Which types of tyre injuries are serviceable? The answer to that question depends upon the injury itself. Every injury, including punctures, scrapes, bulges, separations, or cuts should be evaluated by your Nitto tyre dealer.
Air loss due to punctures can ruin tyres that might have been saved had they been removed in time for proper repair. Gradual air loss raises a tyre's operating temperature. This can cause some of the components to separate, or damage the tyre body in ways that create rapid or sudden air loss. Driving on a tyre that has an extremely low pressure for even a short distance will cause irreparable damage.
You can never play it too safe; if your tyre shows visible damage or you suspect hidden damage due to small punctures or impact, consult your Nitto Tyre dealer.