[Physics] Why do the tyres of the vehicles burst during summer

everyday-lifetemperaturethermodynamics

The explanation of most is -According to Charles' law if the temperature increases volume should also increase and hence the tires burst. But it is also that if volume increases pressure decreases (Boyle's law). So the pressure of the gases should lessen and hence tires shouldn't burst. I know there is some flaw in my logic. But I can't find it. Help!

Best Answer

The volume increase of the tyre when it's hot is small, and so the pressure increase in a hot tyre is significant.

In addition, high temperatures cause rubber to weaken, which increases the chance that the tyre will pop.

By far the worst situation for a tyre is when it is not only hot, but also rolling at speed. In this condition, the flexural stresses inside the tyre are great and these stresses, plus the reduction in strength of the rubber with heat, can cause the tyre to fly to pieces.

Tyres intended for high speed use at high temperatures must be made from rubber compounds that are specifically designed to withstand heat without weakening.