Mountain novices ask for help, and the rear derailleur is adjusted

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The reason is that the two guide wheels of the rear drapeur are not in a straight line perpendicular to the ground, so the phenomenon of jumping chains (jumping) will occur (you say "creaking").

First check whether the transmission line is too loose, first tighten the transmission wire and then adjust the trimming screws and then check the rear transmission, you see whether the rear transmission is perpendicular to the ground in the back, if it is not vertical, you need to adjust, adjust the "H" and "L" trimming screws of the rear derailleur

Problem 1: After adjusting the screws on the dial (the two screws marked with "H" and "L" next to them), tighten the screws marked with "H" next to them, and try to change the speed while tightening until they are adjusted. To clarify: marked with ".

Hello, mountain novice for help, the rear derailleur debugging steps are as follows:

1.Adjust the chain to the smallest cassette and loosen the set screws h and l.

2.Re-loosen the nut that locks the shift line, pulls the cord tight, and then tightens the lock nut.

3.Adjust the plane between the rear derailleur guide wheel and the minimum flywheel, start to change speed to the maximum flywheel plate, and tighten the L positioning screw so that it just touches the rear derailleur.

4.Adjust the front dial, tighten the line, adjust to the smallest chainring, front and back dial parallel, and the maximum gap between the dial and the chainring is within 3mm.

Once the above steps are completed, the rear derailleur should be working properly. If there is still a problem, it is recommended that you find a professional repairer to check and adjust.

1. Dial the finger to the 1st gear position. Use the inner six-row mess-up wrench to loosen the shift line, and there is a Phillips screwdriver to tighten the L limit screw clockwise, which is the outer piece of the front derailleur and ** flush.

2. Observe the height of the derailleur and platter, 1-3mm.

3. Suspend the L limit screw counterclockwise, so that the derailleur is retracted, and the outer piece is 1-3mm with the chain, (that is, the minimum plate of the tower flying does not rub the derailleur as well).

4. Install the variable speed line wheel, dial to the 2nd gear, rotate the crankset, and observe whether the 2-8 gears rub the chain. If rubbing the outer piece of the derailleur, tighten the trim screws. Instead, loosen the fine-tuning screws.

Mountain bikesHere's how to adjust the front dial:

1. If it is a front derailleur that has been installed, first modulate the Hl screw to the center position, and check the derailleur and the big tooth.

Whether the relative position of the disc is accurate, and the spacing and plane positioning are accurate. Note that the front derailleur is positioned in the mid-panel position, and the indicator is selected as 2 gears.

If the front derailleur is initially installed: Install the front derailleur on the seatpost and slightly tighten the hoop fixing screws so that they have some friction with the seatpost.

It can also move up and down and turn left and right on the seatpost more freely.

2. Spacing positioning: use the preset alignment block attached to the front derailleur (you can also replace it with a toothbrush) to pad the front drapeur guide plate to make the outer guide plate surface.

On the same plane as the large crankset disc. Move the front derailleur up and down along the seat tube to keep the distance between the outer guide plate and the crankset teeth within the range of 1-3mm. At this point, tighten the front dillerale ring fixing screw slightly, so that the upper and lower positions of the front derailleur on the seatpost have been determined.

3. Plane positioning: grasp the strength, rotate the front derailleur left and right on the seat tube (be careful not to move the front derailleur up and down), and more accurately make the front derailleur outer guide plate surface and the large crankset plate surface on the same plane, that is, determine the left and right position of the front derailleur rock closed on the seat tube. At this point, tighten the front dial ring fixing screw thoroughly.

At this point, the front derailleur without pulling the wire completes the positioning on the seatpost.

4. Steel wire fixing: pass the steel wire through the position shown by the steel wire fixing screw, and the hexagonal wrench will be inside.

Place in the screws and prepare to tighten; Clamp the wire head with a wire plier and pull hard, at this time, the preset alignment block of the front dial guide plate may fall, it doesn't matter, continue to grasp the strength and direction to pull hard, and when the front dial outer guide plate surface is on the same plane as the large crankset disc surface, quickly tighten the steel wire fixing screw.

Mountain bike transmission.

Installation of the front ridge macro dial:

1. Open the fastening screws of the front derailleur (transmission front derailleur) to make the fixing ring of the front derailleur open.

2. Put the front derailleur into the riser above the bottom bracket of the frame, adjust the position of the front derailleur up and down to the position that the front derailleur installation line is about 3 mm away from the top of the large crankset teeth, and then lock the front derailleur fixing screw. (If it is a blade type front derailleur, directly insert the front derailleur into the mount for debugging).

3. Install the finger dial of the front derailleur on the handlebar and adjust it to a position suitable for your own operation for tightening.

