Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/70-18 | 285/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.06 (814.2) | 33.71 (856.2) | 1.65 (42) 5.2% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 100.7 (2557.88) | 105.9 (2689.83) | 5.19 (131.95) 5.2% |
| Sidewall Height inches (mm) | 7.03 (178.5) | 7.85 (199.5) | 0.83 (21) 11.8% |
| Revolutions per mile (km) | 629.17 (390.95) | 598.31 (371.77) | -30.86 (-19.18) -4.9% |
285/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.03 mph (33.85 km/h) |
| 25 mph (40.23 km/h) | 26.29 mph (42.31 km/h) |
| 30 mph (48.28 km/h) | 31.55 mph (50.77 km/h) |
| 35 mph (56.33 km/h) | 36.81 mph (59.23 km/h) |
| 40 mph (64.37 km/h) | 42.06 mph (67.69 km/h) |
| 45 mph (72.42 km/h) | 47.32 mph (76.16 km/h) |
| 50 mph (80.47 km/h) | 52.58 mph (84.62 km/h) |
| 55 mph (88.51 km/h) | 57.84 mph (93.08 km/h) |
| 60 mph (96.56 km/h) | 63.1 mph (101.54 km/h) |
| 65 mph (104.61 km/h) | 68.35 mph (110 km/h) |
| 70 mph (112.65 km/h) | 73.61 mph (118.47 km/h) |
| 75 mph (120.7 km/h) | 78.87 mph (126.93 km/h) |
| 80 mph (128.75 km/h) | 84.13 mph (135.39 km/h) |
| 85 mph (136.79 km/h) | 89.38 mph (143.85 km/h) |
| 90 mph (144.84 km/h) | 94.64 mph (152.31 km/h) |
| 95 mph (152.89 km/h) | 99.9 mph (160.77 km/h) |
| 100 mph (160.93 km/h) | 105.16 mph (169.24 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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