How to replace the front derailleur on a bike

Replacing the cable

Before changing the shifting cable on your bike, make sure you have the necessary tools at hand: wire cutters and a set of hex keys. It will also be useful to fix in memory the position (running) of the cable before replacing.

After replacing it, be sure to adjust the switch.

replace, front, derailleur, bike

How To Remove And Install A Front Derailleur By Performance Bicycle

Meshed cable end to rear derailleur

How To Remove & Install Your Front Derailleur | GCN Tech Monday Maintenance

  • Set the rear derailleur to the position strictly opposite the smallest bicycle sprocket. Cut off the end of the rope, loosen the screw.
  • Open access to the protection cover with a 5 mm key. loosen the shifting lever and remove it.
  • Remove the cover by turning it counterclockwise. We see the tip of the cable.
  • Pull the cable out completely, helping the process through the tension regulator channel.
  • Retract the spring, release the end of the cable.
  • Installing a new cable. We stretch it and install it exactly as the old cable was. The direction of the cable can be corrected with an awl or a thin screwdriver. We check that the cable is in the same position as the old one.
  • We return the shifting lever cover, fix it by turning the latch clockwise.
  • We stretch the cable into a braid. until its tip is in the rear derailleur.
  • We check that the rear derailleur is opposite the little bike star. We attach the cable and fix it to the screw.
  • We leave 3 cm of the cable, cut off the excess with nippers or scissors, squeeze the tip.

Before using the bike, thoroughly test the functionality of the shifter and derailleur in order to ensure that the mechanism is working properly.

Now you know how to change the shift cable on your bike. The main thing is to do it in a timely manner and do not forget about the current maintenance of this mechanism.

The condition of the cable and the correct installation directly affect the quality of the bike’s control during braking. If worn or broken, you may need to replace the brake cable on your bike. How to do it yourself. in our article.

Bicycle rear derailleur setting. How to properly adjust the rear derailleur of a bicycle, the reasons for the settings failure, the steps of setting up the rear derailleur.

Replacing the bearing of the rear wheel of a bicycle will not cause you any difficulties if you understand all the nuances and features of servicing this part. The condition of the bearings, their timely maintenance and replacement is the key to safe driving.

We have a 6-position Shimano RevoShift shifter and a braided cable. The task is to replace the cable and squeeze it. The main waste is a new cable (thinner than the brake cable) for 120 rubles, which is at least 3 times cheaper than the cost of a new shifter.

This is how Shimano RevoShift looks like with a new cable:

This is what the new gearshift cable looks like:

But such a disgrace will be if you cut the cable and forget to compress it:

Shimano RevoShift opens by prying the latch with a small screwdriver (on the topmost screen, this is the lower latch):

Before that, the switch must be switched to a lower speed state in order to release the clamp and bring the coil to a comfortable state:

Then you pull out the bad cable and put the good one. During final assembly, the cable can be lubricated with an oil cloth for better movement.

How to Change Your Front Derailleur. Replacing Your Bike’s Front Mech

The easiest way to crimp a bicycle cable is with a heat shrink tube:

Cut off a piece of heat shrink, put it on the end of the cable and heat it up with a lighter. Then the cable can be cut with wire cutters without the threat of unweaving.

One of the main features of cyclists in the CIS is that a good half of the riding season does not end at all. At any time of the day and at any time of the year, cheerful cyclists roam through the cities and forests. In this article we will show you how to keep track of the standing of your shirts and cables and how to disassemble the derailleur.

How to replace the shift cable on a bicycle

Timely replacement of the gearshift cable on a bicycle is a guarantee of the normal functioning and integrity of the mechanism. In the gearshift system, the cable is the simplest and most inexpensive part. It does not require special attention during operation, but it can wear out. It doesn’t matter what model of bike you have and its cost. the cable can become unusable unexpectedly. Replacing the cable is a simple procedure, it is quite possible to do it yourself.

The bike needs a change of the gearshift cable

How to understand that you need to replace the cable? The main indicator is a malfunction of the rear derailleur. As soon as a failure is found, we check the condition of the cable.

The causes of a malfunction can be both elementary wear and the ingress of dirt and water. While the bike is new, the part will be protected with factory lubricant. Then aerosol lubricants help in the course of operation and proper care. Proper care includes several steps. With a special tool (this can be a chisel, a hacksaw or special scissors), we cut off the ends that are frayed. Lubricate the cables at least once a season. We make sure that the caps tightly close them from the external environment. We cut off the frayed parts of the braid with an angle grinder or a sharpening stone. After trimming, we correct the thin threads from the inside so that the cable does not wear out about them.

