Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/65-18 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.59 (827.7) | 34.83 (884.7) | 2.24 (57) 6.9% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 102.37 (2600.3) | 109.42 (2779.37) | 7.05 (179.07) 6.9% |
| Sidewall Height inches (mm) | 7.29 (185.25) | 8.42 (213.75) | 1.12 (28.5) 15.4% |
| Revolutions per mile (km) | 618.91 (384.57) | 579.03 (359.79) | -39.88 (-24.78) -6.4% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.38 mph (34.4 km/h) |
| 25 mph (40.23 km/h) | 26.72 mph (43 km/h) |
| 30 mph (48.28 km/h) | 32.07 mph (51.61 km/h) |
| 35 mph (56.33 km/h) | 37.41 mph (60.21 km/h) |
| 40 mph (64.37 km/h) | 42.75 mph (68.81 km/h) |
| 45 mph (72.42 km/h) | 48.1 mph (77.41 km/h) |
| 50 mph (80.47 km/h) | 53.44 mph (86.01 km/h) |
| 55 mph (88.51 km/h) | 58.79 mph (94.61 km/h) |
| 60 mph (96.56 km/h) | 64.13 mph (103.21 km/h) |
| 65 mph (104.61 km/h) | 69.48 mph (111.81 km/h) |
| 70 mph (112.65 km/h) | 74.82 mph (120.41 km/h) |
| 75 mph (120.7 km/h) | 80.16 mph (129.01 km/h) |
| 80 mph (128.75 km/h) | 85.51 mph (137.61 km/h) |
| 85 mph (136.79 km/h) | 90.85 mph (146.21 km/h) |
| 90 mph (144.84 km/h) | 96.2 mph (154.82 km/h) |
| 95 mph (152.89 km/h) | 101.54 mph (163.42 km/h) |
| 100 mph (160.93 km/h) | 106.89 mph (172.02 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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