Question

how is it possible to put in the tube of a bicycle​

Answer 1

Answer:

yes, it is possible

Explanation:

let air out, press down on the tip, which opens the valve. Also, before inflation, press down to make sure the valve is open. For Schrader valves, to release air, press something into the valve to depress the valve core (the little pin inside the valve). To inflate, simply attach the pump and get to work.