Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/45-20 | 275/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.1 (764.5) | 30.83 (783) | 0.73 (18.5) 2.4% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 94.56 (2401.75) | 96.85 (2459.87) | 2.29 (58.12) 2.4% |
| Sidewall Height inches (mm) | 5.05 (128.25) | 5.41 (137.5) | 0.36 (9.25) 7.2% |
| Revolutions per mile (km) | 670.07 (416.36) | 654.24 (406.53) | -15.83 (-9.84) -2.4% |
275/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.48 mph (32.97 km/h) |
| 25 mph (40.23 km/h) | 25.6 mph (41.21 km/h) |
| 30 mph (48.28 km/h) | 30.73 mph (49.45 km/h) |
| 35 mph (56.33 km/h) | 35.85 mph (57.69 km/h) |
| 40 mph (64.37 km/h) | 40.97 mph (65.93 km/h) |
| 45 mph (72.42 km/h) | 46.09 mph (74.17 km/h) |
| 50 mph (80.47 km/h) | 51.21 mph (82.41 km/h) |
| 55 mph (88.51 km/h) | 56.33 mph (90.66 km/h) |
| 60 mph (96.56 km/h) | 61.45 mph (98.9 km/h) |
| 65 mph (104.61 km/h) | 66.57 mph (107.14 km/h) |
| 70 mph (112.65 km/h) | 71.69 mph (115.38 km/h) |
| 75 mph (120.7 km/h) | 76.81 mph (123.62 km/h) |
| 80 mph (128.75 km/h) | 81.94 mph (131.86 km/h) |
| 85 mph (136.79 km/h) | 87.06 mph (140.1 km/h) |
| 90 mph (144.84 km/h) | 92.18 mph (148.35 km/h) |
| 95 mph (152.89 km/h) | 97.3 mph (156.59 km/h) |
| 100 mph (160.93 km/h) | 102.42 mph (164.83 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1665 | 1934 | 2083 | 2175 | 2274 | 2345 | 2423 | 2515 | 2643 | 2770 | 2912 | 3025 | 3231 | 3457 | 3634 | 3748 | 3812 | 4045 | 4371 | 5080 |
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