Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/75-17 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.06 (814.3) | 34.83 (884.7) | 2.77 (70.4) 8.6% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 100.72 (2558.2) | 109.42 (2779.37) | 8.71 (221.17) 8.6% |
| Sidewall Height inches (mm) | 7.53 (191.25) | 8.42 (213.75) | 0.89 (22.5) 11.8% |
| Revolutions per mile (km) | 629.09 (390.9) | 579.03 (359.79) | -50.06 (-31.11) -8% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.73 mph (34.97 km/h) |
| 25 mph (40.23 km/h) | 27.16 mph (43.71 km/h) |
| 30 mph (48.28 km/h) | 32.59 mph (52.45 km/h) |
| 35 mph (56.33 km/h) | 38.03 mph (61.2 km/h) |
| 40 mph (64.37 km/h) | 43.46 mph (69.94 km/h) |
| 45 mph (72.42 km/h) | 48.89 mph (78.68 km/h) |
| 50 mph (80.47 km/h) | 54.32 mph (87.42 km/h) |
| 55 mph (88.51 km/h) | 59.76 mph (96.17 km/h) |
| 60 mph (96.56 km/h) | 65.19 mph (104.91 km/h) |
| 65 mph (104.61 km/h) | 70.62 mph (113.65 km/h) |
| 70 mph (112.65 km/h) | 76.05 mph (122.39 km/h) |
| 75 mph (120.7 km/h) | 81.48 mph (131.14 km/h) |
| 80 mph (128.75 km/h) | 86.92 mph (139.88 km/h) |
| 85 mph (136.79 km/h) | 92.35 mph (148.62 km/h) |
| 90 mph (144.84 km/h) | 97.78 mph (157.36 km/h) |
| 95 mph (152.89 km/h) | 103.21 mph (166.11 km/h) |
| 100 mph (160.93 km/h) | 108.65 mph (174.85 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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