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Tire Repair

Jose
Updated

This bulletin from Continental Tire emphasizes that only trained tire specialists should inspect and repair passenger and light truck tires, following national standards. Improper repairs may cause tire failure, injury, or death, and void warranties. SSR tires should not be repaired, while ContiSeal and ContiSilent tires require specialist inspection for permanent repairs. Regular tire inspections are strongly advised.

Product Service Information Bulletin PSIB 05 – 01
Tire Repair for Passenger Car and Light Truck Tires

⚠ Safety Warning

Serious injury or death may result from a tire disablement, such as by tread-belt separation and/or detachment, that is caused by failing to observe the following safety and maintenance information.

During its service life, a tire undergoes a variety of different usage conditions and can be damaged in many different ways. This damage can result from punctures, impacts, cuts, etc. Tire damage can reduce a tire's structural integrity by, for example:

  • Air loss resulting in underinflated service conditions which lead to internal structural damage;
  • Direct damage to tire components such as rubber and plies;
  • Exposure of internal materials to the outside environment and resulting degradation; and/or
  • Exposure of internal materials to pressurized air (Intra-carcass pressurization).

For these reasons, tires should be regularly inspected by the consumer. An inspection of the tires should also be incorporated during routine vehicle maintenance procedures. If tire damage is suspected or found, it should be carefully assessed by a trained tire specialist immediately.

A consumer should never repair a damaged tire. Only a trained tire specialist who can base their assessment on a thorough and comprehensive inspection of the specific tire can determine whether an individual tire is suitable for repair or should be removed from service. This assessment should also take into account the complete service life history of the tire including inflation, load, and operating conditions. If the trained tire specialist decides to repair the tire, then they should strictly follow all appropriate national tire industry repair standards regarding the inspection process and repair procedures. Continental Tire The Americas, LLC is not responsible for the specialist’s decisions or the repaired tire. Continental Tire The Americas, LLC advises that an improper repair to one of its tires invalidates the manufacturer’s warranty. National tire industry standards for the U.S. and Canada are defined and published by the U.S. Tire Manufacturers Association.

⚠ WARNING:

Improperly repaired tires can fail while in service, such as by tread-belt separation and/or detachment, which may result in an accident causing serious injury and/or death.

ONLY SPECIALLY TRAINED PERSONNEL USING THE PROPER TOOLS AND PROCEDURES SHOULD REPAIR TIRES.

  • NEVER repair tires worn to the tire’s tread wear indicators or to 2/32” remaining tread depth in any area of the tread.
  • NEVER perform a tire repair without removing the tire from the rim/wheel assembly for internal inspection. (DO NOT perform an outside-in tire repair or on-the-wheel repair). It is essential that only a specially trained person remove any tire from the wheel when it has been damaged or is losing air. A thorough inspection for any internal damage can then be made.
  • NEVER use only a plug or NEVER use only a patch to repair a puncture. The injury must be completely filled with a suitable vulcanizing material or rubber stem, and a patch must be applied to the inner liner to prevent air loss.
  • NEVER repair a tire that has an existing, improper repair (non-RMA repair); the tire must be scrapped.
  • NEVER substitute an inner tube for a proper repair or to remedy an improper repair.
  • NEVER invert radial tires. (Avoid excessive spreading of the tire or tire beads.)
  • NEVER buff the tire inner liner too deep, exposing the tire casing body (ply) cords. If this type of damage occurs during buffing, the tire must be scrapped.

Puncture Injury Limits:

¼” (6mm) for Passenger and Light Truck tires (through Load Range E).punture area.png

  • This graphic indicates that puncture repairs are limited to the tread area as generally depicted in the graphic.
  • DO NOT make repairs where the injury damage extends into the shoulder/belt edge area OR where the injury extends at an angle into the shoulder area.

  • If there is any question that the injury extends into the shoulder/ belt edge area, then the tire must be scrapped.

    For more information, a complete overview about the applicable standards and latest updates please contact the U.S. Tire Manufacturers Association (USTMA). www.ustires.org

SSR Tire Owners:

Even a trained tire specialist may be unable to recognize internal structural damage to a Self-Supporting Run flat (SSR) tire resulting from having been driven in an underinflated or zero inflation pressure condition. Such damage may not be visible on the surface of the inner liner or sidewall, making it impossible to determine the tire’s suitability for repair or reuse. CONTINENTAL TIRE THE AMERICAS, LLC does not recommend any repair to or reuse of SSR tires.

ContiSeal™ Tire Owners:

A tacky viscous sealant was uniformly applied from shoulder to shoulder along the inner liner in the tread area of your ContiSeal tire. When an object penetrates the tread of a ContiSeal tire, the thick, viscous sealant is designed to surround the puncturing object and minimize air loss in the tire. When the puncturing object is dislodged from the tire, the sealant is designed to fill and seal most holes up to 3/16” in diameter. The sealant is not designed or intended to act as a permanent puncture repair. Regularly inspect ContiSeal tires for evidence of sealed cuts and punctures and for loss of inflation pressure. Punctures can result in loss of inflation pressure, which can damage the tire prior to activation of the sealant properties. ContiSeal tires with sealed cuts and punctures should be inspected by a trained tire specialist as soon as possible and pursuant to the RMA puncture repair standards to determine whether the puncturing object caused excessive damage that the sealant cannot prevent; whether the loss of air inflation caused by the puncture damaged the tire; and whether a permanent repair can be made. Note that a permanent repair will require removal of the tire from the rim and application of the repair by a third party via a suitable repair method.

ContiSilent™ Tire Owners:

ContiSilent tires are designed to reduce noise generated while driving. A ContiSilent tire is lined with a noise-reducing foam insert. It is not designed or intended to act as a puncture repair.

Using ContiSilent Tires: In aspects such as mounting, demounting, inflating, and balancing, ContiSilent tires do not differ from non-ContiSilent tires. As with any tire, regularly inspect ContiSilent tires for evidence of cuts, punctures, and loss of inflation pressure. At a minimum, ContiSilent tires should be inspected once or twice a month and always before a long trip. Punctures or damage not attended to promptly can result in loss of inflation pressure and/or damage to the tire. ContiSilent tires with cuts or punctures must be inspected by a trained tire specialist as soon as possible. The trained tire specialist must inspect the tire carefully and, according to industry standards, determine whether a permanent repair can be made or whether the tire must be removed from service and scrapped. A permanent repair will require removal of the tire from the rim and application of a repair method specifically approved for ContiSilent tires. ContiSilent tires are identified by a symbol on the tire sidewall. ContiSilent tires and non-ContiSilent tires may be mixed on the same vehicle.

 


 

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