Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/50-21 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.83 (808.4) | 31.91 (810.5) | 0.08 (2.1) 0.3% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 99.99 (2539.66) | 100.25 (2546.26) | 0.26 (6.6) 0.3% |
| Sidewall Height inches (mm) | 5.41 (137.5) | 5.95 (151.25) | 0.54 (13.75) 10% |
| Revolutions per mile (km) | 633.68 (393.75) | 632.04 (392.73) | -1.64 (-1.02) -0.3% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.05 mph (32.27 km/h) |
| 25 mph (40.23 km/h) | 25.06 mph (40.34 km/h) |
| 30 mph (48.28 km/h) | 30.08 mph (48.41 km/h) |
| 35 mph (56.33 km/h) | 35.09 mph (56.47 km/h) |
| 40 mph (64.37 km/h) | 40.1 mph (64.54 km/h) |
| 45 mph (72.42 km/h) | 45.12 mph (72.61 km/h) |
| 50 mph (80.47 km/h) | 50.13 mph (80.68 km/h) |
| 55 mph (88.51 km/h) | 55.14 mph (88.74 km/h) |
| 60 mph (96.56 km/h) | 60.16 mph (96.81 km/h) |
| 65 mph (104.61 km/h) | 65.17 mph (104.88 km/h) |
| 70 mph (112.65 km/h) | 70.18 mph (112.95 km/h) |
| 75 mph (120.7 km/h) | 75.19 mph (121.01 km/h) |
| 80 mph (128.75 km/h) | 80.21 mph (129.08 km/h) |
| 85 mph (136.79 km/h) | 85.22 mph (137.15 km/h) |
| 90 mph (144.84 km/h) | 90.23 mph (145.22 km/h) |
| 95 mph (152.89 km/h) | 95.25 mph (153.29 km/h) |
| 100 mph (160.93 km/h) | 100.26 mph (161.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1608 | 1869 | 2012 | 2101 | 2197 | 2265 | 2341 | 2430 | 2553 | 2676 | 2813 | 2923 | 3121 | 3340 | 3511 | 3621 | 3682 | 3908 | 4223 | 4907 |
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