Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/80-20 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.32 (948) | 31.91 (810.5) | -5.41 (-137.5) -14.5% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 117.25 (2978.23) | 100.25 (2546.26) | -17.01 (-431.97) -14.5% |
| Sidewall Height inches (mm) | 8.66 (220) | 5.95 (151.25) | -2.71 (-68.75) -31.3% |
| Revolutions per mile (km) | 540.37 (335.77) | 632.04 (392.73) | 91.67 (56.96) 17% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.1 mph (27.52 km/h) |
| 25 mph (40.23 km/h) | 21.37 mph (34.4 km/h) |
| 30 mph (48.28 km/h) | 25.65 mph (41.28 km/h) |
| 35 mph (56.33 km/h) | 29.92 mph (48.16 km/h) |
| 40 mph (64.37 km/h) | 34.2 mph (55.04 km/h) |
| 45 mph (72.42 km/h) | 38.47 mph (61.92 km/h) |
| 50 mph (80.47 km/h) | 42.75 mph (68.8 km/h) |
| 55 mph (88.51 km/h) | 47.02 mph (75.68 km/h) |
| 60 mph (96.56 km/h) | 51.3 mph (82.56 km/h) |
| 65 mph (104.61 km/h) | 55.57 mph (89.44 km/h) |
| 70 mph (112.65 km/h) | 59.85 mph (96.31 km/h) |
| 75 mph (120.7 km/h) | 64.12 mph (103.19 km/h) |
| 80 mph (128.75 km/h) | 68.4 mph (110.07 km/h) |
| 85 mph (136.79 km/h) | 72.67 mph (116.95 km/h) |
| 90 mph (144.84 km/h) | 76.95 mph (123.83 km/h) |
| 95 mph (152.89 km/h) | 81.22 mph (130.71 km/h) |
| 100 mph (160.93 km/h) | 85.5 mph (137.59 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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