One of the leading causes of tire failure and casing rejection during the retread
process is a faulty repair. This area is most often overlooked when fleets design
tire maintenance programs, but as a recent survey from the monthly magazine Tire
Business indicates, 46% of tire failures were caused by improper repair procedures.
Of course this means higher tire costs.
When a radial tire has been damaged to the point where the steel cords are exposed
to the elements it is important that the area be repaired as soon as possible so
that moisture is not allowed to migrate along the belt package causing further damage.
The most effective method of repair for nail holes (1/4") is the plug and patch repair.
The plug stops the migration of moisture and the patch on the inside of the tire
supports the plug. For repairs larger than a nail hole (3/8" and larger) the tire
should be removed from service.
This method of repair not only reduces the number of tire failures but promotes casing
recovery as well.