Adjusting and adjusting the front derailleur of the bicycle
After you have made all the preparatory measures, you can proceed to the adjustment and tuning. If you install a new derailleur or remove it during cleaning, then before adjusting it should be positioned relative to the chainrings, and then proceed with the adjustment.
Why can’t I adjust the front derailleur
If you have not been able to clearly adjust the front derailleur of your bike several times, then most likely you have one of the following problems:.
- Wrong switch or star system.
- The switch is deformed or out of order.
- Tight running of the cable in the shirt.
- The shifter is out of order.
- The chain is too stretched.
- Derailleur, cable and chain are heavily soiled.
How to set up and adjust the bike’s front derailleur
Sooner or later, every cyclist has to adjust and tune the bike’s front derailleur. And the cheaper the transfer, the more often. This happens for many reasons. For example, the cable is stretching, or you decide to adjust after replacing the derailleur. This does not change the essence. For this operation, you need to perform approximately the same steps. Therefore, we decided to talk in detail about how to set up and adjust the front derailleur of the bicycle using the example of pictures and videos, and what needs to be done before performing this procedure.
Correct installation of the front derailleur
The correct position of the front derailleur is considered such that the longitudinal axis of its guide frame is parallel to the chainrings, and the distance from the bottom of its outer part to the largest chainring is no more than 2 mm. To make it easier to set the correct throwing position, it is advisable to remove the chain.
We set the distance from the bottom of the outer part of the frame to the largest star by moving the crossover along the vertical tube of the bicycle frame. We bend the parallelogram of the switch from the frame towards the largest sprocket, and, aligning the frame and the large sprocket relative to each other, we try to achieve the minimum distance (no more than 2 mm) at which its outer part does not touch the teeth. To simplify this procedure, you can insert some object between the frame and the parallelogram.
If you bought a new derailleur from Shimano, then this procedure is simplified by the fact that there is a plastic sticker with marks on the transfer frame, which indicates at what level it should be installed relative to the large sprocket of the system.
After we have determined the height at which the switch clamp will be fixed, make a mark with a marker and slightly tighten the clamp fixing bolt.
To adjust the position of the frame axis relative to the star system, loosen the clamp bolt (while the cable should be folded back) and, by rotating the switch, adjust it so that the frame is parallel to the front sprockets. Due to the complex geometry of the latter, it is quite difficult to determine by eye. You can navigate by the parallelogram (if the design allows it). To simplify this operation, you can stick a ruler (on double-sided tape) or other object to the switch frame (on the double-sided tape) or other object that will simplify the positioning of the switch.
After that, we slightly tighten the clamp bolt and re-check the distance from the lower edge of the frame to the largest sprocket in the system, and the parallelism of the longitudinal axis relative to the chainrings.
If everything is fine, then completely tighten the clamp bolt.
This completes the adjustment of the position of the front derailleur. Now you can put on the chain and start setting up.
Design and principle of operation of the front crossover
The design of the front derailleur is very simple. We will consider all its components, as well as their purpose below.
- Clamp. This part attaches the front derailleur to the bike frame.
- Parallelogram. Parallelogram-shaped hinged spring-loaded part. It is the main moving part of the front bulkhead, to which the frame is attached.
- A guide frame that has an outer and an inner part. A chain runs inside her.
- Adjusting bolts L and H (stops). There are two of them. They restrict the movement of the guide frame towards the frame (L) and away from it (H).
- Cable bolt. Locks the gear shift cable.
How To Adjust Your Front Derailleur
The principle of operation is based on a simple collision of the chain on the desired star. When the gear is shifted from a larger (in diameter) star to a smaller one, the cable tension is weakened, and the switch spring pulls the parallelogram with the guide frame a certain distance towards the frame. The outside of the frame pushes against the chain, causing it to bounce onto the smaller sprocket. When switching from a smaller star to a larger one, the opposite process occurs. The derailleur cable tightens and moves the parallelogram and guide frame away from the frame. The inner part of the frame presses on the chain, and thanks to the special shape of the frame itself, as well as special hooks on the sprockets of the front system, the chain engages and throws it onto a large sprocket.
This design provides limiting bolts (L and H) against which the parallelogram rests when the end positions are reached. If the setting of the front derailleur stops is not correct, the chain will jump off the carriage or connecting rod.