The cable needs to be replaced if you find that there are any breaks, the wires crawl out in different directions or are bent. Rusty areas on the braid and cable, damage to the braid also require replacement. In general, if you feel the tension of the stroke inside the braid, the speeds are not switched correctly, or the switching is stuck, this is a sign that replacement is needed.

This process is simple and will not take long. In order to do everything correctly and logically. your attention is offered instructions.

Purpose of cables and braids

The bike’s gearshift cable is the connecting thread between the derailleur and the derailleur. It is a very strong metal straight thread. The task of this cable is to take all the efforts and transfer them to the mechanism, thanks to which the gear selector comes into action. Depending on which gear is selected. by pressing the lever, the cable tension becomes stronger or weaker. With optimal cable tension, the switch is operational.

With the help of the braiding of the cables (jacket), the force is transmitted to the mechanism in the rear feather. The braid also protects the cable from mechanical damage. It is a twisted metal wire, usually coated on top with a polymer. At the ends there are tips, from which a section of the cable appears for adjustments.

A cable is a set of thin strands of steel that are intertwined and formed together into a reliable, damage-resistant, metal fiber. Over time, the threads can wear out and the strength of some of them decreases, thus, damaged areas appear with breaks, kinks and individual wires coming out. Therefore, the fiber is coated with a layer of polymer or stainless steel, this improves wear resistance and significantly extends the life of the rope.

In addition to mechanical influences, external factors. moisture, dirt, dust. also affect the wear of the cable. In order to protect the metal from external influences, lubricants are used, such as Teflon. one of the most durable and durable.

There are three types of braids on the market: twisted type, SIS type and improved SIS-SP type.

The twisted type of shirt is a metal wire spring covered with plastic on the top side. Inside, metal springs are treated with grease so that the cable rubbing less against the jacket. Cables with such a shirt are the most budgetary ones and are practically not produced today.

A SIS shirt is similar in type to a twisted one, but the material from which the spring is twisted is more durable. sheets of metal. A more resistant and cleaner material is also used inside. Teflon. This is the most common type of braiding today.

SIS-SP braid. parallel braided. The threads are restrained by a polymer interlayer. The length of this braid, unlike the previous ones, does not change, while the tension of the cable is regulated. This ensures more accurate shifting performance. Silicone treated inside.

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Causes of malfunctions

The first and foremost cause of poor gear shifting is usually a damaged cable and derailleur jacket. Replacing it is not difficult and identifying this malfunction is simple and easy. However, in order not to have to change the cable with a jacket once again, we recommend monitoring its condition.

Winter is ahead and this is an excellent time for inspection and replacement of the cable (if necessary). In order to check if the cable runs well inside the shirt, you need to do the following:

  • Drop the gear to the smallest star.
  • Visually inspect the jacket and end of the cable for damage or fraying. If they are, then go to step 8.
  • Unscrew the cable retaining bolt on your derailleur (front or rear) and pull the cable out of the groove in the derailleur.
  • Pull on the shirt by the shifter to expose the cable. Check the cable for dirt. If necessary, remove it.
  • With forward and backward movements, check that the cable runs smoothly. If the cable runs smoothly and without noticeable effort, we recommend lubricating the cable jacket for prevention.
  • Instead of alcohol-based lubricants such as WD-40, we recommend using some winter engine oil. Up to 25 it can provide you with acceptable lubrication properties without allowing the cable to freeze in the jacket. And when you put your bike in a warm apartment, unlike aerosols, it won’t evaporate from your shirt. You will need a regular syringe and needle to lubricate your shirt. Having previously typed a few milliliters into the syringe and pushing the cable aside, insert the needle into the cable hole and inject up to 5 milliliters of oil inside.
  • Repeat the forward movements from point 4 several times so that the oil spreads over the shirt. If you don’t need to replace the cable, you can proceed to setting the switch. How to adjust the rear or front derailleur, we told in this and in this article.
  • If you need to replace the cable, then you need to read the instructions for your shifter. Usually the cable from the shifter can be pulled out by dropping the gear onto the smallest sprocket and “pushing” it into the shifter. But first, check the “end” of the shifter for the presence of a dummy bolt in it. Before replacing the cable, this bolt must be unscrewed.
  • If there is no plug (as in my case), then most likely the cable is pulled out by a simple parsing of the shifter. In order to make it convenient for you to disassemble the shifter, it must be removed. Difficulties at this stage can only arise with the grip. By clicking on the inscription you will learn “how to remove the grip”.
  • After removing the shifter, unscrew the top cover by turning the bolt counterclockwise.
  • Important! Be extremely careful when removing the cover, make sure that the return spring does not fly out of the shifter. Push the cable as in step 8 until it comes out of its groove. Along the way, you can check the shifter for dirt inside and lightly lubricate the insides with the same oil. A couple of drops will benefit your shifter mechanism.
  • Insert a new cable and assemble the shifter. Also, don’t forget to replace the cable jacket. After replacement, proceed to setting the switch from step 6.

