Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/60-20 | 285/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.8 (706) | 31.22 (793) | 3.43 (87) 12.3% |
| Width inches (mm) | 6.5 (165) | 11.22 (285) | 4.72 (120) 72.7% |
| Circum. inches (mm) | 87.32 (2217.96) | 98.08 (2491.28) | 10.76 (273.32) 12.3% |
| Sidewall Height inches (mm) | 3.9 (99) | 5.61 (142.5) | 1.71 (43.5) 43.9% |
| Revolutions per mile (km) | 725.6 (450.86) | 645.99 (401.4) | -79.61 (-49.46) -11% |
285/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.46 mph (36.15 km/h) |
| 25 mph (40.23 km/h) | 28.08 mph (45.19 km/h) |
| 30 mph (48.28 km/h) | 33.7 mph (54.23 km/h) |
| 35 mph (56.33 km/h) | 39.31 mph (63.27 km/h) |
| 40 mph (64.37 km/h) | 44.93 mph (72.31 km/h) |
| 45 mph (72.42 km/h) | 50.55 mph (81.34 km/h) |
| 50 mph (80.47 km/h) | 56.16 mph (90.38 km/h) |
| 55 mph (88.51 km/h) | 61.78 mph (99.42 km/h) |
| 60 mph (96.56 km/h) | 67.39 mph (108.46 km/h) |
| 65 mph (104.61 km/h) | 73.01 mph (117.5 km/h) |
| 70 mph (112.65 km/h) | 78.63 mph (126.54 km/h) |
| 75 mph (120.7 km/h) | 84.24 mph (135.57 km/h) |
| 80 mph (128.75 km/h) | 89.86 mph (144.61 km/h) |
| 85 mph (136.79 km/h) | 95.47 mph (153.65 km/h) |
| 90 mph (144.84 km/h) | 101.09 mph (162.69 km/h) |
| 95 mph (152.89 km/h) | 106.71 mph (171.73 km/h) |
| 100 mph (160.93 km/h) | 112.32 mph (180.77 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1644 | 1910 | 2057 | 2148 | 2246 | 2315 | 2392 | 2483 | 2609 | 2735 | 2875 | 2987 | 3190 | 3414 | 3589 | 3701 | 3764 | 3994 | 4316 | 5016 |
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