Speed selector setting
In order not to keep the bike suspended while tuning, try hanging it from the saddle, thereby raising the rear wheel. You can also use an ironing board for this. We put the bike with the upper tube of the frame on the ironing board plate, threading it into a triangle.
Setting up the front derailleur is straightforward. We will write it down point by point for greater clarity.
- We set the lowest speed using the switch on the steering wheel (remember that at this stage the cable should not be attached to the crossover). We twist the adjustment of the tension of the gearshift cable on the shifter until it stops clockwise (if you look at the entrance of the shirt into the shifter) and return it back by 1-2 turns. Many recommend tightening completely, but as practice shows, for further fine tuning, it is better to leave a margin for tension / loosening of the cable in both directions.
- Set the lowest speed on the rear derailleur (largest sprocket). As a result, you will get the first speed front and rear (the chain should be on these stars).
- We adjust the limit switch “L” so that the inner part of the frame is as close to the chain as possible, but does not touch it when pedaling. To do this, if you need to move the frame towards the bike frame, you should turn the bolt L counterclockwise, from the frame. clockwise.
- We insert the cable into the place of fixation on the gear selector and, pulling it (with your hands, do not use pliers), tighten the cable bolt.
- We switch gears from the front to the largest star, from the back to the smallest (the chain should be on these stars).
- We adjust the limiter “H”. It is necessary to achieve such a position of the guide frame in which its outer part is as close to the chain as possible, but does not rub against it when pedaling. To move the frame towards the frame, turn the screw clockwise, in the opposite direction. counterclockwise.
- We set the 5th speed on the rear cross-over. After that, turning the pedals, we change the speeds with the front derailleur over the entire range (3. 2. 1. 2. 3) several times. Then set speed 2 to the front and, shifting reverse gears, check that there is no friction between the chain and the frame in positions 2. 2 and 2. 7 (example for 24 speed bicycles). expensive front derailleurs can achieve frictionlessness even at 2-1 and 2-8 (although you should be aware that these are not normal modes and should not be used when driving). If there is friction of the chain against the frame in these positions or unclear gear shifting, then the cable tension should be adjusted by rotating the adjustment on the front shifter lever. In case of problems when switching from a smaller chainring to a larger one, tighten the cable (turn the adjustment counterclockwise), and when it is impossible to switch from a larger to a smaller one, loosen it (turn the adjustment clockwise). If there are no comments on the work, then the next test must be performed under load when driving on roads.
- We find a flat section of the road (without bumps and slopes) and check the operation of the front crossover while driving. In case of any problems when switching, right on the go, we rotate the adjustment on the shifter in the direction we need.
If you do not understand something about how to set up the front derailleur, then we advise you to watch a video on this topic.
Things to do before adjusting the front derailleur
- Check if the changeover fits the front sprocket. If you can’t make adjustments for a long time or are installing a new front derailleur, then it is worth checking this item. There are three main parameters (apart from the direction of cable feed, etc.) that may not be appropriate for normal operation of the switch. This is the maximum number of teeth of the largest sprocket, the maximum difference between the teeth of the smallest and largest sprockets, and the minimum difference between the teeth of the middle and largest sprockets. These parameters can be found in the instructions for the speed switch. There are also derailleurs for three front stars and for two, plus the system may not correspond to everything. We will cover the topic of how to choose a front derailleur in more detail in another article. Below we give a picture with the transfer parameters of Shimano Alivio FD. M 430/431 as an example.
- Check for play and visually inspect for damage. It happens that during a fall, as well as with prolonged use, backlash of the frame, parallelogram and other parts of the switch is formed. Plus, the frame itself can bend. This results in fuzzy gear changes and tuning problems. Fine tuning is impossible without the elimination of backlash. The best option would be to buy a new switch.
- Clean the debris from the switch and relubricate it. Before you start adjusting and adjusting the front crossover, you should thoroughly clean all its parts from dirt and re-lubricate. These are primarily springs, as well as movable parallelogram joints. To do this, you can remove it from the bike frame. It should be borne by Honor that in this case it will be necessary to re-adjust the correct position of the switch relative to the stars of the system.
