On a Bicycle, a valve is an element inseparable from the visible Tube tire on the Jante and which makes it possible to inflate or to deflate the wheel.

There exist mainly three types of valves of tire tube of bicycle:

• the valves Schrader, corresponding to the valve of a wheel of car, one generally finds them on VTT;

• the valves Presta or Sclaverand which one finds on the bicycles of city;

• the valves Dunlop which one finds for example on the Dutch bicycles