Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 285/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 33.71 (856.2) | 3.31 (84) 10.9% |
| Width inches (mm) | 6.89 (175) | 11.22 (285) | 4.33 (110) 62.9% |
| Circum. inches (mm) | 95.51 (2425.94) | 105.9 (2689.83) | 10.39 (263.89) 10.9% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 7.85 (199.5) | 1.65 (42) 26.7% |
| Revolutions per mile (km) | 663.39 (412.21) | 598.31 (371.77) | -65.08 (-40.44) -9.8% |
285/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.18 mph (35.69 km/h) |
| 25 mph (40.23 km/h) | 27.72 mph (44.61 km/h) |
| 30 mph (48.28 km/h) | 33.26 mph (53.53 km/h) |
| 35 mph (56.33 km/h) | 38.81 mph (62.45 km/h) |
| 40 mph (64.37 km/h) | 44.35 mph (71.38 km/h) |
| 45 mph (72.42 km/h) | 49.9 mph (80.3 km/h) |
| 50 mph (80.47 km/h) | 55.44 mph (89.22 km/h) |
| 55 mph (88.51 km/h) | 60.98 mph (98.14 km/h) |
| 60 mph (96.56 km/h) | 66.53 mph (107.06 km/h) |
| 65 mph (104.61 km/h) | 72.07 mph (115.99 km/h) |
| 70 mph (112.65 km/h) | 77.61 mph (124.91 km/h) |
| 75 mph (120.7 km/h) | 83.16 mph (133.83 km/h) |
| 80 mph (128.75 km/h) | 88.7 mph (142.75 km/h) |
| 85 mph (136.79 km/h) | 94.25 mph (151.68 km/h) |
| 90 mph (144.84 km/h) | 99.79 mph (160.6 km/h) |
| 95 mph (152.89 km/h) | 105.33 mph (169.52 km/h) |
| 100 mph (160.93 km/h) | 110.88 mph (178.44 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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