Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/85-17 | 285/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.07 (865.3) | 32.71 (830.8) | -1.36 (-34.5) -4% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 107.02 (2718.42) | 102.76 (2610.04) | -4.27 (-108.38) -4% |
| Sidewall Height inches (mm) | 8.53 (216.75) | 7.85 (199.5) | -0.68 (-17.25) -8% |
| Revolutions per mile (km) | 592.01 (367.86) | 616.6 (383.14) | 24.58 (15.28) 4.2% |
285/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.2 mph (30.9 km/h) |
| 25 mph (40.23 km/h) | 24 mph (38.63 km/h) |
| 30 mph (48.28 km/h) | 28.8 mph (46.36 km/h) |
| 35 mph (56.33 km/h) | 33.6 mph (54.08 km/h) |
| 40 mph (64.37 km/h) | 38.41 mph (61.81 km/h) |
| 45 mph (72.42 km/h) | 43.21 mph (69.53 km/h) |
| 50 mph (80.47 km/h) | 48.01 mph (77.26 km/h) |
| 55 mph (88.51 km/h) | 52.81 mph (84.98 km/h) |
| 60 mph (96.56 km/h) | 57.61 mph (92.71 km/h) |
| 65 mph (104.61 km/h) | 62.41 mph (100.44 km/h) |
| 70 mph (112.65 km/h) | 67.21 mph (108.16 km/h) |
| 75 mph (120.7 km/h) | 72.01 mph (115.89 km/h) |
| 80 mph (128.75 km/h) | 76.81 mph (123.61 km/h) |
| 85 mph (136.79 km/h) | 81.61 mph (131.34 km/h) |
| 90 mph (144.84 km/h) | 86.41 mph (139.07 km/h) |
| 95 mph (152.89 km/h) | 91.21 mph (146.79 km/h) |
| 100 mph (160.93 km/h) | 96.01 mph (154.52 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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