Inspection and replacement of the shift cable is not a tricky business. With the help of these instructions and with a minimal tool, you can replace the cable yourself without going to service. Successful repairs!

Installation and adjustment

Reference: The Shimano Tourney TX is the entry-level model, although the exterior design suggests a higher class.

And putting something more serious on an inexpensive bike used only for riding exclusively on asphalt is pointless. Switching range was important, however, as the city is teeming with hills, hills and mountains.

So, replacing the rear derailleur starts with removing the old noname from the frame. it’s time for Shimano. The link of the chain is revealed. If this is not the case, then you need to use squeeze.

The old switch is unscrewed and removed, and a new one is hung in its place and screwed to the “cock”. a protruding triangle with a hole in the frame. It is worth tightening well, but without undue enthusiasm.

We put the bike chain on the smallest star. Visually, the roller and small sprocket should be on the same line. The small star is the highest speed, therefore we adjust the position of the roller with the screw H.

Help: the letter H is an abbreviation for high gear, that is, top gear.

The next step is to insure against the possibility of the chain hitting the spokes, which is likely if the derailleur goes behind the largest sprocket. To do this, you need to move the switch to the largest star, carefully and without unnecessary effort. In no case by the roller, the mount of which is very easy to bend.

The adjusting screw fixes the position of the switch exactly so that it is opposite the large sprocket. Going behind it is fraught with the loss of knitting needles and good mood. If the switch is too tight, there will be no lower gear.

Queue for the cable. he should walk freely in a shirt. We check the progress and the absence of creases. On this switch model, you can see the place for the cable to pass. We put the chain on the smallest sprocket, tighten the cable to remove the slack, fix it. Thus, installing the rear derailleur and adjusting it are two integral, complementary processes.

Now check the operation of the entire mechanism. There should be no pronounced clicking sounds when pedaling from the rear derailleur side. Switching up and down must be accurate, without skipping and delays. And even if everything fell into place, it works accurately, quietly and without delay. for the first trip it is worth taking a screwdriver with you. Working with a load may well require minor adjustments.

Note that you will have to face such a concept as “preventive maintenance of the switch”, regardless of its price category. As the rollers, which are consumables, wear out, their timely replacement will be required.

It is believed that installing and adjusting the rear derailleur is much easier than the front derailleur. However, you will have to spend time and effort, but this work will pay off handsomely during the trip.

A bit of boring theory

The rear derailleur mechanism throws the chain over the cassette stars, allowing you to lower or increase gears (for reference, it was invented by the Italian Tullio Campagnolo back in 1950). This device also keeps the chain taut. Since the invention, many varieties have been created. A little about the main, most characteristic features.

  • Manufacturing material. From steel to carbon. The entry-level models are equipped with steel, and not always of good quality, and plastic. In the right hands, these switches even work sometimes. Models of the middle category are in most cases made using aluminum. The most expensive models can boast not only precision in work, but also titanium, carbon or composite.
  • Frame size. In theory, everything is simple. the longer the frame, the more gears you can select. However, one cannot say so categorically, since someone will prefer a short frame that is not afraid of stones, while others are interested in greater comfort in switching. And everyone is right in their own way.

You can still describe in detail the action of the spring or the options for the location of the cable for a long time. However, many good articles have been written on this topic. I will only note that there is not much difference from which side the cable enters the switch. So, now about the interesting.

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 specialists 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 harder (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 crossover will not be able to get into the spokes of the front wheel.

Correct installation of the front derailleur

You can only start the front derailleur setting after adjusting the rear derailleur. Installation is the initial step in adjusting the speed switch. It’s very important to do it right.

