Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/75-20 | 285/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.83 (935.5) | 34.59 (878.5) | -2.24 (-57) -6.1% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 115.71 (2938.96) | 108.66 (2759.89) | -7.05 (-179.07) -6.1% |
| Sidewall Height inches (mm) | 8.42 (213.75) | 7.29 (185.25) | -1.12 (-28.5) -13.3% |
| Revolutions per mile (km) | 547.59 (340.26) | 583.12 (362.33) | 35.53 (22.08) 6.5% |
285/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.78 mph (30.23 km/h) |
| 25 mph (40.23 km/h) | 23.48 mph (37.78 km/h) |
| 30 mph (48.28 km/h) | 28.17 mph (45.34 km/h) |
| 35 mph (56.33 km/h) | 32.87 mph (52.9 km/h) |
| 40 mph (64.37 km/h) | 37.56 mph (60.45 km/h) |
| 45 mph (72.42 km/h) | 42.26 mph (68.01 km/h) |
| 50 mph (80.47 km/h) | 46.95 mph (75.56 km/h) |
| 55 mph (88.51 km/h) | 51.65 mph (83.12 km/h) |
| 60 mph (96.56 km/h) | 56.34 mph (90.68 km/h) |
| 65 mph (104.61 km/h) | 61.04 mph (98.23 km/h) |
| 70 mph (112.65 km/h) | 65.73 mph (105.79 km/h) |
| 75 mph (120.7 km/h) | 70.43 mph (113.35 km/h) |
| 80 mph (128.75 km/h) | 75.13 mph (120.9 km/h) |
| 85 mph (136.79 km/h) | 79.82 mph (128.46 km/h) |
| 90 mph (144.84 km/h) | 84.52 mph (136.02 km/h) |
| 95 mph (152.89 km/h) | 89.21 mph (143.57 km/h) |
| 100 mph (160.93 km/h) | 93.91 mph (151.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1484 | 1724 | 1856 | 1939 | 2027 | 2090 | 2160 | 2242 | 2355 | 2469 | 2595 | 2696 | 2879 | 3082 | 3239 | 3340 | 3397 | 3606 | 3896 | 4528 |
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