Damage to tyres is not necessarily irreversible and when damage is only to the rubber, the tyre can be repaired instead of withdrawing it from service.
A strict specification
Checking tyres on aregular basis helps identify abnormal wear or damage before it gets out of hand. Wear, when it is identified at an early stage, can be compensated by tyre rotation or turn on rim. As such, the tyre remains in service and will find more regular wear in the long term. Damage can be more or less severe depending on the position, depth and the time that has elapsed since it first appeared. In any case, the tyre must be removed and entrusted to a specialist. Only a specialist will be to establish a complete diagnosis and determine whether it is possible to repair the tyre or not. He will start by checking the complete tyre, including the interior. Indeed, the damage observed may be the cause or the result of other damage. If there is a slow puncture, for example, the tyre has been run under-inflated, which may cause mottling of the inner rubber, in which case the tyre can no longer be repaired. In general, if the casing integrity is compromised, the tyre must be withdrawn from service.
In the case of a hole or deep cut, dirt or moisture may penetrate inside the tyre envelope and attack the casing. Several types of damage can leave tyres beyond repair, particularly damage sustained to the core, bundle or metal plies, damage caused by arc welding, a corrosive or greasy product,and damage to the rubberor ply separation.
When damage only affects the rubber, and has not spread, the tyre can be accepted for repair. For safety reasons, this operation must be carried out exclusively by a tyre professional. The technician will measure the size of the damage to prepare the appropriate rubber patch. After removing the envelope, he will apply it to the tyre which is then put in a special press for vulcanisation. Once the repair completed, the tyre can return to service, as if it had never suffered any damage.