During the hot summer days, when you drive, the temperature of tyres increases faster, consequently, the heated air inside the tyres expands and its pressure rises quickly, which can lead to tyre blowout with disastrous consequences. A tyre blowout is a rapid loss of inflation pressure of a pneumatic tyre leading to an explosion.
Most tyre manufacturers recommend replacing the tyre when its tread depth drops below 3mm. Let's see why this is so.
Testing tyre performance on the wet has shown that tyres should be changed when the tread depth is below 3mm. Britains Motor Industry Research Association (MIRA) conducted tests in 2004. which prove that worn out tyres greatly increase the likelihood of having a car accident in the wet, because the braking distance gets substantially longer.