The USTMA collectively establishes the foundation of industry policies, from which the tire manufacturers can specify their company's exact position. The USTMA is an industry association whose membership includes most major domestic and foreign manufacturers selling tires in the United States. Tire Manufacturers Association (USTMA) Policies Because of this, Tire Rack and many tire manufacturers recommend replacement of run-flat tires driven in a severely underinflated or zero pressure condition. Such damage may not be visible on the surfaces of the tire's exterior sidewalls or interior liner, making it impossible to determine tire suitability for repair or reuse. Unfortunately, when it's time to consider repair, even a trained tire specialist may be unable to confirm internal structure damage resulting from a run-flat tire having been driven in a severely underinflated or zero pressure condition. Therefore, Tire Rack recommends driving the slowest safe speed below 50 miles per hour and the shortest distance to a service provider's facility.
However, even if driven within their speed and distance limitations, driving on run-flat tires with low or no air pressure can permanently damage their internal structure, surrendering strength and durability. Most run-flat tires make a promise of temporary extended mobility at up to 50 miles per hour speeds for up to 50-mile distances in the event a puncture allows complete air pressure loss.
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