Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/70-18 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.71 (856.2) | 34.83 (884.7) | 1.12 (28.5) 3.3% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 105.9 (2689.83) | 109.42 (2779.37) | 3.53 (89.54) 3.3% |
| Sidewall Height inches (mm) | 7.85 (199.5) | 8.42 (213.75) | 0.56 (14.25) 7.1% |
| Revolutions per mile (km) | 598.31 (371.77) | 579.03 (359.79) | -19.27 (-11.98) -3.2% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.67 mph (33.26 km/h) |
| 25 mph (40.23 km/h) | 25.83 mph (41.57 km/h) |
| 30 mph (48.28 km/h) | 31 mph (49.89 km/h) |
| 35 mph (56.33 km/h) | 36.17 mph (58.2 km/h) |
| 40 mph (64.37 km/h) | 41.33 mph (66.52 km/h) |
| 45 mph (72.42 km/h) | 46.5 mph (74.83 km/h) |
| 50 mph (80.47 km/h) | 51.66 mph (83.15 km/h) |
| 55 mph (88.51 km/h) | 56.83 mph (91.46 km/h) |
| 60 mph (96.56 km/h) | 62 mph (99.78 km/h) |
| 65 mph (104.61 km/h) | 67.16 mph (108.09 km/h) |
| 70 mph (112.65 km/h) | 72.33 mph (116.4 km/h) |
| 75 mph (120.7 km/h) | 77.5 mph (124.72 km/h) |
| 80 mph (128.75 km/h) | 82.66 mph (133.03 km/h) |
| 85 mph (136.79 km/h) | 87.83 mph (141.35 km/h) |
| 90 mph (144.84 km/h) | 93 mph (149.66 km/h) |
| 95 mph (152.89 km/h) | 98.16 mph (157.98 km/h) |
| 100 mph (160.93 km/h) | 103.33 mph (166.29 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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