Bicycle gearshift adjustment
Correct setting of front and rear derailleur speeds
During the operation of the bike, it is often necessary to carry out some minor repairs: replace or pump up the camera in the wheel, tighten the brakes or adjust the gear shift.
Changing speeds is necessary in order to properly distribute the load on the cyclist at different stages of the path. By increasing or, conversely, lowering the gear, you can facilitate the uphill climb by increasing the number of revolutions or, when descending from the mountain, develop a higher speed.
It is very important to choose a good, high-quality switch that will be easy enough to set up and will not fail along the way. Many cyclists prefer the Shimano brand in this regard.
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The change of speeds occurs due to the weakening or, conversely, the tension of the cable inside the mechanism that moves the switch. It has a fairly simple mechanical design, so the process of adjusting them can hardly be called a difficult and difficult task. There are many models that are fairly easy to set up and operate, such as those manufactured by Shimano.
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Before adjusting, make sure that the switches are intact, not deformed, and interact correctly with each other. In addition, it is worth checking the degree of wear of the parts and replacing them if necessary. Shimano derailleurs are particularly durable. Also, all dirt, dust and residues of oil or grease should be removed.
Front derailleur setting
When adjusting the front bike derailleur, you also need to adjust the low and high gear stops. For this, as in the rear, it is necessary to loosen or tighten the stop screws. Correct setting will prevent the chain from jumping and sticking when shifting. The next step is to secure the drive cable. To do this, it will need to be placed in a special groove located under the fastening screw.
After adjustment, it is necessary to check how the load transfer is obtained. To do this, you can take a little bike ride. During the movement, the chain should be thrown onto the adjacent sprocket without problems and in no case should it touch the bike frame.
In addition to adjusting the gear system for a more comfortable and pleasant ride, when adjusting the bike, you can also adjust the front fork with shock absorbers.
Rear derailleur setting
For greater convenience, when directly adjusting the bike, it can be turned upside down with the wheels, onto the handlebars and saddle.
Before adjusting the rear derailleur, loosen the cable tension, then put the first gear. If it is impossible to do this automatically, then you should manually throw the chain onto a large sprocket (and to a small one on pedal gears).
To begin with, it is worth adjusting the special limit screws that prevent the chain from jumping off when moving to the extreme sprockets. To do this, carefully tighten the screws marked L, low (for low gears) and H, high (for high gears). This must be done very carefully, without overdoing it, since if these screws are loosely tightened, the chain will jump off the sprocket, if it is strong, then this can prevent the chain from moving to the extreme sprocket. After that, it is already possible to directly adjust the rear derailleur. The essence of the whole setup is to adjust the position of the rollers so that when pedaling it does not touch the teeth of the large sprocket. If, when twisting, the chain does not come off well from large sprockets to smaller ones, in this case it is necessary to further loosen the cable tension by rotating the pedals clockwise. Adjustment procedures should be continued until there is a clear gear change. Quite easy to adjust Shimano shifters.
- Hex key set.
Adjusting the shock absorber fork
There are several tuning options for a bike fork:
- First, you can adjust the spring rate of the shock absorber. This setting is called preload and is required when changing riding style. Adjusts to the individual style and weight of the cyclist;
- Another type of bike fork shock adjustment is rebound. It is responsible for the rate at which the spring returns to its original state after deformation. With this setting, the spring quickly returns to its original form, which is very important for tracks with a sharp change.
- The third type of setting is called compression and is the opposite of the previous settings. In this case, the shock absorber, on the contrary, slows down the compression speed of the fork.
- Another type of setting allows using a certain switch to make a rigid fork out of a regular plug. It is called lockout. Not available on all types of plugs. Shimano Lockout forks.
- The last setting. extension control. is for adjusting the fork travel. Usually configured for different driving conditions, whether it be city or rough terrain.
how to adjust gear shifting on a bike