Tyre repair 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 Inspection is vital - if you have any doubts about whether or not a tyre should be repaired, do not repair it