Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-18 | 285/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.07 (814.7) | 33.71 (856.2) | 1.63 (41.5) 5.1% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 100.77 (2559.46) | 105.9 (2689.83) | 5.13 (130.38) 5.1% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 7.85 (199.5) | 0.82 (20.75) 11.6% |
| Revolutions per mile (km) | 628.78 (390.71) | 598.31 (371.77) | -30.48 (-18.94) -4.8% |
285/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.02 mph (33.83 km/h) |
| 25 mph (40.23 km/h) | 26.27 mph (42.28 km/h) |
| 30 mph (48.28 km/h) | 31.53 mph (50.74 km/h) |
| 35 mph (56.33 km/h) | 36.78 mph (59.2 km/h) |
| 40 mph (64.37 km/h) | 42.04 mph (67.65 km/h) |
| 45 mph (72.42 km/h) | 47.29 mph (76.11 km/h) |
| 50 mph (80.47 km/h) | 52.55 mph (84.57 km/h) |
| 55 mph (88.51 km/h) | 57.8 mph (93.02 km/h) |
| 60 mph (96.56 km/h) | 63.06 mph (101.48 km/h) |
| 65 mph (104.61 km/h) | 68.31 mph (109.94 km/h) |
| 70 mph (112.65 km/h) | 73.57 mph (118.39 km/h) |
| 75 mph (120.7 km/h) | 78.82 mph (126.85 km/h) |
| 80 mph (128.75 km/h) | 84.08 mph (135.31 km/h) |
| 85 mph (136.79 km/h) | 89.33 mph (143.76 km/h) |
| 90 mph (144.84 km/h) | 94.58 mph (152.22 km/h) |
| 95 mph (152.89 km/h) | 99.84 mph (160.68 km/h) |
| 100 mph (160.93 km/h) | 105.09 mph (169.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1523 | 1769 | 1905 | 1989 | 2080 | 2145 | 2216 | 2300 | 2417 | 2533 | 2663 | 2767 | 2954 | 3162 | 3324 | 3427 | 3486 | 3700 | 3998 | 4645 |
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