Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/70-18 | 285/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.5 (800.2) | 33.71 (856.2) | 2.2 (56) 7% |
| Width inches (mm) | 9.65 (245) | 11.22 (285) | 1.57 (40) 16.3% |
| Circum. inches (mm) | 98.97 (2513.9) | 105.9 (2689.83) | 6.93 (175.93) 7% |
| Sidewall Height inches (mm) | 6.75 (171.5) | 7.85 (199.5) | 1.1 (28) 16.3% |
| Revolutions per mile (km) | 640.18 (397.79) | 598.31 (371.77) | -41.87 (-26.02) -6.5% |
285/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.4 mph (34.44 km/h) |
| 25 mph (40.23 km/h) | 26.75 mph (43.05 km/h) |
| 30 mph (48.28 km/h) | 32.1 mph (51.66 km/h) |
| 35 mph (56.33 km/h) | 37.45 mph (60.27 km/h) |
| 40 mph (64.37 km/h) | 42.8 mph (68.88 km/h) |
| 45 mph (72.42 km/h) | 48.15 mph (77.49 km/h) |
| 50 mph (80.47 km/h) | 53.5 mph (86.1 km/h) |
| 55 mph (88.51 km/h) | 58.85 mph (94.71 km/h) |
| 60 mph (96.56 km/h) | 64.2 mph (103.32 km/h) |
| 65 mph (104.61 km/h) | 69.55 mph (111.93 km/h) |
| 70 mph (112.65 km/h) | 74.9 mph (120.54 km/h) |
| 75 mph (120.7 km/h) | 80.25 mph (129.15 km/h) |
| 80 mph (128.75 km/h) | 85.6 mph (137.76 km/h) |
| 85 mph (136.79 km/h) | 90.95 mph (146.37 km/h) |
| 90 mph (144.84 km/h) | 96.3 mph (154.98 km/h) |
| 95 mph (152.89 km/h) | 101.65 mph (163.59 km/h) |
| 100 mph (160.93 km/h) | 107 mph (172.2 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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