Tire can puncture while running!
If there is a stone between the tread blocks or a nail is spiked, tire can puncture or tear during running. This tire should be replaced immediately and repaired to avoid further damages on the surface or the vehicle. Only a professional can tell you whether the tire can be repaired or have to be replaced.
Cases in which the tire cannot be repaired:
Tear of the sidewall
Steel cords of the tire bead are deformed
Separation of the rubber layers or the fabric
Wrinkles on the rubber or fabric
Damage caused by hydrocarbons or chemicals
Abrasions or stains on the inside of the tire as a result of continuous operation with low pressure