- Clean and lubricate the front derailleur cables and check their integrity. Disconnect the cable from the fixing bolt on the switch and take it out through the lever on the steering wheel (this is not necessary, you can clean and lubricate the cable without removing it). We examine for a rupture of the veins. If everything is normal, then we clean the cable from dirt and lubricate it (if damage is observed, then the cable should be replaced with a new one). Then we insert it into the shifter and thread it into the shirts. We do not attach it back to the switch; this will be done during the adjustment of the transfer. If, when biting off the end piece, for example, with pliers, the end of the cable is fluffed, then inserting it back into the shifter is unlikely to work. In order to do this, the tip of the cable should be soldered with tin. To simplify this procedure, we dip it in soldering acid and solder it. Do not solder too much tin, as it will interfere with passing the cable through the hole on the shifter; it is enough to cover it with a thin layer.
To set up a Shimano front derailleur, you need the following set of tools: a screwdriver, a set of hex wrenches, and a pair of pliers. The main task here is to correctly set the speed device at the beginning of the setup.
When the device is set up correctly, the bike chain can only travel 1-2 mm from the chain toggling it. The frame moves both horizontally and vertically during gearshifts.
When adjusting the front derailleur, be sure to keep the derailleur frame parallel to the chainrings. When the device is set to the largest sprocket (i.e. set to the highest speed), the distance between the ends of the sprocket teeth and the bottom of the frame should be about 3 mm. Shimano derailleur height and rotation are easy to adjust. you just need to loosen the mounting bolt using the polyhedron. Adjust the position of the device, but do not tighten the bolt. you may need to move the device during the setup process. Now you can start setting up. Set the speed to the lowest. Unscrew the cable holder and release it. Then unscrew the cable tension grandmother until it stops and return it 1-2 turns back.
Now set the speed to maximum. You need to get the position of the device at which the gap between the chain and the part of the frame farthest from the frame will be minimal. This is done with the High screw. Rotate it, making sure that the device itself does not move.
Then test the speed control. To adjust the rear derailleur of the Shimano bike up and down, you can twist the grandmother, if the chain comes off the stars. turn the bolts: High. if with a large sprocket, Low. if with a small.
How to set up SHIMANO shifters?
Adjusting bike speeds is a delicate matter, and you can have your iron horse sent to a special service. But it’s better to learn how to do it yourself, especially since this skill is extremely useful, and there is nothing complicated in it. How do I set up a Shimano derailleur on my bike? Shimano Deore shifting is used as an example for the following instruction, as it is the most popular.
Rear derailleur setting
You can only adjust the rear derailleur after you have configured the front derailleur. The bike must be secured so that you can freely pedal and change speeds. Alternatively, turn the wheels upside down and fix on the steering wheel.
Turn on the fastest speed (smallest star). Loosen the cable by unscrewing the mount. Move the cable tension grandmother to the middle position so that you can loosen and tighten the cable. The adjustment of the rear device is carried out, as in the case of the front derailleur, with the High and Low screws. The High screw is set first. You need to find such a position in which the chain will be tuned exactly to the star, and will not slip and bounce on it.
Then shift the gear to low (the largest sprocket) and repeat all the manipulations with the Low propeller. The setting should bring the chain straight over the sprocket. After setting up the rear device, you will need to tighten the roller. Set the front derailleur to the smallest chainring, the rear derailleur to the largest. Rotate the pedals back and watch if the roller hits the cassette. Adjust the roller with the tensioner bolt. After this setup, test it “in the field”. that is, in real driving. Try rolling on a flat surface, over bumps, or downhill. Pay close attention to how the bike behaves. Adjust the switches if necessary by adjusting the granny or screws.
How to adjust the speed switch on a bike
It often happens that either the speeds on the bike are not switched clearly, or some new transmission elements have been installed. In this case, you will need to adjust the speed switch and it is quite possible to do this work on your own, without contacting specialized workshops.
How to fix defects
The speed switch will work perfectly and the bike itself will be with a new (or not very old) cable, with absolutely intact shirts (and not dry!) And not deformed (or in a small volume) stars and chain.
If the cable is just stretched, then you just need to pull it up. But if the cable breaks, then you cannot do without replacing this element. The process of replacing the cable is not difficult, the main thing is to strictly adhere to the recommendations of the specialists:
- unscrew the cable fixing screw, which is located on the cross-over;
- pull the cable out of the shirts;
- if necessary, disassemble the shifter and pull the cable out of it;
- a new cable must be inserted into a special groove in the shifter, and it is the metal tip of the cable that must enter into the groove;
- lubricate the entire cable with a special grease, you do not need to spare the consumable;
- pass the cable through the shirts;
- there are special grooves on the frame, into which shirts are tucked;
- fasten the cable with a screw on the front end.
