Practice question

According to Chinese motor vehicle inspection standards (GB 7258 / GA 1026), what is the minimum legal tire tread depth for two-wheeled and three-wheeled motorcycles on public roads?

  1. Not less than 8.0 mm across all tire sizes
  2. 0.1 mm, as long as internal steel cords or fabric ply layers are not visibly exposed
  3. Tread depth has no legal minimum limit provided the tire holds air pressure
  4. Not less than 1.6 mm (or until the tread reaches the built-in Tread Wear Indicator / TWI bars in the grooves)

Answer: D — Not less than 1.6 mm (or until the tread reaches the built-in Tread Wear Indicator / TWI bars in the grooves)

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