Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-19 | 285/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.76 (730.6) | 31.22 (793) | 2.46 (62.4) 8.5% |
| Width inches (mm) | 6.1 (155) | 11.22 (285) | 5.12 (130) 83.9% |
| Circum. inches (mm) | 90.36 (2295.25) | 98.08 (2491.28) | 7.72 (196.04) 8.5% |
| Sidewall Height inches (mm) | 4.88 (124) | 5.61 (142.5) | 0.73 (18.5) 14.9% |
| Revolutions per mile (km) | 701.16 (435.68) | 645.99 (401.4) | -55.17 (-34.28) -7.9% |
285/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.71 mph (34.94 km/h) |
| 25 mph (40.23 km/h) | 27.14 mph (43.67 km/h) |
| 30 mph (48.28 km/h) | 32.56 mph (52.4 km/h) |
| 35 mph (56.33 km/h) | 37.99 mph (61.14 km/h) |
| 40 mph (64.37 km/h) | 43.42 mph (69.87 km/h) |
| 45 mph (72.42 km/h) | 48.84 mph (78.61 km/h) |
| 50 mph (80.47 km/h) | 54.27 mph (87.34 km/h) |
| 55 mph (88.51 km/h) | 59.7 mph (96.07 km/h) |
| 60 mph (96.56 km/h) | 65.12 mph (104.81 km/h) |
| 65 mph (104.61 km/h) | 70.55 mph (113.54 km/h) |
| 70 mph (112.65 km/h) | 75.98 mph (122.28 km/h) |
| 75 mph (120.7 km/h) | 81.41 mph (131.01 km/h) |
| 80 mph (128.75 km/h) | 86.83 mph (139.74 km/h) |
| 85 mph (136.79 km/h) | 92.26 mph (148.48 km/h) |
| 90 mph (144.84 km/h) | 97.69 mph (157.21 km/h) |
| 95 mph (152.89 km/h) | 103.11 mph (165.95 km/h) |
| 100 mph (160.93 km/h) | 108.54 mph (174.68 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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