Bicycle Gear Shift Setting

How to adjust mountain bike speeds. Correct cycling gearshift setting

Modern bicycles equipped with a gear system allow you to move quickly and with minimal energy losses in any conditions: long climbs, rough terrain, roads with sharp turns, which require constant changes in speed and gear ratio. This can also include driving against the wind, off-road, poor quality asphalt. In general, the value of the transmission unit is simply colossal, especially on mountain bikes.

Despite the invaluable help, the transmission is great and requires frequent attention, care, and sometimes long and tedious fuss. One of the components that needs to be spent periodically is the shift mechanism, which consists of front and rear derailleurs. At first glance, the arrangement of these parts seems complicated. In practice, setting up gear shifting is very simple.

Why bike speeds don’t shift well

Usually, the thought of needing to fix derailleur problems comes when the chain is shifting too hard between the stars, or the gears are not shifting at all. The problem visits suddenly, as an option, you can contact the master.

However, this issue can be resolved in the service in a couple of minutes, and the money will have to be paid in an hour. Maybe you should tinker yourself?

Before proceeding with the instructions for setting up the bike speed system, let’s determine why it does not work correctly:

  • Switches are damaged. A complete replacement is needed to solve the problem.
  • Deformed cock. protection of the rear derailleur. Usually it is advised to change, but once you can straighten.
  • Spring worn or stretched cable. Replacement required, switch setting.

Very often, all the components of the transmission are in good condition, and the gears still shift poorly. New parts, or small workpieces installed in a transmission unit are a common cause of poor chain sprocket travel.

Setting switches at home

Now let’s figure out how to set up the speed system ourselves. Derailleurs on bicycles with multi-gear transmission are divided into front and rear. The latter are most vulnerable when riding in a variety of road conditions, the risk of damage is higher compared to the front ones, but the adjustment must be done at the very beginning. Obviously, the rear derailleur serves more stars, so it takes longer to set up.

Attention! If there is damage, and the tensioner is not parallel to the frame and cassette, then it will not be possible to correctly adjust the system!

Rear derailleur setting:

First you need screws L and H. they are clearly visible, no need to look. Also includes a cable adjuster, tension and fixing screws.

  • H is used to align the roller with the small rear sprocket. By tightening the screw L, we set the roller on one straight line with the large rear sprocket.
  • Set the highest speed on the shifter.
  • Tighten and fix the cable with the locking bolt.
  • Large gears should be turned on without interference, otherwise, using the adjuster, the cable is slightly weakened. Additional tension will be needed if gears are poorly reset.

Actually, the adjustment itself is made, it remains to adjust the switching accuracy. This is especially true for systems with a large number of stars. To do this, the chain is installed on a large chainring at the back and a small one at the front. By tightening the tension screw, we achieve the optimal position of the roller. as close as possible to the cassette. The same must be done and vice versa: set the chain to the maximum chainring in the front and minimum. in the back. The roller should not rub against the cassette, just be located next to it.

How to properly set up the switch in front:

  • Check device attachment.
  • Release cable tension at minimum speed.
  • Use screw L to create a gap between the derailleur body and the chain (1 mm).
  • Secure the cable with the adjusting bolt.

The same should be done with the H-screw. The maximum speed must be set, and the gap with the chain must not exceed one millimeter.

Adjust the speeds on both bike derailleurs until the chain is free to swing from one chainring to the other. If it is difficult to go, it is necessary to adjust the correct position of the cable using the adjusting bolt.

After all the manipulations, the entire system is checked. To do this, you need to ride a bike and try all the recommended gear ratios. Note that on mountain bikes, the transmission adjustment is a common periodic procedure, and if suddenly the transmission goes tight, we are not in a hurry to draw conclusions about the breakdown, but we do what is described above.

Do not think that a high-quality transmission does not need to adjust the shifting system. Yes, it may be necessary to do this less often for shimano components, but sooner or later you will still have to face.

We just saw an easy way to adjust the front and rear derailleurs. Is it really necessary? Adjustment of the shift mechanism is necessary for the transmission, like tires for a wheel. Timely assistance to the “traffic node” will allow not only to solve current problems, but also to prevent them in the future. Eliminate all inconveniences in time and ride with pleasure!

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.

Necessary terminology

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.

Things to remember:

  • Speed ​​switch (override). This is a transmission element that is specifically responsible for gear shifting. If there is a rear overhang, 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 rises, 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 bicycle models 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 model is old, then a ratchet is used instead of a drum in the rear hub.
  • Cock. This is a metal part that helps to 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 down, 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 together.

Why is there a violation of gear shifting

To understand what action should be taken to adjust gear shifting, you need to understand what causes may lead to the problem under consideration. Experts identify several such predisposing factors:

  • deformation of the rooster;
  • stretching the cable;
  • deformation of the speed switch;
  • malfunctioning return spring.

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 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.

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 with the other hand hold the frame. Slowly pull out the problematic transmission element (rooster) until relatively level.

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 in 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 using the 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 road accident.!

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 with the “H” mark. 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.

How to adjust the front derailleur

There are also clear and simple step-by-step instructions for adjusting the front derailleur:

  • Move the chain to a smaller star.
  • Unscrew the fixing screw and release the cable.
  • We find a 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 tension of the cable 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”.
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How to adjust the speed switch on a bike

Having become the happy owner of a bike, you should be prepared for the fact that over time you will have to carry out basic maintenance of the bike yourself. Of course, if we are talking about a serious malfunction, it is best to seek help from specialists, but many manipulations can be safely performed on your own.

