The gearshift mechanism is a very important element of modern sports and mountain bikes. There are many different systems, but the principle of their adjustment is almost the same. First of all, the mechanism should be cleaned of debris, dust and dirt. Now look at the switch. It has a limitation on the extreme positions indicated by the letters “H” and “L”. Often the problem is the tension of the cable, which you just need to tighten.
Before you adjust the gearshift on the mechanics, you need to combine a small star with rollers. The bike chain should also be set correctly. On the front gear, it should hang on
the largest star, and on the rear - on the smallest. In this case, you need to monitor the cable tension. Now you can test the regulator. To do this, switch the speed lever one division down, after which the chain should be on the next star. If this does not happen, you need to debug the cable tension.
If you observe a beating, then adjusting the gear shift on the bike begins by checking the parallelism of the stars and the switch frame. Also pay attention to the height of its installation. At the same time, remember that you do not need to share the last two programs. This is a general concept about regulator debugging.
Since several mechanisms take part in the process of increasing or decreasing speed, each of them should be considered separately. Switching should be set from the back of the system. First of all, you need to make sure that the lever with rollers, which helps to transfer the chain from one star to another, is not bent. If this is the case, then the mount should be aligned.
Adjusting the gearshift on the bike, the front derailleur, is very simple. The main requirement is its correct installation. Make sure that the frame is installed parallel to the stars, and the distance between them is 1-3 mm.
First you need to set the lowest speed. Now you need to slightly loosen the cable and turn the screw with the inscription "L". Thus, you will adjust the necessary distance between the star and the frame. After that, the cable can be fixed back. Now you can set the maximum speed with the screw with the designation "H".
After all the settings you should check the bike in motion. If the chain does not jump well from one star to another, adjust the cable. Cycling gear adjustments should be made as soon as problems are detected. For example, if the chain slips during pedaling, then in this case you should completely change it, since it has stretched. However, it should not be warped during gear changes.
You should also check the cable for damage and breaks. In severe cases, it requires a complete replacement. It also happens that you have to install a completely new mechanism. So, adjusting gear changes on a bicycle is a fairly simple procedure that you can do yourself.