Question

why is rubber tyre put in hot water before being fixed onto the wheel​

Answer 1

Explanation:

The rubber tyre put in hot water before being fixed on to the wheel because tyre expand and after sometime contract to fit properly.

Answer 2

Answer:

• A rubber tyre is put in hot water before being fixed on to the wheel to warm up the tyre.
• When the tyre warms up, it can expand and stretch over the wheel easily and then upon cooling down, it will contract back to its original size and will fit into the wheel perfectly.
• Hot water at a temperature of $140^{\circ} \mathrm{C}$} is usually used to dip the tyre.
• The polyurethane present in the tyre expands with heat causing the tyre to become supple, stretch and expand to fit into the wheel.