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What Is the Minimum Allowable Tread Depth for Steer Tires? | Pass The Next Inspection

For trucks, buses, and truck tractors, front steering tires need at least 4/32 inch of tread in a major groove. If you run commercial equipment, this question has a clean answer. The minimum allowable tread depth for steer tires under federal rules is 4/32 inch. That reading applies to the front wheels of a bus,

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