Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/50-20 | 285/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.83 (783) | 32.71 (830.8) | 1.88 (47.8) 6.1% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 96.85 (2459.87) | 102.76 (2610.04) | 5.91 (150.17) 6.1% |
| Sidewall Height inches (mm) | 5.41 (137.5) | 7.85 (199.5) | 2.44 (62) 45.1% |
| Revolutions per mile (km) | 654.24 (406.53) | 616.6 (383.14) | -37.64 (-23.39) -5.8% |
285/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.22 mph (34.15 km/h) |
| 25 mph (40.23 km/h) | 26.53 mph (42.69 km/h) |
| 30 mph (48.28 km/h) | 31.83 mph (51.23 km/h) |
| 35 mph (56.33 km/h) | 37.14 mph (59.77 km/h) |
| 40 mph (64.37 km/h) | 42.44 mph (68.3 km/h) |
| 45 mph (72.42 km/h) | 47.75 mph (76.84 km/h) |
| 50 mph (80.47 km/h) | 53.05 mph (85.38 km/h) |
| 55 mph (88.51 km/h) | 58.36 mph (93.92 km/h) |
| 60 mph (96.56 km/h) | 63.66 mph (102.46 km/h) |
| 65 mph (104.61 km/h) | 68.97 mph (110.99 km/h) |
| 70 mph (112.65 km/h) | 74.27 mph (119.53 km/h) |
| 75 mph (120.7 km/h) | 79.58 mph (128.07 km/h) |
| 80 mph (128.75 km/h) | 84.88 mph (136.61 km/h) |
| 85 mph (136.79 km/h) | 90.19 mph (145.15 km/h) |
| 90 mph (144.84 km/h) | 95.49 mph (153.68 km/h) |
| 95 mph (152.89 km/h) | 100.8 mph (162.22 km/h) |
| 100 mph (160.93 km/h) | 106.1 mph (170.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1569 | 1823 | 1963 | 2050 | 2143 | 2210 | 2284 | 2370 | 2491 | 2611 | 2744 | 2851 | 3045 | 3258 | 3425 | 3532 | 3592 | 3813 | 4120 | 4788 |
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