Many parameters of the bicycle you just bought are not very suitable for you, such as the height of the seat. However, a careful friend may find that it is not only necessary to adjust the height of the seat, but also the distance between the front and rear of the seat. Fine-tuned. The correct front-to-back distance of the seat should be that when we rotate the pedals to the front, the knee is above the center of gravity of the pedals. In other words, the pedals and the knees are in the same straight line. If it is not, you need to adjust it appropriately.
How to adjust it? First of all, keep the car seat level. The car seat is clamped in the middle of the guide rails, usually with a scale, just in the center. Sit on the seat, rotate the pedals to the front level, then find a heavy object, hang it with a rope, and use the principle of plumb to check whether the knee is above the center of gravity of the pedal. If not, then fine-tune the sitting bag again and repeat the above inspection.
Of course, what the bicycle factory wants to say is that this is just a way to teach everyone how to adjust their riding posture. Everyone’s riding habits and postures are different. Some people feel that the seat is lower and more comfortable, and some people I like the point in front of the car seat. This is caused by the difference of each person’s body. Therefore, as long as it is in the correct posture, there is no problem with some differences in these small parameters.