Hello everyone, the principal is going to do some science popularization today and share a little secret about bicycle maintenance with you. Do you know which parts of a bicycle need regular lubrication? Let's take a look together!

First of all, we must understand that the operation of a bicycle cannot be separated from the collaborative work of various components. Lubricants, like lubricants, can reduce friction between parts and extend the life of bicycles. So, which parts need our special attention?

1. Chain: Chain is a key part of a bicycle that transmits power and is also the most easily worn part. Therefore, we need to oil the chain regularly to keep it lubricated. Generally speaking, every 100-200 kilometers you need to oil the chain.

2. Axle: The axle connects the wheel and the body and plays an important supporting role. In order to ensure the normal operation of the axle, we need to oil the axle regularly to reduce wear.

3. Transmission: The transmission is a key component in adjusting speed, and its internal parts also need to be kept lubricated. We can use special transmission lubricants and apply them at regular intervals.

4. Brake system: Brake system is directly related to our safety, so its lubrication is also very important. We can regularly check the brake line to ensure its lubrication to ensure the normal operation of the brake system.

5. Bearings: Bearings are the core of each rotating part of the bicycle. Maintaining lubrication of the bearings can reduce wear and extend service life. We can apply it with butter or a special bearing lubricant.

These are the parts of the bicycle that need regular refueling and lubrication. Of course, in addition to these parts, we also need to regularly inspect other parts of the bicycle to ensure their normal operation. Ride worry-free, starting with maintenance. Let's cheer together and enjoy the fun of riding!