In case of poor gear shifting, pay attention to the return spring. it must be clean and lubricated. To achieve this, you just need to rinse the spring under running water, dry it completely and lubricate it thoroughly.
If the frame of the rear derailleur is crooked, then this can only mean one thing. the cock is bent. If this is not critical, then you can correct the cock with your hands. you need to take the rear switch in your hand, which is fixed on the cock, and hold the frame with the other hand. Slowly pull out the problematic transmission element (cock) until relatively even setting.
Note: this “repair” of the cock is a temporary solution to the problem of shifting gears. The fact is that the rooster is a consumable that needs to be changed on time, and not constantly repaired / pulled.
In some cases, the bike owner pays attention to a deformed rear derailleur (the front derailleur rarely suffers on impact). it can also be returned to its original position with the help of hands. But if the rear derailleur is deformed too much, then it is advisable to replace it.
Note: After performing specific manipulations to repair bent / deformed parts, you should not use the bike for too long. this may end in a fall, another breakdown at the most inopportune moments. And in some cases, such carelessness can lead to a traffic accident.!
To understand the process of self-adjusting the speed switch, you need to know the definition of some specific terms, otherwise it will be difficult to understand the instructions.
- Speed switch (crossover). This is a transmission element that is specifically responsible for gear shifting. If there is a rear crossover, then it also acts as a support for the tension of the bicycle chain. The crossover (back and front) can be described as follows: it is a parallelogram mechanism equipped with a powerful return spring, on which the frame is fixed. The rear derailleur has two rollers inside the frame. if the level of cable tension increases, then the frame shifts the chain to large stars, and if this cable tension decreases, then the chain is shifted towards small stars with the help of the frame. The mechanism of the front derailleur works in the same way.
- Shifter. It is designed to switch speeds by changing the tension level of the cable. Most often, the shifter is located on the handlebars, but in some bicycles it can also be located on the lower tube of the frame triangle. Note:shifters and speed switches have a common connection on the steering wheel (this is provided by a cable) and are covered with a jacket.
- Cassette. This is the name of the rear transmission unit, which consists of stars of different sizes (of different diameters and with a different number of teeth) and is installed on the rear hub drum. If the bike is old, then a ratchet is used instead of a drum in the rear hub.
- Cock. It is a metal part that helps maintain the integrity of the frame and rear derailleur in the event that the vehicle has been hit. The rooster is always attached to the frame, and a cross-over is already attached to this metal part. When a blow occurs, it is this very cock that breaks, and the frame and the speed switch (crossover) remain intact.
- System. This is the name of the front transmission unit, which consists of stars of different diameters and with a different number of teeth. These stars are fastened to each other and the connecting rods with special hollow bolts on the connecting rods, but you need to know that there are no hollow bolts in cheap bicycles. the stars and connecting rods are riveted to each other.
How to properly adjust the rear derailleur
To independently adjust the rear derailleur on a bicycle, you just need to strictly follow the step-by-step instructions from experts in this process. So, follow all the steps:
- Move the chain to the small sprocket with the right shifter.
- Unscrew the fixing screw and release the cable.
- Find the screw marked “H”. Use a screwdriver to adjust this screw so that the smallest star lies in the same plane with the rollers, which are located in the foot (frame).
- Pull the cable by hand and fix it with the screw.
- Check the operation of the switch, and if it does not work correctly, the chain does not switch well to large stars, then you need to tighten the cable more (either with the help of a drum or with a switch).
- Move the chain to the largest sprocket available in the cassette.
- Find the screw marked “L” and adjust it so that the tab (frame) and the sprocket are in the same plane. in this case, the cross-over will not be able to get into the spokes of the front wheel.
Why is there a violation of speed switching
To understand what action should be taken to adjust gear shifting, you need to understand what causes can lead to the problem in question. Experts identify several such predisposing factors:
- deformation of the rooster;
- stretching the cable;
- deformation of the speed switch;
- malfunctioning return spring.
How to adjust the front derailleur
There are also clear and simple step-by-step instructions for adjusting the front derailleur:
- Shifting the chain to a smaller star.
- Unscrew the fixing screw and release the cable.
- We find the screw marked “L”, with its help we adjust the position of the frame so that the chain is between the plates of the frame, but does not touch them.
- We stretch the cable, fix it with a screw.
- Now we move the chain in the cassette to a smaller sprocket. it is convenient to do this using the rear derailleur.
