Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/50-20 | 285/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.43 (773) | 32.71 (830.8) | 2.28 (57.8) 7.5% |
| Width inches (mm) | 10.43 (265) | 11.22 (285) | 0.79 (20) 7.5% |
| Circum. inches (mm) | 95.61 (2428.45) | 102.76 (2610.04) | 7.15 (181.58) 7.5% |
| Sidewall Height inches (mm) | 5.22 (132.5) | 7.85 (199.5) | 2.64 (67) 50.6% |
| Revolutions per mile (km) | 662.7 (411.78) | 616.6 (383.14) | -46.11 (-28.65) -7% |
285/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.5 mph (34.59 km/h) |
| 25 mph (40.23 km/h) | 26.87 mph (43.24 km/h) |
| 30 mph (48.28 km/h) | 32.24 mph (51.89 km/h) |
| 35 mph (56.33 km/h) | 37.62 mph (60.54 km/h) |
| 40 mph (64.37 km/h) | 42.99 mph (69.19 km/h) |
| 45 mph (72.42 km/h) | 48.36 mph (77.84 km/h) |
| 50 mph (80.47 km/h) | 53.74 mph (86.48 km/h) |
| 55 mph (88.51 km/h) | 59.11 mph (95.13 km/h) |
| 60 mph (96.56 km/h) | 64.49 mph (103.78 km/h) |
| 65 mph (104.61 km/h) | 69.86 mph (112.43 km/h) |
| 70 mph (112.65 km/h) | 75.23 mph (121.08 km/h) |
| 75 mph (120.7 km/h) | 80.61 mph (129.73 km/h) |
| 80 mph (128.75 km/h) | 85.98 mph (138.37 km/h) |
| 85 mph (136.79 km/h) | 91.36 mph (147.02 km/h) |
| 90 mph (144.84 km/h) | 96.73 mph (155.67 km/h) |
| 95 mph (152.89 km/h) | 102.1 mph (164.32 km/h) |
| 100 mph (160.93 km/h) | 107.48 mph (172.97 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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