Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-18 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.35 (847.2) | 34.83 (884.7) | 1.48 (37.5) 4.4% |
| Width inches (mm) | 12.8 (325) | 11.22 (285) | -1.57 (-40) -12.3% |
| Circum. inches (mm) | 104.79 (2661.56) | 109.42 (2779.37) | 4.64 (117.81) 4.4% |
| Sidewall Height inches (mm) | 7.68 (195) | 8.42 (213.75) | 0.74 (18.75) 9.6% |
| Revolutions per mile (km) | 604.66 (375.72) | 579.03 (359.79) | -25.63 (-15.93) -4.2% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.89 mph (33.61 km/h) |
| 25 mph (40.23 km/h) | 26.11 mph (42.01 km/h) |
| 30 mph (48.28 km/h) | 31.33 mph (50.42 km/h) |
| 35 mph (56.33 km/h) | 36.55 mph (58.82 km/h) |
| 40 mph (64.37 km/h) | 41.77 mph (67.22 km/h) |
| 45 mph (72.42 km/h) | 46.99 mph (75.63 km/h) |
| 50 mph (80.47 km/h) | 52.21 mph (84.03 km/h) |
| 55 mph (88.51 km/h) | 57.43 mph (92.43 km/h) |
| 60 mph (96.56 km/h) | 62.66 mph (100.83 km/h) |
| 65 mph (104.61 km/h) | 67.88 mph (109.24 km/h) |
| 70 mph (112.65 km/h) | 73.1 mph (117.64 km/h) |
| 75 mph (120.7 km/h) | 78.32 mph (126.04 km/h) |
| 80 mph (128.75 km/h) | 83.54 mph (134.45 km/h) |
| 85 mph (136.79 km/h) | 88.76 mph (142.85 km/h) |
| 90 mph (144.84 km/h) | 93.98 mph (151.25 km/h) |
| 95 mph (152.89 km/h) | 99.21 mph (159.66 km/h) |
| 100 mph (160.93 km/h) | 104.43 mph (168.06 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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