Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 256/60-18 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.09 (764.4) | 34.83 (884.7) | 4.74 (120.3) 15.7% |
| Width inches (mm) | 10.08 (256) | 11.22 (285) | 1.14 (29) 11.3% |
| Circum. inches (mm) | 94.54 (2401.43) | 109.42 (2779.37) | 14.88 (377.93) 15.7% |
| Sidewall Height inches (mm) | 6.05 (153.6) | 8.42 (213.75) | 2.37 (60.15) 39.2% |
| Revolutions per mile (km) | 670.16 (416.42) | 579.03 (359.79) | -91.13 (-56.62) -13.6% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.15 mph (37.25 km/h) |
| 25 mph (40.23 km/h) | 28.93 mph (46.57 km/h) |
| 30 mph (48.28 km/h) | 34.72 mph (55.88 km/h) |
| 35 mph (56.33 km/h) | 40.51 mph (65.19 km/h) |
| 40 mph (64.37 km/h) | 46.3 mph (74.5 km/h) |
| 45 mph (72.42 km/h) | 52.08 mph (83.82 km/h) |
| 50 mph (80.47 km/h) | 57.87 mph (93.13 km/h) |
| 55 mph (88.51 km/h) | 63.66 mph (102.44 km/h) |
| 60 mph (96.56 km/h) | 69.44 mph (111.76 km/h) |
| 65 mph (104.61 km/h) | 75.23 mph (121.07 km/h) |
| 70 mph (112.65 km/h) | 81.02 mph (130.38 km/h) |
| 75 mph (120.7 km/h) | 86.8 mph (139.7 km/h) |
| 80 mph (128.75 km/h) | 92.59 mph (149.01 km/h) |
| 85 mph (136.79 km/h) | 98.38 mph (158.32 km/h) |
| 90 mph (144.84 km/h) | 104.16 mph (167.64 km/h) |
| 95 mph (152.89 km/h) | 109.95 mph (176.95 km/h) |
| 100 mph (160.93 km/h) | 115.74 mph (186.26 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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