Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/45-20 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.1 (764.5) | 31.91 (810.5) | 1.81 (46) 6% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 94.56 (2401.75) | 100.25 (2546.26) | 5.69 (144.51) 6% |
| Sidewall Height inches (mm) | 5.05 (128.25) | 5.95 (151.25) | 0.91 (23) 17.9% |
| Revolutions per mile (km) | 670.07 (416.36) | 632.04 (392.73) | -38.03 (-23.63) -5.7% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.2 mph (34.12 km/h) |
| 25 mph (40.23 km/h) | 26.5 mph (42.65 km/h) |
| 30 mph (48.28 km/h) | 31.81 mph (51.19 km/h) |
| 35 mph (56.33 km/h) | 37.11 mph (59.72 km/h) |
| 40 mph (64.37 km/h) | 42.41 mph (68.25 km/h) |
| 45 mph (72.42 km/h) | 47.71 mph (76.78 km/h) |
| 50 mph (80.47 km/h) | 53.01 mph (85.31 km/h) |
| 55 mph (88.51 km/h) | 58.31 mph (93.84 km/h) |
| 60 mph (96.56 km/h) | 63.61 mph (102.37 km/h) |
| 65 mph (104.61 km/h) | 68.91 mph (110.9 km/h) |
| 70 mph (112.65 km/h) | 74.21 mph (119.43 km/h) |
| 75 mph (120.7 km/h) | 79.51 mph (127.96 km/h) |
| 80 mph (128.75 km/h) | 84.81 mph (136.49 km/h) |
| 85 mph (136.79 km/h) | 90.11 mph (145.03 km/h) |
| 90 mph (144.84 km/h) | 95.42 mph (153.56 km/h) |
| 95 mph (152.89 km/h) | 100.72 mph (162.09 km/h) |
| 100 mph (160.93 km/h) | 106.02 mph (170.62 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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