Michelin, a leading tire manufacturer, provides guidance on the repairability of their run-flat tires. According to their information, Michelin run-flat tires can be repaired in certain circumstances, but the process must be done properly by a professional tire technician.
Repairing Michelin Run-Flat Tires
Criteria for Repairable Tires
Michelin states that a run-flat tire may be repaired if the following criteria are met:
The tire has not been driven on when flat.
The damage is only on the tread section of the tire (sidewall damage cannot be repaired).
The puncture is no greater than 1/4 inch in size.
Proper Repair Procedure
Michelin emphasizes that the proper way to repair a run-flat tire is to patch the tire from the inside, not simply plug the puncture. The tire must be removed from the wheel for a full inspection before any repair is made. Plug-type repairs done without removing the tire are considered improper and can result in an accident.
Limitations on Repairs
Michelin notes that not all run-flat tires can be repaired. Some models may explicitly state that they cannot be repaired, and Michelin recommends getting professional advice before attempting any repairs.