  • before installing the switch, it is necessary to inspect the condition of the constituent parts and, if necessary, clean them from dirt and lubricate.
  • The next step is to adjust the location of the front derailleur. On the frame, it should be located along the pipe under the saddle.
  • Set the steering angle parallel to the drive sprocket on the front cassette of the transmission unit.
  • Next, you need to adjust the gap between the underside of the derailleur frame and the upper mowing line of the teeth of the large gear. The gap should be minimal.
  • Adjust the cable tension.
  • Place the chain close to the inside of the frame.
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It is also worth paying attention to setting up the chain. The bicycle chain is a very important element, with the help of which the impulse is transmitted from one chain to another and the adjustment process takes place. The technical condition of the circuit is of great importance for the operation of the entire system. If, for some reason, the bicycle chain stretches or deforms, this cannot but adversely affect the operation of the entire transmission unit. To prevent this from happening, the chain must be periodically removed and cleaned, and then set the correct position. There are lock and lockless models of bicycle chains. They differ in the way they are connected. To remove the locking chain, it is enough to find the link with the lock and disconnect it with a screwdriver. The lockless bicycle chain is disconnected using a squeeze. This tool helps to push the link axle out and make the connector. If it skews for some reason, this can adversely affect the gearshift process.

One of the best manufacturers of bicycle parts, including derailleurs, is the Japanese company Shimano, which has a proven track record of producing products in which Japanese quality is combined with budget and price. Shimano derailleurs are suitable for all types of bicycles. Shimano derailleurs are installed on both regular touring bicycles and mountain and track bikes with gearboxes up to 33 speeds.

Another recognized market leader is Sram. The products of this company are used on bicycles of the city bike category, as well as on sports bicycles. Sram products are of good quality and affordable price for cycling enthusiasts.

Every bicycle owner who prefers this type of transport to others is obliged to understand how to switch its speeds. It is believed that the more speeds a bike has, the better it is. But in fact, speed only allows you to improve the quality of maneuvering and squeeze the maximum out of the bike’s capabilities, so then everything depends on the dynamic efforts of the person riding the bike. Conventional bicycles have a simpler design compared to high-speed ones. With a bike like this, there is less hassle, but it also has fewer options. In the transmission unit of such bicycles there are only two stars: one large and one small. Multi-speed bikes, which have gained popularity in recent years, have two sets of sprockets in their transmission units: front and rear. Each cassette consists of stars of different sizes. To switch gears correctly, you need to remember a few basic rules:

  • If your bike is not equipped with a planetary hub, you only need to switch gears on it while driving, otherwise there is a danger of damage to the bike.
  • During gear shifting, it is not necessary to apply significant dynamic forces, in order to eliminate the danger of a burst of flowers, it is advisable to change gears sequentially, without making sharp jerks.

Rear Derailleur Setting Basics

In the event that you do not have sufficient experience in using a bicycle and do not know how to adjust the rear derailleur on a bicycle, you will need to carefully study the instructions for your bike. Usually it is written in simple and understandable language, and you can figure it out without any help. If it is difficult for you to understand everything, you can contact the master who has sufficient experience in adjusting this unit.

The very same adjustment procedure must be started by checking that the roller designed for tensioning the chain is located exactly above the small sprocket. If this position is not installed, it must be set using the adjusting screw marked with the letter “H” In order to move the roller to the left, you need to turn the screw clockwise, if you need to turn it to the right. counterclockwise.

Once you are satisfied that the large gears are set correctly, you can begin installing the derailleur cable. To do this, it is necessary to thread it into the fastening screw. Further work is to tighten it harder with one hand, with the other tighten the screw itself, acting on the hexagon. If you are new to cycling and do not know how to adjust the rear derailleur on your bike, remember that the retaining screw must not be tightened to the maximum torque.

After the cable is installed, it is necessary to adjust the small gears. For this purpose, the chain is transferred to the rear sprocket of the largest diameter. After that, check that the tensioner roller is above the large sprocket, setting it in this position using the screw under the letter “L”. It is configured in the same way as above.

If your derailleur has the ability to adjust the chain tension level, adjust it. After you finish adjusting the derailleur, try changing gears on your bike while moving. They should change quickly and easily. If you feel some difficulties, then adjust the device additionally using the cable tension drum.

Bicycle Rear Derailleur Setting

It will be best if you choose the optimal settings for yourself and remember them. In the future, you can set them, already knowing which position of the adjusting screws or the drum is optimal for you. This will make cycling easier and will significantly extend the life of your bike.

Bicycle front derailleur

The transition to the setting of this mechanism is possible only when the rear derailleur is set. This feature is important to take into account before starting work. The figure shows the switch (round, black).

