A Presta Valve's recommended pressure is usually embossed on the tyre's The recommended pressure to inflate a bike tyre to is usually embossed on the tyre's Many modern pumps can be converted between Presta and Schrader fitting. Step-by-step guide To inflate a Presta valve, Remove the black plastic cap Or, thread on a Presta-to-Schrader adapter to use pumps or. There is no need to depress the stem in a Presta valve, since air the valve has become stuck, and I can only use it for inflating Schrader.
Bike stores sell air pumps that can fit both valve styles or just one valve type. Inflating a tire with a Presta valve is similar to the inflation method for a Schrader . In other words, you can't use a Schrader-headed pump to inflate a Presta valve tube without an adapter, and the opposite operation won't work. The Presta valve, also called Sclaverand valve (SV) or French valve (FV) is a valve commonly found in high pressure road style and some mountain bicycle.