Tyre failures rarely happen without warning. In most cases there are visible or physical signs that a tyre is approaching the end of its safe life. Catching these warning signs early means a planned, convenient tyre replacement rather than an emergency blowout at speed.
1. A Bulge or Bubble in the Sidewall
A bulge on the sidewall indicates that the internal structure of the tyre — the cords that give it strength — has been damaged, typically by a sharp impact. The air pressure is pushing through the weakened area, and the tyre can fail at any moment. This is not repairable and requires immediate replacement. Do not drive on a tyre with a sidewall bulge if you can avoid it.
2. Cracks in the Rubber
Small cracks in the tyre sidewall or tread surface indicate rubber degradation, often due to UV exposure, ozone, age or incorrect tyre pressure over time. Fine surface cracking on an old tyre can progress to deep cracks that compromise tyre integrity. Any tyre showing significant cracking should be inspected and likely replaced.
3. Tread Wear Indicator Bars Visible
Modern tyres have wear indicator bars moulded into the tread grooves. When these bars become level with the surrounding tread surface, the tyre has reached the 1.6mm legal minimum and must be replaced immediately.
4. Persistent Vibration or Unusual Noise
A thumping or vibrating sensation at certain speeds, or a humming noise that changes with speed, can indicate a developing tyre problem such as internal damage, delamination or severe imbalance. Have the tyres inspected as soon as possible.
5. Your TPMS Warning Light Is On
If your tyre pressure monitoring system warning light illuminates, check all four tyre pressures immediately. A tyre significantly below its recommended pressure is at risk of heat damage and potential blowout. If pressure loss is rapid or a tyre is visibly flat, call our emergency mobile tyre service for Glasgow and Bradford on 0141 673 6841.
