Check your tyres regularly, flat spots or areas of wear can appear very quickly. Be sure to check the tread and sidewall for signs of any irregular wear or damage.
Tyre problems can occur and become unsafe owing to many possible reasons.
This is usually due to damage or mechanical problems rather than manufacturing faults. Typical causes include brake, suspension or alignment problems or even poor tyre or wheel balance. Of course there is also the inevitable pothole or kerb damage.