The British Standard also defines limits to the location, size and number of repairs that can be carried out and makes recommendations also on the repair materials to be used.

A tyre must always be checked thoroughly before it is repaired. If the tyre displays any of the following, it should not be repaired;

  • Illegal tread depth (below 1.6mm across the central ¾ of the tyre tread throughout the entire circumference)
  • Run flat damage - breakdown of the tyre's structural integrity
  • Secondary damage - caused by the injuring object
  • Ageing/deterioration of tyre rubber
  • Bead damage
  • Exposed cords
  • Faulty/poor previous repairs

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