4. Thread the transmission line pointed by the front derailleur into the transmission line sleeve, and then thread it into the transmission line holder of the front derailleur, and lock the transmission line after pulling the transmission line closer.

5. Remove the initial position fixing bolt on the front derailleur, make a fine adjustment to the front derailleur through the fine adjustment screws on the front derailleur and the front finger dial, and then adjust the limit screws on the front derailleur in place, and you're done.

First of all, observeTransmissionWhen the distance between the large chainring and the car, the new front dial has a sticker marked with the distance, which can be adjusted according to this sticker, if there is no sticker in the future, it can be measured according to the hand test or ruler, and the distance between 1 and 2mm can be roughly maintained, as shown in the figure below.

2. Then, keep the large chainring and the front derailleur chain plate parallel as shown in the figure below.

3. Next, the front derailleur gear lever is changed to 1, the fine-tuning bolt is zeroed, and the adjustment of the front derailleur has two steps, one is to adjust the inner limit (the inner dead center of the drive range) and the outer limit (the outer dead center of the drive range), and the other is the positioning adjustment when changing speeds, as shown in the figure below.

Although there are many types of vehicles, the structure is similar. This should be said to be the credit of standardization, but also the need for large-scale production lines. With the development of society, the progress of science and technology and the change of demand, the shape of railway vehicles has begun to change, especially the passenger car is no longer the same old face.

However, their basic structure has not changed significantly, but the specific parts have a more scientific and advanced structural design.

Generally speaking, the basic structure of the vehicle is composed of five parts: the car body, the undercarriage, the running part, the coupler buffer device and the braking device.

The body is the part of the vehicle that is used to load goods or passengers, and is the basis for the installation and connection of other components of the vehicle. The body of the early vehicles was mainly made of wood, supplemented by steel plates, bow rods, etc. In modern times, the car body is mainly steel structure or light metal structure.

The adjustment of the mountain bike front derailleur mainly adjusts the inner limit (the inner dead center of the drive range) and the outer limit (the outer dead center of the drive range). The specific steps are as follows:

1. First know the limit screw, in the figure below, L represents the inner limit, and H represents the outer limit.

2. Inner limit adjustment: first change the crankset to the smallest tooth, and the flywheel to the maximum tooth, check whether the inner guide chain car is rubbed against the chain, or the gap between the inner guide chain plate and the chain is large, at this time, you need to adjust the screw marked L on the front dial to keep a distance of 1 to the chain.

3. The following picture shows that the chain touches the leading chain plate, which can be adjusted to the required distance. You can first loosen the front derailleur speed line, adjust the spacing of the front derailleur inner limit according to the inner limit adjustment method, and then tighten the front derailleur to close the late line.

4. Adjustment of the outer limit: change the front dial to the maximum chainring, change the flywheel to the smallest piece, and then check whether the outer guide plate touches the chain or the spacing is too large, and adjust the screws marked with h for adjustment. Again, keep a distance of 1 to .

5. As shown in the figure below, if the spacing is too large, you only need to adjust the H screw. If the outer chain guide plate is too outward, the chain will fall off outwards and even get stuck between the chain and the crank, so you need to be careful.

6. Note: If the outer guide plate of the adjusting H screw still touches the chain, it means that the transmission line is relatively loose and the fine-tuning bolt on the transmission needs to be adjusted. Here's the one the screwdriver is pointing at.

In this way, the adjustment of the front dial is completed, and we try to change the speed several times after adjusting to see if the speed change is smooth, and then patiently adjust it a few times according to the above method according to the specific problem, and it may be possible to solve the problem.

The mountain bike transmission rear derailleur is an important part of controlling the speed of the bicycle, which allows the rider to adjust the speed and resistance of the bicycle in different road conditions. The scope of correct use is as follows:

1.Before use, please make sure that the transmission is adjusted normally, and that the rear derailleur is smooth and free of lag.

2.During riding, the position of the rear derailleur should be adjusted appropriately according to factors such as road slope and wind strength. In general, on flat roads or uphill slopes, the rear derailleur should be shifted to a smaller state gear to make it easier to pedal.

On the other hand, when going downhill, you can move the rear derailleur to the larger gears for better speed control.

3.Gradually increase or decrease resistance during riding to avoid sudden gear shifts that can cause imbalance or falls.

4.Take care to keep the rear wheel turning, especially when changing gears, stop pedaling, and wait for the transmission to fully enter the new gear before continuing to ride.

In short, when using the rear derailleur of the mountain bike, you need to pay attention to the reasonable adjustment of gears, and abide by the relevant riding rules and safe operation methods.