Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/70-18 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.81 (884.2) | 34.83 (884.7) | 0.02 (0.5) 0.1% |
| Width inches (mm) | 12.01 (305) | 11.22 (285) | -0.79 (-20) -6.6% |
| Circum. inches (mm) | 109.36 (2777.8) | 109.42 (2779.37) | 0.06 (1.57) 0.1% |
| Sidewall Height inches (mm) | 8.41 (213.5) | 8.42 (213.75) | 0.01 (0.25) 0.1% |
| Revolutions per mile (km) | 579.36 (360) | 579.03 (359.79) | -0.33 (-0.2) -0.1% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.01 mph (32.21 km/h) |
| 25 mph (40.23 km/h) | 25.01 mph (40.26 km/h) |
| 30 mph (48.28 km/h) | 30.02 mph (48.31 km/h) |
| 35 mph (56.33 km/h) | 35.02 mph (56.36 km/h) |
| 40 mph (64.37 km/h) | 40.02 mph (64.41 km/h) |
| 45 mph (72.42 km/h) | 45.03 mph (72.46 km/h) |
| 50 mph (80.47 km/h) | 50.03 mph (80.51 km/h) |
| 55 mph (88.51 km/h) | 55.03 mph (88.56 km/h) |
| 60 mph (96.56 km/h) | 60.03 mph (96.62 km/h) |
| 65 mph (104.61 km/h) | 65.04 mph (104.67 km/h) |
| 70 mph (112.65 km/h) | 70.04 mph (112.72 km/h) |
| 75 mph (120.7 km/h) | 75.04 mph (120.77 km/h) |
| 80 mph (128.75 km/h) | 80.05 mph (128.82 km/h) |
| 85 mph (136.79 km/h) | 85.05 mph (136.87 km/h) |
| 90 mph (144.84 km/h) | 90.05 mph (144.92 km/h) |
| 95 mph (152.89 km/h) | 95.05 mph (152.97 km/h) |
| 100 mph (160.93 km/h) | 100.06 mph (161.03 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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