Bicycle derailleurs are also divided into external derailleurs and inner derailleurs, as follows

During the riding process, everyone remember to measure their own physical fitness, and then choose the gear that suits them. Don’t reluctantly step on the mid-range because of the pursuit of speed.

After using the bicycle equipment for a period of time. In order to make it last longer, then you need to do a good job of maintaining the bike equipment.

Unlike the hand brakes that are more commonly used, the inverted brake hub uses the inverted brake method, which means that when we apply the brakes, we only need to apply the brakes backwards with our feet.