Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-19 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.2 (640.1) | 34.83 (884.7) | 9.63 (244.6) 38.2% |
| Width inches (mm) | 12.4 (315) | 11.22 (285) | -1.18 (-30) -9.5% |
| Circum. inches (mm) | 79.17 (2010.93) | 109.42 (2779.37) | 30.25 (768.43) 38.2% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 8.42 (213.75) | 5.31 (135) 171.4% |
| Revolutions per mile (km) | 800.3 (497.28) | 579.03 (359.79) | -221.26 (-137.49) -27.6% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.64 mph (44.49 km/h) |
| 25 mph (40.23 km/h) | 34.55 mph (55.61 km/h) |
| 30 mph (48.28 km/h) | 41.46 mph (66.73 km/h) |
| 35 mph (56.33 km/h) | 48.37 mph (77.85 km/h) |
| 40 mph (64.37 km/h) | 55.29 mph (88.97 km/h) |
| 45 mph (72.42 km/h) | 62.2 mph (100.09 km/h) |
| 50 mph (80.47 km/h) | 69.11 mph (111.22 km/h) |
| 55 mph (88.51 km/h) | 76.02 mph (122.34 km/h) |
| 60 mph (96.56 km/h) | 82.93 mph (133.46 km/h) |
| 65 mph (104.61 km/h) | 89.84 mph (144.58 km/h) |
| 70 mph (112.65 km/h) | 96.75 mph (155.7 km/h) |
| 75 mph (120.7 km/h) | 103.66 mph (166.82 km/h) |
| 80 mph (128.75 km/h) | 110.57 mph (177.95 km/h) |
| 85 mph (136.79 km/h) | 117.48 mph (189.07 km/h) |
| 90 mph (144.84 km/h) | 124.39 mph (200.19 km/h) |
| 95 mph (152.89 km/h) | 131.3 mph (211.31 km/h) |
| 100 mph (160.93 km/h) | 138.21 mph (222.43 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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