Bicycle gear ratio and common sense

Summary: First of all, riders must know the structure of the transmission very well, so that you can know how to debug the corre...
First of all, riders must know the structure of the transmission very well, so that you can know how to debug the corresponding components under what circumstances. If you don't know the structure of the transmission system, blindly operating it may result in poor quality work or even failure of the transmission.
The operation mode and common sense of transmission:

1. Novices often change gears immediately when they see a big slope and use a smaller gear ratio, which directly leads to a sudden increase in frequency. When the muscles are not adapted, they will immediately feel muscle fatigue, and due to the gear ratio If it is too light, it will cause an immediate drop in speed. When other drivers are overtaking, it will also cause the frequency of the legs that have been suddenly fatigued to rise again. In this way, as long as one or two slopes are passed, the transmission is relatively small and it will immediately show weakness. Therefore, the correct climbing speed change should be that the car has reached half a slope, the foot starts to feel the pressure rise, and then the speed is started, and the adjustment range is generally 2 or 3 flights at a time, depending on the specific slope increase. This is not only Physical strength and experience are required. In the early stage of climbing, standing pedaling can also provide greater speed, and can delay the reduction of gear ratio, but the foot has sufficient time for frequency.
In addition, Banpo shifting often encounters that the chain cannot be retracted due to the excessive tension of the chain. Here is a small trick. When retracting the front plate, the foot should be lighter, so that the chain pressure can be slightly relieved. It's easy to make the chain fall back like a small plate. The same technique should also be used for rear-flying gear shifts when the Banpo chain collapses under very tight pressure, so as to have a certain protective effect on the entire system.

2. It is inappropriate to choose a gear ratio that is too large or too small. It is incorrect to use a large plate to a big fly and a small plate to a small fly. The big plate to the big fly will cause excessive chain tension.
The rear derailleur is damaged to a certain extent, and this type of speed change will also cause increased friction due to excessive chain tension. The small disc is also an incorrect shift for Xiao Fei, because it will make the chain too loose and cause malfunctions when violent bumps (such as the chain hitting the frame, the chain sway hits the edge of the tire), and the small disc and Xiao Fei They are the fastest worn parts in the front and rear transmission systems. Therefore, the high speed should be the big disk versus the small fly, and the lightest climb should be the small disk versus the big fly. This is the correct way to use the speed change. In addition, the 22-tooth smallest disk of mountain bikes is actually the part with the lowest frequency of use. One of the main uses of this small disk is to prevent the chain from falling directly when the second layer is violently bumped. When using the 22-tooth small disk to fly It is easy to cause the rear wheels to slip and lose speed, so try to avoid using this layer for mountain bike gearing. Only use a small amount on super steep slopes, and you must pay attention to pedaling when you use this layer. It is sleek, otherwise it would be difficult to climb steep slopes.

3. The physical condition of each amateur rider is different, and the weight of the equipment is also very different (generally, a light car and a heavy car can have one or two teeth behind, and they travel at the same pedaling frequency), but the light car can accelerate It is good for climbing and climbing, but it is more affected by wind resistance than heavy vehicles. Therefore, light vehicles must have better gear shifting skills to give full play to their strengths. The same applies for heavy and light players to control their gears. However, the maximum gear ratio and the smaller gear ratio are both bad. Many enthusiasts think that if the front is the largest and the rear is the smallest, they can get a better speed at the lowest frequency. In fact, this is wrong, because a large rotation ratio will cause every The foot strength is greater and the frequency is lower, which makes the blood circulation slower and more likely to cause hypoxia in the muscles. At the same time, the 11-tooth or 12-tooth flyers are the least durable in the entire transmission system, and these are really used in the lower part. High frequency and high speed on slope.

Generally, you can use a slightly smaller gear ratio for the few kilometers to warm up, so that the blood vessels will expand and the muscles will be opened. When entering the real high speed, the gear ratio can be gradually adjusted. As the road changes up and down, the situation changes flexibly, and the end sprint Instead, the gear ratio should be slightly adjusted so that when the frequency is slightly adapted to the high speed, the adjustment becomes lighter at the last moment after the start, because this can easily accelerate suddenly, sprint at the fastest frequency, and keep everything at the end. Exhausted in an instant, but distance and timing must be important.

Summarizing the definition, the key to the quality of the transmission system lies in the skill of the rider in debugging the transmission. The more he understands the structure of the transmission, the more sure he will be in operation, and the more he can use the transmission system to its extreme.