- With the front derailleur, move the chain to the middle sprocket and look. if the chain on the second one touches the outer side of the frame everywhere, then you need to increase the cable tension using the drum located on the left shifter.
- We switch the gear to the largest sprocket in the cassette and check. if the chain touches the walls of the frame, you need to move the last element so that the chain is located in the middle. This manipulation can be done using the screw marked “H”.
Pros and cons of an external system
- high probability of breakage if dropped;
- switching only when driving;
- frequent chain wear;
- high degree of influence of external factors on work.
This mechanism is rarely found on mountain riding models, but is often applicable to city bikes. It is based on the work of the planetary hub, which is located at the back and contains the entire mechanism for shifting inside it. Thanks to this design, only one chainring in the front and one in the back can be seen on the outer casing of the bike. The number of speeds of this design is also quite large. In addition, a brake mechanism is mounted in the structure.
Front external flip mechanism
It is a structure with a moving frame inside that passes the chain through itself. Thus, when changing gears on a bicycle, along with the movement of the frame itself, the chain also moves to the desired sprocket.
The principle of operation of the mechanism is still not its only parameter when choosing, since such designs can also differ noticeably from each other in such characteristics as:
- method of attachment to the body;
- attachment angle relative to the bike body;
- cable attachment option.
Varieties of mechanisms
This principle is common to all types of mechanisms, which can be represented as an external, internal or combined system.
The first option is found on pedal vehicles much more often than others. Its work is based on the functioning of two switches at once, installed in the front and rear. To understand how gear changes are carried out on a bicycle, you should consider each of the mechanisms separately.
The principle of the mechanism
A bike model with the ability to shift speeds is most often equipped with a couple of three stars in front, called leading, and several times more stars in the back, called driven. The chainrings are positioned so that the smallest chainring is closest to the bike’s body and counts as first. The rear stars, on the contrary, are numbered from the largest, which is closest to the frame. Correct gear shifting on a bicycle should be carried out according to a certain scheme, which will not allow the chain to be too skewed, which leads to a quick breakdown of the entire mechanism.
So, for example, on a bike with three stars in front and nine in the rear, the switching will be as follows:
- The front large chainring will be used in a chain from the rear number 7, 8 or 9, provided that you are driving on a smooth track without obstacles.
- The middle chainring distributes the load along with the number 4, 5 or 6 driven chainrings for driving on country roads, uneven asphalt, in the face of wind or other obstacles.
- The third drive sprocket works in tandem with rear chainrings 1, 2 or 3 for comfortable riding on rough terrain, uphill and other tough obstacles.
Setting up the mechanism
Pros and cons of the internal system
Bicycle front derailleur selection rules. Its design and principles of operation.
The process of adjusting and adjusting the PPS of the bicycle should begin with a detailed acquaintance with the design features.
Let’s analyze the functions of all individual elements of the PPP.
- Clamp. This part is used to mount the derailleur to the bike body.
- Parallelogram product. Spring loaded product with hinges. In fact, this is the basis of the moving element of the PPS, with the function of fastening the frame.
- The guide frame consists of outer and inner sides. There is a chain in her insides.
- Bolts L and H. They are used to adjust the movement of the frame in relation to the bicycle body. Limit the degree of movement.
- Bolt securing the cable. Designed for clear fixation of this element.
Let’s move on to the principle of the teaching staff. It consists in simply throwing the chain over the selected sprocket. At the same time, in the process, when the gear is shifted from a diametrically large sprocket to a small one, the tension of the cable weakens. The spring forces the parallelogram along with the frame to move towards the body. The outside of the frame puts pressure on the chain, causing it to bounce off a specific sprocket. If it is required to transfer to a large star, the procedure is carried out in the reverse order. That is, the cable stretches and shifts the parallelogram in the opposite direction from the body. The frame, with its inner part and special hooks, casts onto a larger type of star.
Bolts L and H prevent the parallelogram from leaving the end positions.
On the basis of what parameters can you choose the best PPS modifications? To correctly answer this question, experts recommend considering three criteria:
- fastening method;
- type of cable supply;
- sprocket system specifications.
As for the method of fastening, there are three types.
- Fastening is made on the basis of “Braze-on”.
- Fixing with a clamp to the frame.
- Directly to the bicycle carriage.
The second method is the most common and reliable. Clamp dimensions vary with frame thickness.
