Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/75-17 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.06 (814.3) | 31.91 (810.5) | -0.15 (-3.8) -0.5% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 100.72 (2558.2) | 100.25 (2546.26) | -0.47 (-11.94) -0.5% |
| Sidewall Height inches (mm) | 7.53 (191.25) | 5.95 (151.25) | -1.57 (-40) -20.9% |
| Revolutions per mile (km) | 629.09 (390.9) | 632.04 (392.73) | 2.95 (1.83) 0.5% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.91 mph (32.04 km/h) |
| 25 mph (40.23 km/h) | 24.88 mph (40.05 km/h) |
| 30 mph (48.28 km/h) | 29.86 mph (48.06 km/h) |
| 35 mph (56.33 km/h) | 34.84 mph (56.06 km/h) |
| 40 mph (64.37 km/h) | 39.81 mph (64.07 km/h) |
| 45 mph (72.42 km/h) | 44.79 mph (72.08 km/h) |
| 50 mph (80.47 km/h) | 49.77 mph (80.09 km/h) |
| 55 mph (88.51 km/h) | 54.74 mph (88.1 km/h) |
| 60 mph (96.56 km/h) | 59.72 mph (96.11 km/h) |
| 65 mph (104.61 km/h) | 64.7 mph (104.12 km/h) |
| 70 mph (112.65 km/h) | 69.67 mph (112.13 km/h) |
| 75 mph (120.7 km/h) | 74.65 mph (120.14 km/h) |
| 80 mph (128.75 km/h) | 79.63 mph (128.15 km/h) |
| 85 mph (136.79 km/h) | 84.6 mph (136.16 km/h) |
| 90 mph (144.84 km/h) | 89.58 mph (144.17 km/h) |
| 95 mph (152.89 km/h) | 94.56 mph (152.17 km/h) |
| 100 mph (160.93 km/h) | 99.53 mph (160.18 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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