Leave the chain on the middle sprocket of the front block and place it on the large sprocket in the rear block. If chain friction is observed, re-engage adjuster L. To adjust stop H, the chain moves to the largest sprocket at the front and smallest at the back. The adjuster will help to position the chain in the optimal position without friction and excessive tension on the chain. At the end of the work, be sure to check the quality of its implementation.

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 at the same time 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 in the middle. This manipulation can be done using the screw marked “H”.

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.

Top Speed ​​Derailleur Manufacturers

The most famous switch manufacturers in the Russian market are Shimano and Sram. Both the first and the second proved to be excellent.

For many years there has been a heated discussion among cyclists about which company has the best equipment. So far, no one has won in this dispute. The quality, lightness and reliability of the derailers are the hallmarks of both companies.

Speed ​​bikes

Where did the switches come from? The idea to form a transmission that is easy to control was realized at the beginning of the twentieth century, but the system was not very convenient. there was an asterisk on each side of the rear wheel, and in order to “shift” the speed, it was necessary to literally transfer the chain from one sprocket to another.

Such a mechanism would have remained a standard (in practice, moreover, unused, since it was replaced by planetary models), if not for sports disciplines. In the 1950s, Italian Tullio Compagnolo invented and pioneered the modern rear derailleur.

What to do if you can’t adjust the bike’s rear derailleur

There are several methods for solving this issue. But if the standard tuning instruction did not work, to tune the rear derailleur you need to:

  • dismantle the chain, remove the cable;
  • move the switch to the chain position to the smallest star;
  • use adjusting bolts (this way you can tighten the cable);
  • set the adjusting bolt H to the extreme position;
  • move the part called the parallelogram to the big star and adjust the position of the bolt L.
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The regulator is fixed with bolts. It must be set to the extreme position. After that, the chain must be displaced in this order: the front cassette is the largest star in diameter, the rear one, on the contrary, is the smallest.

Installation and adjustment

Setting the gear selector is not an easy task, and especially for a beginner, it will be very difficult to cope with it. Better to leave it to a specialist. But the rear and front derailleurs are worth learning how to set up yourself. This requires a number 5 hex wrench and a Phillips screwdriver. It is most convenient to set up when the bike is in a position with the wheels up.

Rear derailleur adjustment is as follows.

  • The chain is thrown to the smallest sprocket by pressing the shifter on the right side of the handlebar.
  • Next, the switch is unlocked by releasing the screw that holds the cable. This is done by unscrewing the screw marked “H” with a screwdriver.
  • This screw adjusts the sprockets holding the chain so that they are positioned along the same mowing line.
  • Now you need to pull the cable, and then fix it using the screw.
  • Next, the switch is checked for proper operation. If necessary, you can improve the transition to large stars by turning the thumb counterclockwise.
  • By pressing the shifter, the chain is shifted to the smallest sprocket.
  • Use the screw marked “L” to set the switch position so that the largest rear sprocket and the switch foot are on the same mowing line.

Front derailleur adjusts slightly differently.

  • The shifter moves the chain to the smallest sprocket in the front and the largest sprocket at the back at the same time as the pedals are pressed.
  • Next, the screw holding the cable is released. This is done with a hexagon.
  • With the screw marked “L” using a screwdriver, move the frame so that the distance between its inner part and the chain is about 4 mm.
  • Then the cable is pulled and the screw is tightened that holds it.
  • To debug another star, you need to throw the chain on the back to the minimum star, and leave it on the smallest in front. If the chain touches the frame, then you need to adjust the cable with a thumb, which is located on the left side of the steering wheel. It is worth remembering that the lamb must be mixed counterclockwise.
  • The third sprocket is adjusted with a screw marked “H” and a screwdriver.

Bicycle front derailleur

The transition to the setting of this mechanism is possible only when the rear derailleur is set. This feature is important to take into account before starting work. The figure shows the switch (round, black).

Leave the chain on the middle sprocket of the front block and place it on the large sprocket in the rear block. If chain friction is observed, re-engage adjuster L. To adjust stop H, the chain moves to the largest sprocket at the front and smallest at the back. The adjuster will help to position the chain in the optimal position without friction and excessive tension on the chain. At the end of the work, be sure to check the quality of its implementation.

How to properly shift gears on a bike?

