Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/70-18 | 285/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.81 (884.2) | 33.71 (856.2) | -1.1 (-28) -3.2% |
| Width inches (mm) | 12.01 (305) | 11.22 (285) | -0.79 (-20) -6.6% |
| Circum. inches (mm) | 109.36 (2777.8) | 105.9 (2689.83) | -3.46 (-87.96) -3.2% |
| Sidewall Height inches (mm) | 8.41 (213.5) | 7.85 (199.5) | -0.55 (-14) -6.6% |
| Revolutions per mile (km) | 579.36 (360) | 598.31 (371.77) | 18.95 (11.77) 3.3% |
285/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.37 mph (31.17 km/h) |
| 25 mph (40.23 km/h) | 24.21 mph (38.96 km/h) |
| 30 mph (48.28 km/h) | 29.05 mph (46.75 km/h) |
| 35 mph (56.33 km/h) | 33.89 mph (54.54 km/h) |
| 40 mph (64.37 km/h) | 38.73 mph (62.34 km/h) |
| 45 mph (72.42 km/h) | 43.57 mph (70.13 km/h) |
| 50 mph (80.47 km/h) | 48.42 mph (77.92 km/h) |
| 55 mph (88.51 km/h) | 53.26 mph (85.71 km/h) |
| 60 mph (96.56 km/h) | 58.1 mph (93.5 km/h) |
| 65 mph (104.61 km/h) | 62.94 mph (101.29 km/h) |
| 70 mph (112.65 km/h) | 67.78 mph (109.09 km/h) |
| 75 mph (120.7 km/h) | 72.62 mph (116.88 km/h) |
| 80 mph (128.75 km/h) | 77.47 mph (124.67 km/h) |
| 85 mph (136.79 km/h) | 82.31 mph (132.46 km/h) |
| 90 mph (144.84 km/h) | 87.15 mph (140.25 km/h) |
| 95 mph (152.89 km/h) | 91.99 mph (148.05 km/h) |
| 100 mph (160.93 km/h) | 96.83 mph (155.84 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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