Never use a tube in a tubeless tire as a substitute for a proper repair. Individual tire manufacturers may differ on whether the speed category applies to speed-rated tires that have been repaired. Consult the tire manufacturer for recommendations. No repairs to the sidewall of a tire should be made without consulting the tire manufacturer. After a tire has been repaired, check for leaks or other damage not detected at the time of repair.
Improper repairs can cause sudden tire failure.
Air loss due to punctures can ruin tires that might have been saved had they been removed in time for proper repair. Gradual air loss raises a tire's operating temperature. This can cause some of the components to separate, or damage the tire body in ways that create rapid or sudden air loss. Such internal damage may not always be readily apparent, and rapid loss of air may still occur despite later installation of a proper repair.