Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/70-16 | 285/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.5 (749.4) | 33.71 (856.2) | 4.2 (106.8) 14.3% |
| Width inches (mm) | 9.65 (245) | 11.22 (285) | 1.57 (40) 16.3% |
| Circum. inches (mm) | 92.69 (2354.31) | 105.9 (2689.83) | 13.21 (335.52) 14.3% |
| Sidewall Height inches (mm) | 6.75 (171.5) | 7.85 (199.5) | 1.1 (28) 16.3% |
| Revolutions per mile (km) | 683.57 (424.75) | 598.31 (371.77) | -85.27 (-52.98) -12.5% |
285/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.85 mph (36.77 km/h) |
| 25 mph (40.23 km/h) | 28.56 mph (45.97 km/h) |
| 30 mph (48.28 km/h) | 34.28 mph (55.16 km/h) |
| 35 mph (56.33 km/h) | 39.99 mph (64.35 km/h) |
| 40 mph (64.37 km/h) | 45.7 mph (73.55 km/h) |
| 45 mph (72.42 km/h) | 51.41 mph (82.74 km/h) |
| 50 mph (80.47 km/h) | 57.13 mph (91.94 km/h) |
| 55 mph (88.51 km/h) | 62.84 mph (101.13 km/h) |
| 60 mph (96.56 km/h) | 68.55 mph (110.32 km/h) |
| 65 mph (104.61 km/h) | 74.26 mph (119.52 km/h) |
| 70 mph (112.65 km/h) | 79.98 mph (128.71 km/h) |
| 75 mph (120.7 km/h) | 85.69 mph (137.9 km/h) |
| 80 mph (128.75 km/h) | 91.4 mph (147.1 km/h) |
| 85 mph (136.79 km/h) | 97.11 mph (156.29 km/h) |
| 90 mph (144.84 km/h) | 102.83 mph (165.48 km/h) |
| 95 mph (152.89 km/h) | 108.54 mph (174.68 km/h) |
| 100 mph (160.93 km/h) | 114.25 mph (183.87 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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