There are three types of bicycle tire valves that are often seen

Schrader valve is commonly used on tires with low tire pressure, such as mountain bikes, small folding bikes, strollers, urban commuter vehicles, etc. The beautiful mouth is mainly locked by the internal pressure and the top force, high pressure resistance, and the air leakage linearity is steeper, that is to say, the air leakage is faster when the air pressure is not enough. It is widely used in inner tubes with large gas volume, so it is very convenient to inflate.

Presta Valve is relatively slender compared to the American air valve, and is often used for road or racing tires that pursue efficiency and high tire pressure (some mountain bikes are also French air valves). The advantage of the French air nozzle is that it is more convenient to fine-tune the air pressure, but it requires a special pumping device or a commonly used pumping device through the valve adapter.