Guidance summary
Apply the large-vehicle tread requirement
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Large vehicles and passenger-carrying vehicles require at least 1 mm tread across three-quarters of the tread breadth in a continuous band around the whole circumference. The separate car and light-van standard is 1.6 mm across the central three-quarters. Check the correct vehicle category as well as damage and pressure; a legal minimum is not a target to wear down to.
Source: Apply the large-vehicle tread requirement
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