Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 270/75-18 | 285/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.94 (862.2) | 33.71 (856.2) | -0.24 (-6) -0.7% |
| Width inches (mm) | 10.63 (270) | 11.22 (285) | 0.59 (15) 5.6% |
| Circum. inches (mm) | 106.64 (2708.68) | 105.9 (2689.83) | -0.74 (-18.85) -0.7% |
| Sidewall Height inches (mm) | 7.97 (202.5) | 7.85 (199.5) | -0.12 (-3) -1.5% |
| Revolutions per mile (km) | 594.14 (369.18) | 598.31 (371.77) | 4.16 (2.59) 0.7% |
285/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.86 mph (31.96 km/h) |
| 25 mph (40.23 km/h) | 24.83 mph (39.95 km/h) |
| 30 mph (48.28 km/h) | 29.79 mph (47.94 km/h) |
| 35 mph (56.33 km/h) | 34.76 mph (55.94 km/h) |
| 40 mph (64.37 km/h) | 39.72 mph (63.93 km/h) |
| 45 mph (72.42 km/h) | 44.69 mph (71.92 km/h) |
| 50 mph (80.47 km/h) | 49.65 mph (79.91 km/h) |
| 55 mph (88.51 km/h) | 54.62 mph (87.9 km/h) |
| 60 mph (96.56 km/h) | 59.58 mph (95.89 km/h) |
| 65 mph (104.61 km/h) | 64.55 mph (103.88 km/h) |
| 70 mph (112.65 km/h) | 69.51 mph (111.87 km/h) |
| 75 mph (120.7 km/h) | 74.48 mph (119.86 km/h) |
| 80 mph (128.75 km/h) | 79.44 mph (127.85 km/h) |
| 85 mph (136.79 km/h) | 84.41 mph (135.84 km/h) |
| 90 mph (144.84 km/h) | 89.37 mph (143.83 km/h) |
| 95 mph (152.89 km/h) | 94.34 mph (151.82 km/h) |
| 100 mph (160.93 km/h) | 99.3 mph (159.81 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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