) |
| 35 mph (56.33 km/h) | 34.25 mph (55.12 km/h) |
| 40 mph (64.37 km/h) | 39.14 mph (62.99 km/h) |
| 45 mph (72.42 km/h) | 44.03 mph (70.86 km/h) |
| 50 mph (80.47 km/h) | 48.92 mph (78.74 km/h) |
| 55 mph (88.51 km/h) | 53.82 mph (86.61 km/h) |
| 60 mph (96.56 km/h) | 58.71 mph (94.48 km/h) |
| 65 mph (104.61 km/h) | 63.6 mph (102.36 km/h) |
| 70 mph (112.65 km/h) | 68.49 mph (110.23 km/h) |
| 75 mph (120.7 km/h) | 73.39 mph (118.1 km/h) |
| 80 mph (128.75 km/h) | 78.28 mph (125.98 km/h) |
| 85 mph (136.79 km/h) | 83.17 mph (133.85 km/h) |
| 90 mph (144.84 km/h) | 88.06 mph (141.72 km/h) |
| 95 mph (152.89 km/h) | 92.96 mph (149.6 km/h) |
| 100 mph (160.93 km/h) | 97.85 mph (157.47 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1377 | 1600 | 1723 | 1799 | 1881 | 1939 | 2004 | 2080 | 2185 | 2291 | 2408 | 2502 | 2672 | 2859 | 3006 | 3099 | 3152 | 3346 | 3615 | 4201 |
Better Fuel Economy Factory Ratios Increased Power
