Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-20 | 285/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.91 (810.5) | 32.71 (830.8) | 0.8 (20.3) 2.5% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 100.25 (2546.26) | 102.76 (2610.04) | 2.51 (63.77) 2.5% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 7.85 (199.5) | 1.9 (48.25) 31.9% |
| Revolutions per mile (km) | 632.04 (392.73) | 616.6 (383.14) | -15.44 (-9.6) -2.4% |
285/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.5 mph (32.99 km/h) |
| 25 mph (40.23 km/h) | 25.63 mph (41.24 km/h) |
| 30 mph (48.28 km/h) | 30.75 mph (49.49 km/h) |
| 35 mph (56.33 km/h) | 35.88 mph (57.74 km/h) |
| 40 mph (64.37 km/h) | 41 mph (65.99 km/h) |
| 45 mph (72.42 km/h) | 46.13 mph (74.23 km/h) |
| 50 mph (80.47 km/h) | 51.25 mph (82.48 km/h) |
| 55 mph (88.51 km/h) | 56.38 mph (90.73 km/h) |
| 60 mph (96.56 km/h) | 61.5 mph (98.98 km/h) |
| 65 mph (104.61 km/h) | 66.63 mph (107.23 km/h) |
| 70 mph (112.65 km/h) | 71.75 mph (115.48 km/h) |
| 75 mph (120.7 km/h) | 76.88 mph (123.72 km/h) |
| 80 mph (128.75 km/h) | 82 mph (131.97 km/h) |
| 85 mph (136.79 km/h) | 87.13 mph (140.22 km/h) |
| 90 mph (144.84 km/h) | 92.25 mph (148.47 km/h) |
| 95 mph (152.89 km/h) | 97.38 mph (156.72 km/h) |
| 100 mph (160.93 km/h) | 102.5 mph (164.97 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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