Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/70-18 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 34.83 (884.7) | 2.22 (56.5) 6.8% |
| Width inches (mm) | 10.43 (265) | 11.22 (285) | 0.79 (20) 7.5% |
| Circum. inches (mm) | 102.44 (2601.87) | 109.42 (2779.37) | 6.99 (177.5) 6.8% |
| Sidewall Height inches (mm) | 7.3 (185.5) | 8.42 (213.75) | 1.11 (28.25) 15.2% |
| Revolutions per mile (km) | 618.53 (384.34) | 579.03 (359.79) | -39.5 (-24.55) -6.4% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.36 mph (34.38 km/h) |
| 25 mph (40.23 km/h) | 26.71 mph (42.98 km/h) |
| 30 mph (48.28 km/h) | 32.05 mph (51.57 km/h) |
| 35 mph (56.33 km/h) | 37.39 mph (60.17 km/h) |
| 40 mph (64.37 km/h) | 42.73 mph (68.77 km/h) |
| 45 mph (72.42 km/h) | 48.07 mph (77.36 km/h) |
| 50 mph (80.47 km/h) | 53.41 mph (85.96 km/h) |
| 55 mph (88.51 km/h) | 58.75 mph (94.55 km/h) |
| 60 mph (96.56 km/h) | 64.09 mph (103.15 km/h) |
| 65 mph (104.61 km/h) | 69.43 mph (111.74 km/h) |
| 70 mph (112.65 km/h) | 74.78 mph (120.34 km/h) |
| 75 mph (120.7 km/h) | 80.12 mph (128.94 km/h) |
| 80 mph (128.75 km/h) | 85.46 mph (137.53 km/h) |
| 85 mph (136.79 km/h) | 90.8 mph (146.13 km/h) |
| 90 mph (144.84 km/h) | 96.14 mph (154.72 km/h) |
| 95 mph (152.89 km/h) | 101.48 mph (163.32 km/h) |
| 100 mph (160.93 km/h) | 106.82 mph (171.91 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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