Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 385/65-22.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 42.2 (1072) | -4.23 (-107.5) -9.1% |
| Width inches (mm) | 15.55 (395) | 15.16 (385) | -0.39 (-10) -2.5% |
| Circum. inches (mm) | 145.89 (3705.51) | 132.59 (3367.79) | -13.3 (-337.72) -9.1% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 9.85 (250.25) | -3.37 (-85.5) -25.5% |
| Revolutions per mile (km) | 434.31 (269.87) | 477.86 (296.93) | 43.55 (27.06) 10% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.18 mph (29.25 km/h) |
| 25 mph (40.23 km/h) | 22.72 mph (36.57 km/h) |
| 30 mph (48.28 km/h) | 27.27 mph (43.88 km/h) |
| 35 mph (56.33 km/h) | 31.81 mph (51.19 km/h) |
| 40 mph (64.37 km/h) | 36.35 mph (58.51 km/h) |
| 45 mph (72.42 km/h) | 40.9 mph (65.82 km/h) |
| 50 mph (80.47 km/h) | 45.44 mph (73.13 km/h) |
| 55 mph (88.51 km/h) | 49.99 mph (80.45 km/h) |
| 60 mph (96.56 km/h) | 54.53 mph (87.76 km/h) |
| 65 mph (104.61 km/h) | 59.08 mph (95.07 km/h) |
| 70 mph (112.65 km/h) | 63.62 mph (102.39 km/h) |
| 75 mph (120.7 km/h) | 68.16 mph (109.7 km/h) |
| 80 mph (128.75 km/h) | 72.71 mph (117.01 km/h) |
| 85 mph (136.79 km/h) | 77.25 mph (124.33 km/h) |
| 90 mph (144.84 km/h) | 81.8 mph (131.64 km/h) |
| 95 mph (152.89 km/h) | 86.34 mph (138.95 km/h) |
| 100 mph (160.93 km/h) | 90.89 mph (146.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1216 | 1413 | 1521 | 1589 | 1661 | 1713 | 1770 | 1837 | 1930 | 2023 | 2127 | 2210 | 2360 | 2525 | 2655 | 2737 | 2784 | 2955 | 3193 | 3710 |
Better Fuel Economy Factory Ratios Increased Power
