When riding under different road conditions, timely adjusting the gear shift of the mountain bike to meet the needs of riding will make your own riding experience very different and fun. But novices just need to understand the concept of correct operation before starting to ride a road bike.
Do not adjust to a light or heavy gear
When the gear is too light, the rider’s strength when stepping on is likely to be uneven. Too much force on the leg will make the rider’s hips unable to sit on the seat cushion steadily, causing the so-called “hip jump”. Moreover, due to the excessive force on the legs, the posture of the pedaling is changed, which affects the smoothness of the pedaling movement. There are also many beginners who lack training at the beginning and the leg lacks sufficient muscle endurance. Can have greater power to move forward, but also because the muscles can’t withstand the pressure, resulting in sports injuries such as knee joints or muscle strains. Beginners should measure their physical fitness. Do not reluctantly use heavy gear for the pursuit of speed. Take a long distance.
Match the right gear ratio on different road conditions
Some beginners often like to adjust the teeth of the front and rear chainrings according to their riding habits and preferences when choosing a vehicle. However, we should choose the right preference and achieve the most efficient pedal output.
On flat roads, the front chainring is usually a small one, mainly with the rear 17 to 21 chainring. If riding in a downwind, the rider can adjust the front to the large one, and the rear chainring can Free to match, to achieve the effect of high-speed cruising.
In the riding plane section, if there is a sharp short slope ahead, such as bridges, hilly terrain, etc. The rider can use the inertia of the riding plane to rush up, the front chainring can be maintained at the position of the large plate, and the rear chainring should be shifted according to the road conditions.
As the uphill section will increase the burden on the legs of the rider when pedaling, resulting in excessive resistance of the legs. At this time, the gear of the rear disc should be adjusted. At the beginning, the one-to-one adjustment method is used to gradually find the most suitable gear. With the riding experience afterwards, you can easily find the gear that suits you. When riding a continuous uphill section, such as Taitung Shouka and other long and steep terrain, the rider should change gears according to the terrain, usually the front gear is adjusted to a small gear, and the rear gear is It is constantly changing gears to match the rapidly changing terrain conditions.
When a beginner rides a continuous downhill section, the first principle should be to maintain average pedaling efficiency and avoid affecting the vehicles behind. The front chainring can be adjusted to the large one, and the rear chainring can be gradually lowered. Do not adjust because of greed. If there are sudden conditions or sharp corners that cause the brakes to fail, it may cause serious accidents.
In fact, there is no so-called correct shift timing during riding. After all, everyone has different physical conditions. Riders should listen to and feel the degree of their own riding to change gears. In simple terms, when you feel resistance when riding, you should change gears, and if you step on too much, you should lighten the gear, and vice versa. I often hear some people’s doubts about variable-speed cars: Will the more gears change the more expensive? Variable speed vehicles are more prone to failure than single speed vehicles. . . Wait, to tell the truth, the price of a bicycle should depend on the level of the matching parts, and the concept that the speed change car is more prone to failure because of the increased speed change, but also because of the deep impression that everyone does not understand the speed change; However, when I participated in the event, I did find that many riders did not make good use of the speed change function of their cars, making it difficult and time-consuming when climbing, but some riders feel that they cannot always grasp the timing of the speed change. The players made a simple introduction.
Know your transmission match:
First of all, you need to understand how your own bicycle’s transmission system is matched. For mountain bikes, the current front chainring is mostly three-piece, and the more commonly used teeth are 42.32.22 or 46.36.26. In the rear wheel, the flywheel is mostly seven or eight pieces, from 11 teeth to 26 or 28 or even larger 32 teeth. In order to overcome various terrains, the distance between the teeth of the mountain bike will be relatively large. The general number of variable speeds is obtained by multiplying the number of front and rear teeth. Like 3*7=21 paragraphs. 3*8=24 segments: The biggest difference in road bikes is that the front chainring is mostly two pieces, and the more commonly used teeth are 52.42 or 53.39. The rear flywheel is from the early 6 pieces, 7 pieces, 8 pieces to the latest 9 pieces; with different number of teeth, the purpose is only to make the gap of the gear ratio more narrow; the rear flywheel is from 12 teeth to 23 teeth for road vehicles The number of teeth commonly used.
The relationship between gear ratio and bicycle travel:
When we step on the pedal and make a full rotation, the power is transferred from the crank to the tooth plate, and then the power is transmitted to the rear flywheel through the chain. The rotation of the disk is a fixed frequency, so the factor that determines the speed of the wheel is the gear ratio; that is, the rotation of the large gear wheel can drive the rear wheel a few times. This is entirely determined by the gear ratio, and we are practical Technically, in the face of various terrains, we must find an appropriate gear ratio between labor-saving and time-saving, and then we will analyze the readers with more common gear ratios:
Front gear: 22.32.42
Number of rear teeth: 220.127.116.11.21.24.28
Wheel diameter: 26*1.95 (more common mountain bike tire size)
When riding, try not to put the chain in two states: the maximum tooth of the front gear corresponds to the maximum tooth of the rear flywheel and the minimum tooth of the front gear corresponds to the minimum tooth of the rear flywheel; while parking, it is best to change the speed change to the minimum tooth of the front gear Corresponding to the minimum tooth state of the rear flywheel to reduce the load on the transmission spring.
How to seize the timing of shifting?
From the above table, it can be seen that strictly speaking, the general 21-speed transmission can only use 19-speed transmission, because the slope of the chain is too large when using the 42*28 gear ratio, and it is easy to cause the rear derailleur to stretch. It is too large, so it is not recommended to use, and the upper wheel ratio of 22*12 teeth is also due to the slope relationship, which will cause the chain to rub against the inside of the front 32-tooth tooth plate to produce noise, and is not suitable for riding, but if it is in After riding or not using the bicycle for a long time, it is recommended that you can put the chain on this tooth to reduce the burden of the rear shift spring. In addition, it can also be seen from this table that the relationship between the gear ratio and the gear ratio is not in the order of the gear arrangement, but must be changed back and forth. Move your fingers more to practice how to grasp the proper timing and skills of shifting gears; we can see from the distance traveled, from stepping on the crank a circle can be moved from the shortest 1.6 meters to the farthest 7.1 meters, the gap between this Quite large, in short, it feels brisk to step on a short moving distance, and the greater the moving distance, the greater the kinetic energy it consumes, which naturally feels laborious. As for how to adjust your own speed change, due to the different physical strength and muscle strength of each body, only It can be said that it is “like people drinking water, knowing how to warm and cool”. The use suggestion column of this table can only be used as a reference. You novices must still take more roads and experience to use the effect of speed change to overcome all terrain.