Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/65-18 | 285/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.59 (827.7) | 33.71 (856.2) | 1.12 (28.5) 3.4% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 102.37 (2600.3) | 105.9 (2689.83) | 3.53 (89.54) 3.4% |
| Sidewall Height inches (mm) | 7.29 (185.25) | 7.85 (199.5) | 0.56 (14.25) 7.7% |
| Revolutions per mile (km) | 618.91 (384.57) | 598.31 (371.77) | -20.6 (-12.8) -3.3% |
285/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.69 mph (33.3 km/h) |
| 25 mph (40.23 km/h) | 25.86 mph (41.62 km/h) |
| 30 mph (48.28 km/h) | 31.03 mph (49.94 km/h) |
| 35 mph (56.33 km/h) | 36.21 mph (58.27 km/h) |
| 40 mph (64.37 km/h) | 41.38 mph (66.59 km/h) |
| 45 mph (72.42 km/h) | 46.55 mph (74.91 km/h) |
| 50 mph (80.47 km/h) | 51.72 mph (83.24 km/h) |
| 55 mph (88.51 km/h) | 56.89 mph (91.56 km/h) |
| 60 mph (96.56 km/h) | 62.07 mph (99.89 km/h) |
| 65 mph (104.61 km/h) | 67.24 mph (108.21 km/h) |
| 70 mph (112.65 km/h) | 72.41 mph (116.53 km/h) |
| 75 mph (120.7 km/h) | 77.58 mph (124.86 km/h) |
| 80 mph (128.75 km/h) | 82.75 mph (133.18 km/h) |
| 85 mph (136.79 km/h) | 87.93 mph (141.5 km/h) |
| 90 mph (144.84 km/h) | 93.1 mph (149.83 km/h) |
| 95 mph (152.89 km/h) | 98.27 mph (158.15 km/h) |
| 100 mph (160.93 km/h) | 103.44 mph (166.48 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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