Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/75-17 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.83 (859.3) | 34.83 (884.7) | 1 (25.4) 3% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 106.28 (2699.57) | 109.42 (2779.37) | 3.14 (79.8) 3% |
| Sidewall Height inches (mm) | 8.42 (213.75) | 8.42 (213.75) | 0 (0) 0% |
| Revolutions per mile (km) | 596.15 (370.43) | 579.03 (359.79) | -17.12 (-10.64) -2.9% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.59 mph (33.14 km/h) |
| 25 mph (40.23 km/h) | 25.74 mph (41.42 km/h) |
| 30 mph (48.28 km/h) | 30.89 mph (49.71 km/h) |
| 35 mph (56.33 km/h) | 36.03 mph (57.99 km/h) |
| 40 mph (64.37 km/h) | 41.18 mph (66.28 km/h) |
| 45 mph (72.42 km/h) | 46.33 mph (74.56 km/h) |
| 50 mph (80.47 km/h) | 51.48 mph (82.85 km/h) |
| 55 mph (88.51 km/h) | 56.63 mph (91.13 km/h) |
| 60 mph (96.56 km/h) | 61.77 mph (99.42 km/h) |
| 65 mph (104.61 km/h) | 66.92 mph (107.7 km/h) |
| 70 mph (112.65 km/h) | 72.07 mph (115.98 km/h) |
| 75 mph (120.7 km/h) | 77.22 mph (124.27 km/h) |
| 80 mph (128.75 km/h) | 82.36 mph (132.55 km/h) |
| 85 mph (136.79 km/h) | 87.51 mph (140.84 km/h) |
| 90 mph (144.84 km/h) | 92.66 mph (149.12 km/h) |
| 95 mph (152.89 km/h) | 97.81 mph (157.41 km/h) |
| 100 mph (160.93 km/h) | 102.96 mph (165.69 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1474 | 1712 | 1843 | 1925 | 2013 | 2075 | 2144 | 2226 | 2339 | 2452 | 2577 | 2677 | 2859 | 3060 | 3217 | 3317 | 3373 | 3580 | 3869 | 4496 |
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