Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/50-20 | 285/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.83 (783) | 31.22 (793) | 0.39 (10) 1.3% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 96.85 (2459.87) | 98.08 (2491.28) | 1.24 (31.42) 1.3% |
| Sidewall Height inches (mm) | 5.41 (137.5) | 5.61 (142.5) | 0.2 (5) 3.6% |
| Revolutions per mile (km) | 654.24 (406.53) | 645.99 (401.4) | -8.25 (-5.13) -1.3% |
285/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.26 mph (32.6 km/h) |
| 25 mph (40.23 km/h) | 25.32 mph (40.75 km/h) |
| 30 mph (48.28 km/h) | 30.38 mph (48.9 km/h) |
| 35 mph (56.33 km/h) | 35.45 mph (57.05 km/h) |
| 40 mph (64.37 km/h) | 40.51 mph (65.2 km/h) |
| 45 mph (72.42 km/h) | 45.57 mph (73.35 km/h) |
| 50 mph (80.47 km/h) | 50.64 mph (81.5 km/h) |
| 55 mph (88.51 km/h) | 55.7 mph (89.64 km/h) |
| 60 mph (96.56 km/h) | 60.77 mph (97.79 km/h) |
| 65 mph (104.61 km/h) | 65.83 mph (105.94 km/h) |
| 70 mph (112.65 km/h) | 70.89 mph (114.09 km/h) |
| 75 mph (120.7 km/h) | 75.96 mph (122.24 km/h) |
| 80 mph (128.75 km/h) | 81.02 mph (130.39 km/h) |
| 85 mph (136.79 km/h) | 86.09 mph (138.54 km/h) |
| 90 mph (144.84 km/h) | 91.15 mph (146.69 km/h) |
| 95 mph (152.89 km/h) | 96.21 mph (154.84 km/h) |
| 100 mph (160.93 km/h) | 101.28 mph (162.99 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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