Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 395/85-20 | 395/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 46.44 (1179.5) | 37.11 (942.5) | -9.33 (-237) -20.1% |
| Width inches (mm) | 15.55 (395) | 15.55 (395) | 0 (0) 0% |
| Circum. inches (mm) | 145.89 (3705.51) | 116.57 (2960.95) | -29.31 (-744.56) -20.1% |
| Sidewall Height inches (mm) | 13.22 (335.75) | 8.55 (217.25) | -4.67 (-118.5) -35.3% |
| Revolutions per mile (km) | 434.31 (269.87) | 543.52 (337.73) | 109.21 (67.86) 25.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 15.98 mph (25.72 km/h) |
| 25 mph (40.23 km/h) | 19.98 mph (32.15 km/h) |
| 30 mph (48.28 km/h) | 23.97 mph (38.58 km/h) |
| 35 mph (56.33 km/h) | 27.97 mph (45.01 km/h) |
| 40 mph (64.37 km/h) | 31.96 mph (51.44 km/h) |
| 45 mph (72.42 km/h) | 35.96 mph (57.87 km/h) |
| 50 mph (80.47 km/h) | 39.95 mph (64.3 km/h) |
| 55 mph (88.51 km/h) | 43.95 mph (70.73 km/h) |
| 60 mph (96.56 km/h) | 47.94 mph (77.16 km/h) |
| 65 mph (104.61 km/h) | 51.94 mph (83.59 km/h) |
| 70 mph (112.65 km/h) | 55.93 mph (90.02 km/h) |
| 75 mph (120.7 km/h) | 59.93 mph (96.45 km/h) |
| 80 mph (128.75 km/h) | 63.93 mph (102.88 km/h) |
| 85 mph (136.79 km/h) | 67.92 mph (109.31 km/h) |
| 90 mph (144.84 km/h) | 71.92 mph (115.74 km/h) |
| 95 mph (152.89 km/h) | 75.91 mph (122.17 km/h) |
| 100 mph (160.93 km/h) | 79.91 mph (128.6 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1383 | 1607 | 1730 | 1807 | 1889 | 1948 | 2013 | 2089 | 2195 | 2301 | 2419 | 2513 | 2684 | 2872 | 3019 | 3114 | 3167 | 3361 | 3632 | 4220 |
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