Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-21 | 275/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.91 (835.9) | 30.83 (783) | -2.08 (-52.9) -6.3% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 103.39 (2626.06) | 96.85 (2459.87) | -6.54 (-166.19) -6.3% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 5.41 (137.5) | -0.54 (-13.75) -9.1% |
| Revolutions per mile (km) | 612.84 (380.8) | 654.24 (406.53) | 41.4 (25.73) 6.8% |
275/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.73 mph (30.15 km/h) |
| 25 mph (40.23 km/h) | 23.42 mph (37.69 km/h) |
| 30 mph (48.28 km/h) | 28.1 mph (45.22 km/h) |
| 35 mph (56.33 km/h) | 32.79 mph (52.76 km/h) |
| 40 mph (64.37 km/h) | 37.47 mph (60.3 km/h) |
| 45 mph (72.42 km/h) | 42.15 mph (67.84 km/h) |
| 50 mph (80.47 km/h) | 46.84 mph (75.37 km/h) |
| 55 mph (88.51 km/h) | 51.52 mph (82.91 km/h) |
| 60 mph (96.56 km/h) | 56.2 mph (90.45 km/h) |
| 65 mph (104.61 km/h) | 60.89 mph (97.99 km/h) |
| 70 mph (112.65 km/h) | 65.57 mph (105.52 km/h) |
| 75 mph (120.7 km/h) | 70.25 mph (113.06 km/h) |
| 80 mph (128.75 km/h) | 74.94 mph (120.6 km/h) |
| 85 mph (136.79 km/h) | 79.62 mph (128.14 km/h) |
| 90 mph (144.84 km/h) | 84.3 mph (135.67 km/h) |
| 95 mph (152.89 km/h) | 88.99 mph (143.21 km/h) |
| 100 mph (160.93 km/h) | 93.67 mph (150.75 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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