Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-18 | 285/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.07 (814.7) | 34.83 (884.7) | 2.76 (70) 8.6% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 100.77 (2559.46) | 109.42 (2779.37) | 8.66 (219.91) 8.6% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 8.42 (213.75) | 1.38 (35) 19.6% |
| Revolutions per mile (km) | 628.78 (390.71) | 579.03 (359.79) | -49.75 (-30.91) -7.9% |
285/75-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.72 mph (34.95 km/h) |
| 25 mph (40.23 km/h) | 27.15 mph (43.69 km/h) |
| 30 mph (48.28 km/h) | 32.58 mph (52.43 km/h) |
| 35 mph (56.33 km/h) | 38.01 mph (61.17 km/h) |
| 40 mph (64.37 km/h) | 43.44 mph (69.9 km/h) |
| 45 mph (72.42 km/h) | 48.87 mph (78.64 km/h) |
| 50 mph (80.47 km/h) | 54.3 mph (87.38 km/h) |
| 55 mph (88.51 km/h) | 59.73 mph (96.12 km/h) |
| 60 mph (96.56 km/h) | 65.16 mph (104.86 km/h) |
| 65 mph (104.61 km/h) | 70.58 mph (113.6 km/h) |
| 70 mph (112.65 km/h) | 76.01 mph (122.33 km/h) |
| 75 mph (120.7 km/h) | 81.44 mph (131.07 km/h) |
| 80 mph (128.75 km/h) | 86.87 mph (139.81 km/h) |
| 85 mph (136.79 km/h) | 92.3 mph (148.55 km/h) |
| 90 mph (144.84 km/h) | 97.73 mph (157.29 km/h) |
| 95 mph (152.89 km/h) | 103.16 mph (166.02 km/h) |
| 100 mph (160.93 km/h) | 108.59 mph (174.76 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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