1. American-style valve: The American-style valve is mainly locked by internal pressure. It is resistant to high pressure and has a steep air leakage linearity. That is to say, when the air pressure is insufficient, the air leaks faster. The foundation of the valve is large, and the diameter of the valve is also large. However, The inflation flow rate is large, so it is widely used in inner tubes with large air volumes, so it is very convenient to inflate! The main advantage of American-style valves is that they have better "compatibility" and are used more often. There are also many American-style valves on civilian cars, so they can be replaced, repaired, and inflated in many places. The disadvantages are It is a bit constrained when used on knife-shaped rims, and the air nozzle is not long enough. When inflating, the air nozzle always shrinks down and is not easily clamped. There is basically no problem when used on I-shaped rings.

2. French valve: manual locking valve, high pressure resistance, smooth air leakage linearity, thin valve base, lightweight, small valve diameter, little impact on the strength of the rim, can be used on 19C size inner tubes or narrow tubes Circle, the price is high!

French valves do have long mouth specifications. Because the valves are relatively thin, they are very suitable for use on knife-shaped rims and have good air sealing properties. The disadvantage is that the "compatibility" is relatively poor because the popularity rate is relatively low. You need a special pump bucket or a French-American mouth adapter! If you don't bring an adapter or a special air bucket with you when you ride a bike, it will be a disaster if something goes wrong with your tires on the way - it is impossible for the small car shops on the way to provide inflators for French style valves. Most car repair places have never heard of it!

3. British valve: The valve relies on a rubber sleeve to prevent leakage. The leakage prevention ability mainly depends on the quality of the rubber sleeve. The air tightness is very good (general riders may think that the British valve is resistant to tire leakage quickly, but if the rubber tube is not rotten , in fact, it has nothing to do with the valve, mainly because the inner tube of the general Yingzui only uses ordinary rubber instead of butyl material), but the pressure resistance is low, the valve base is large, the weight is large, the inflation flow is small, and the rubber sleeve The durability is poor, but it is easy to repair, the inner tube will not be scrapped due to valve problems, and the price is low.