Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/70-13 | 285/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.2 (589.2) | 32.71 (830.8) | 9.51 (241.6) 41% |
| Width inches (mm) | 7.28 (185) | 11.22 (285) | 3.94 (100) 54.1% |
| Circum. inches (mm) | 72.88 (1851.03) | 102.76 (2610.04) | 29.88 (759.01) 41% |
| Sidewall Height inches (mm) | 5.1 (129.5) | 7.85 (199.5) | 2.76 (70) 54.1% |
| Revolutions per mile (km) | 869.43 (540.24) | 616.6 (383.14) | -252.83 (-157.1) -29.1% |
285/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 28.2 mph (45.39 km/h) |
| 25 mph (40.23 km/h) | 35.25 mph (56.73 km/h) |
| 30 mph (48.28 km/h) | 42.3 mph (68.08 km/h) |
| 35 mph (56.33 km/h) | 49.35 mph (79.42 km/h) |
| 40 mph (64.37 km/h) | 56.4 mph (90.77 km/h) |
| 45 mph (72.42 km/h) | 63.45 mph (102.12 km/h) |
| 50 mph (80.47 km/h) | 70.5 mph (113.46 km/h) |
| 55 mph (88.51 km/h) | 77.55 mph (124.81 km/h) |
| 60 mph (96.56 km/h) | 84.6 mph (136.16 km/h) |
| 65 mph (104.61 km/h) | 91.65 mph (147.5 km/h) |
| 70 mph (112.65 km/h) | 98.7 mph (158.85 km/h) |
| 75 mph (120.7 km/h) | 105.75 mph (170.19 km/h) |
| 80 mph (128.75 km/h) | 112.8 mph (181.54 km/h) |
| 85 mph (136.79 km/h) | 119.85 mph (192.89 km/h) |
| 90 mph (144.84 km/h) | 126.9 mph (204.23 km/h) |
| 95 mph (152.89 km/h) | 133.95 mph (215.58 km/h) |
| 100 mph (160.93 km/h) | 141 mph (226.93 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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