Gear shifting rules are simple and not so numerous:

  • You only need to switch when the bike is moving. If you don’t pedal, nothing will happen.
  • When switching, the load on the bike chain should not be too large. Switching should be smooth and smooth.
  • Do not switch uphill. The speed must be set in advance.
  • Correct speed change is a step change, i.e. one speed at a time. It will save the chain and nerves.
  • If you have a classic system (3×8), then each chainring has its own personal rear chainring. This will prevent chain distortions.

The large chainring is used for cruising. Average is needed for poor asphalt, dirt roads, etc. The small sprocket is invaluable for steep climbs, when driving on sand, long grass, etc.

Gear shifting on a bicycle is a complex and organic system. It cannot be divided into separate elements: everything must correspond to each other, and then the bike will “fly”.

Front derailleur

The front derailleur for a bicycle is the simpler of the two, but surprisingly a little more rare. There is a whole class of models (old sports and tourist, pleasure and cruisers) that do not use this element. This is usually done in order to simplify the design or reduce the cost of the bike.

Usually a device consists of several elements:

  • switch frame. the main element that works when switching, a circuit passes through it;
  • parallelogram mechanism. a set of joints that allows the frame to move in space without deviating from the vertical axis of the transmission;
  • fastening to the frame.
  • The frame clamp is the simplest and most common. There is some risk of error in the diameter of the clamp, but this error can be easily corrected by replacing or additional spacers. There are several clamp mountings, with one, two and three attachment points. In addition, such fasteners may differ in the point of winding the cable into the mechanism.
  • E-Type is Shimano’s proposed and de facto standard bottom bracket mounting system. It is used on full-suspension and other bicycles with a complex configuration of frame tubes.
  • Bolt fastening to the frame is a rather rare, but very reliable fastening when a seat is already provided on the frame.

Bicycle front derailleur adjustment

The purpose of this manual is to help you understand how to properly set the front derailleur on your bike. It may differ slightly on different bikes, but the procedure itself is about the same.

This guide will be very helpful if your bike has poor gear shifting and you want to adjust the front derailleur correctly. Once you finish adjusting the front derailleur, you’ll be amazed at how well your bike shifts. In addition, this guide will be helpful when installing the front derailleur for the first time.

If this is your first time trying to adjust the front derailleur on a bike, then you need some technical skill. And the best way to get them is to try and tweak the shifter. tinker with it yourself! To make it easier to understand the process of adjusting the front derailleur, there are many photos in the article.

The job of the front derailleur on a bicycle is to move the chain from one sprocket to another. The derailleur holder is moved with a cable. When the tension of the cable is released, the holder is shifted inwardly under the action of the spring. A correctly adjusted front derailleur should move the chain clearly and smoothly between the chainrings. When pedaling the bike, the holder should not rub against the chain.

To adjust the front derailleur, you need the following tools (see photo above):

  • Hex wrench (size depends on the specific front derailleur model)
  • Screwdriver
  • Coin

Now let’s get down to adjusting the front derailleur! The main thing is to do everything with pleasure.!

Position of the front derailleur stop screws.

The stop screws restrict the movement of the front derailleur in an inward or outward direction. The stop screws are identified by the letters “L” and “H”. Screw “L” limits the holder movement beyond the inner star, and the screw “H”. outside the outer star.

If there are no marks on the screws, then it is possible to establish which of them is responsible for what only empirically. Switch to the inner guide star. Turn one of the screws first clockwise and then counterclockwise. If the derailleur moves, then it is screw “L”. If not, check another screw. Turning screw “H” should not move the speed selector. Mark the screws to know which one is which.

Front derailleur height adjustment.

The first step to properly setting the front derailleur is to check your altitude. If the holder is too high above the drive sprocket, then it will not shift gears well. If it is too low, then it will not move the chain from star to star at all.

  • Shift the derailleur so that the chain is on the middle drive sprocket. This will place the outer holder plate directly above the outer star.
  • The distance between the teeth of the outer sprocket and the bottom edge of the outer holder plate must be 1.2 mm. A coin will serve as a tool for measuring the gap, since its thickness is approximately 1.5 mm. The coin should clearly fit into the slot (see photo).
  • To change the derailleur height, first release the cable tension by shifting to the smallest drive sprocket. Then loosen the gear selector retaining bolt, adjust the height and retighten the bolt. Switch back to the middle guide sprocket and check the holder height (see photo).
  • Repeat this procedure until the distance between the teeth on the outer drive sprocket and the bottom edge of the outer carrier plate is 1.2 mm.

Note: The clip of the front derailleur will usually leave a mark on the frame to guide you when you change the height.