The cable is connected to the switch in two ways:
How to Adjust a Front Derailleur
- through the top tube of the frame;
- by means of the lower frame tube.
Each of the described methods has its own advantages and disadvantages.
Now let’s dwell on the characteristics of the sprocket system. Consider all the parameters that you should pay attention to when selecting a PPP, so as not to buy an unnecessary thing.
- Determine the type of system (two or three speeds).
- Estimate the largest diameter of the sprocket. The frame depends on the given criterion for the width of the bend.
- We calculate the capacity. To do this, you need to determine the difference between the teeth of the largest star and the smallest by simple subtraction.
- We also determine the difference between the large and medium stars. Incorrect value will result in poor performance of the switch.
- Pay attention to the length of the axis. If the carriage axis does not coincide with the settings of the switch, the operation of the latter will become partial.
- Calculate the angle between the seat tube and chainstays.
Using all of the above indicators, you can acquire a suitable type of switch.
Front derailleur setting.
Shimano Mountain Bike Front Derailleur Adjustment
First, use the Shimano Bike Reverse Speed Adjustment Guide. After all, a working rear dealer is one of the requirements of the preparatory measures. Among them there are also:
- Checking the cable and shirts. Fiber unraveling and sticking in the shirt is not allowed.
- Correct installation of the gear selection unit on the frame, described in the previous paragraph.
- Disconnected cable from derailleur.
The adjustment of the mechanism is carried out strictly in the stated sequence:
- Adjust the lower gear limiter. Switch to the smallest star in the front and the largest in the back (this will be 1-1 in the shifters). Turn screw L to bring the chain as close as possible to the inner edge of the frame. In this case, the chain should not rub against the frame structure. Take this step seriously if you don’t want the chain to come off and get bitten between the carriage and the small star.
- Connect the cable to the derailleur. Before attaching, screw in the thumbscrew on the shifter until it stops, and then turn it out 1-1.5 turns. At the final stage, this will facilitate readjustment.
- Adjust the upper gear limiter. Place the chains on the largest chainring at the front and the smallest chainring at the back (for example, on a 27-speed bike, this would be 3-9). Tighten screw H to move the outer edge of the frame as close as possible to the chain. Again, the chain should not rub against the transfer.
- Adjust the precision of the forward throw with the thumbscrew on the shifter. Everyone does it differently. One of the ways is to sit on the bike and, with the help of the drum, select such a cable tension force, at which the chain freely passes from the 1st to the 2nd star and from the 2nd to the 3rd. The second way is to put the bike in place, switch to the middle sprocket and alternately put the 2nd and the penultimate sprocket in the back. The chain should not rub in these positions. The extreme method does not differ in accuracy, requires verification on the move and is unfair for cheap class transfers.
For your information. When lubricating the cable, use only a special silicone lubricant that does not attract dust.
PPP setting procedure
To begin with, it is advisable to position the bike so that the rear wheel is raised. A regular ironing board is ideal for this.
We carry out clearly sequential steps of action.
Front bulkhead replacement technology
If the front derailleur is not correctly positioned on the bike frame, it will not be able to adjust. Since the conversation about the installation methodology is brewing, it is appropriate to discuss the essence of dismantling activities.
How to set up a Shimano front derailleur on a mountain bike
Statistics say that the front “shifter” requires less maintenance than the rear one. Simplicity of design is also on the “front” side. Why, then, there are a lot of questions when installing and setting up this unit. What is the capriciousness of the front crossover? And in the end, how to do the work so that the result does not cause discontent and criticism.
Front Derailleur Installation Procedure
What should be done before adjusting the front derailleur? Usually, the adjustment is preceded by the disassembly of the PPP and its removal for maintenance. It is very important to set the front derailleur clearly before proceeding with the tuning procedure.
Many cyclists ask the question of how to install the PPP on a bicycle by independent actions. Let’s analyze this algorithm point by point.
- The ideal position is when the guide frame in the area of the longitudinal axis is parallel to the front sprockets. It is better to dismantle the chain during installation.
- Achieving the minimum distance between the frame and the large star by aligning and bending the parallelogram.
- Determine the height according to which the clamp will fix the switch. Slightly tighten the clamp fixing bolt.
- The position of the frame axis is adjusted by turning the switch. In this case, the frame should become parallel to the front star system.
- We check the distance from the frame to the largest sprocket and the parallelism parameters. Tighten the clamp clamp.
- The installation is complete. We put on the chain and go to setting