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| 4. Tread depth. A tire is not in safe operating condition if | | it is worn to the point where less than 2/32 inch of tread | | design remains at all points at which gauge readings are | | required. Tread depth must be measured as follows. |
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| | | A. Tire tread depth must be measured by a tread depth | | gauge that is calibrated in 1/32 inch. |
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| | | B. Readings must be taken in 2 adjacent major tread | | grooves at 2 points in each of the grooves not closer than | | 15 inches. |
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| | | C. Readings for a tire that has the tread design running | | across the tire or for a siped tire must be taken at or | | near the center of the tire at 2 points of the | | circumference not closer than 15 inches. |
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| | | 5. Exemptions. A farm vehicle used exclusively for | | agricultural purposes, including, but not limited to, a self- | | propelled combine, self-propelled corn and hay harvesting | | machine or tractor used exclusively for agricultural purposes, | | is exempt from this section. |
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| | | 6.__Wheels.__If the rim size has been altered, the overall | | diameter of the wheel with the tire must be within the vehicle | | manufacturer's specifications. |
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| | | This bill codifies 2 rules that are currently found in the | | Department of Public Safety, Bureau of State Police's "Maine | | Motor Vehicle Inspection Manual." This bill requires vehicles | | to have tires that meet or exceed the load and speed rating of | | the original equipment tires. This bill also requires the | | overall diameter of a wheel, with the tire, that has an | | altered rim to be within the vehicle manufacturer's | | specifications. |
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