Question

What is the work of the valve-tube in the cycle tube?

Answer 1

there are several types of bike tires and rims, yet all of them share a common characteristic, a valve, which allows air to go inside the wheel and not escape in order to create a high pressure zone that helps the tyre maintain it’s shape under the riders weight, which is why heavier riders need higher tyre pressures.

Answer 2

the valve tube is the way who helps give air on cycle tube ..