Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 365/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 40.12 (1019) | -6.32 (-160.5) -13.6% |
| Width inches (mm) | 15.55 (395) | 14.37 (365) | -1.18 (-30) -7.6% |
| Circum. inches (mm) | 145.89 (3705.51) | 126.03 (3201.28) | -19.85 (-504.23) -13.6% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 10.06 (255.5) | -3.16 (-80.25) -23.9% |
| Revolutions per mile (km) | 434.31 (269.87) | 502.72 (312.37) | 68.41 (42.51) 15.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.28 mph (27.81 km/h) |
| 25 mph (40.23 km/h) | 21.6 mph (34.76 km/h) |
| 30 mph (48.28 km/h) | 25.92 mph (41.71 km/h) |
| 35 mph (56.33 km/h) | 30.24 mph (48.66 km/h) |
| 40 mph (64.37 km/h) | 34.56 mph (55.61 km/h) |
| 45 mph (72.42 km/h) | 38.88 mph (62.57 km/h) |
| 50 mph (80.47 km/h) | 43.2 mph (69.52 km/h) |
| 55 mph (88.51 km/h) | 47.52 mph (76.47 km/h) |
| 60 mph (96.56 km/h) | 51.84 mph (83.42 km/h) |
| 65 mph (104.61 km/h) | 56.16 mph (90.37 km/h) |
| 70 mph (112.65 km/h) | 60.47 mph (97.32 km/h) |
| 75 mph (120.7 km/h) | 64.79 mph (104.28 km/h) |
| 80 mph (128.75 km/h) | 69.11 mph (111.23 km/h) |
| 85 mph (136.79 km/h) | 73.43 mph (118.18 km/h) |
| 90 mph (144.84 km/h) | 77.75 mph (125.13 km/h) |
| 95 mph (152.89 km/h) | 82.07 mph (132.08 km/h) |
| 100 mph (160.93 km/h) | 86.39 mph (139.04 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1279 | 1486 | 1601 | 1671 | 1748 | 1802 | 1862 | 1933 | 2031 | 2129 | 2237 | 2325 | 2482 | 2657 | 2793 | 2880 | 2929 | 3108 | 3359 | 3903 |
Better Fuel Economy Factory Ratios Increased Power