When should you configure? Required set of tools:

  • Screwdriver;
  • Hex key set;
  • Pliers;
  • Spare cables;

Adjusting the front derailleur

  • We put the speed switch in the following ratio: the smallest star in the front and the largest in the back;
  • Unscrew the cable;
  • Using the screw of the limiter for low gears, we adjust the position of the frame, it should be at a distance of no more than 3 millimeters from the chain;
  • Stretch the front derailleur cable slightly;
  • Switch the speed to the middle sprocket and check if the chain is touching the outer frame. If it touches, it is necessary to tighten the cable more;
  • We put the derailleur on the smallest star and check how easy it is to change gears. If the switch fails, adjust the high gear limiter screw.

Setting up the rear derailleur

  • Setting the switch to the smallest star.
  • Loosen the cable. To do this, unscrew the clamp screw located on the rear derailleur.
  • Putting the front derailleur chain on the middle sprocket.
  • We check the operation of the chain. To do this, you just need to twist the pedals. If the chain starts to fall, adjust the high gear stop screw. As a result, your rear derailleur and the smallest chainring in the front should line up.
  • Pull the cable tightly and tighten the bolt, which is responsible for fixing the tightening.
  • We begin to test the switch by clicking each speed from the lowest to the highest. If in a certain place the system fails, then adjust the tension of the cable until all speeds are easy to switch.

When adjusting the speed switch, be sure to remember that all cable manipulations must be done smoothly and very carefully. Be patient and avoid sudden movements. When loosening or tightening the bolts, do it gradually, no more than one turn at a time.

Remember that speed tuning is a very important issue that affects the overall performance of your bike. Therefore, take the drive mechanism very seriously, and once you have mastered the technique of setting speeds, carry it out systematically.!

The bike chain is one of the most important parts of your bike, so not only the overall feeling of riding, but also your safety depends on its serviceability.

The drivetrain plays a very important role in the operation of the entire bike, so you must carefully monitor the wear of its individual parts.

In order to install disc brakes on a bicycle, you can go to any bike workshop, or carry out this process yourself.

The braking system of any bike is the most important mechanical element that is responsible for your safety during the trip.

The need to remove the bike chain occurs when it needs to be replaced, cleaned or a broken link must be removed.

How to properly adjust the rear and front derailleurs on a bicycle: photo and description of the process

Despite the fact that the bicycle was invented a long time ago and, it would seem, should have been out of date for a long time, but this two-wheeled vehicle is gaining more and more popularity every year. Cycling enthusiasts prefer this type of transport due to its convenience, ease of operation, environmental safety and practicality. Not only ordinary bicycles are very popular, but also mountain, track bikes, which use modern innovative technologies. In order for the owners to enjoy cycling, they need to take care of it and monitor the condition of all parts and assemblies. If, in the process of cycling, you hear extraneous sounds, creaking, knocking and twitching during gear changes, it’s time to pay attention to such a detail as the gear selector.

Rear derailleur

The gear shifter is an important part of a multi-speed bike. Thanks to this component, it becomes possible to move in extreme conditions, which include upwind movement, ascents, poor road quality. The transmission unit must deal with all these problems. The quality of the ride and the safety of the cyclist depend on the smooth operation of the speed switch. This skill is very useful, and every bike owner should learn how to independently adjust the gear shifter. Every cyclist can make adjustments to bicycle shifters. You need to study the theory in detail by reading the instructions, or using the advice of experienced bike owners.

Before setting the derailleur, the rear derailleur must be adjusted. Placing the bike in the correct position (wheels up) will greatly facilitate the entire adjustment process. So, all the necessary details will be in sight, and it will be much easier to get to them.

Reasons for poor gear shifting:

  • physical defects of the switch parts;
  • contamination of parts. To prevent this from happening, the components of the transmission unit must be periodically cleaned of dirt, dust and old grease;
  • worn out cable with elements of damage. Such a part requires replacement;
  • damage to the cock.

If you observe damage, deformation and wear of the constituent parts, they must be replaced as they are practically irreparable.

If all parts are OK, adjust the switch. What does the speed switch consist of? The components of the speed switch are as follows:

  • Handle for gear shifting located on the steering wheel;
  • A shifter that attaches to the handlebars near the handles. Handles and a cable are attached to the shifter. It is with the participation of the cable that the impulse is transmitted from the shifter to the stars;
  • Cassette, which includes stars of different sizes;
  • front fixing mount;
  • rear derailleur, whose main function is to switch the chain to the required sprockets.

How the switches work

Using the handle and shifter, the cyclist activates the required speed. In a certain position of the handle, the cable is pulled. As a result of this tension, the frame is thrown onto larger sprockets; when the cable is loosened, it is not thrown onto small sprockets. As mentioned above, bike setup can be started from the rear derailleur. Procedure for adjusting the rear derailleur:

  • select the second star in the front block, and the smallest in the rear one and set the switch chain on them;
  • The bike’s rear derailleur system has two bolts that act as stops. One is abbreviated as H, and on the other. L. These two bolts are used to adjust the high and low gears on the stars. If during the adjustment process any extraneous sounds occur, you can get rid of them using the latch;
  • check the tension of the cable and, if the tension is not correct, use the regulator located on the shifter;
  • Test the switching quality. If the switching occurs smoothly, no extraneous sounds are heard, then you did everything right.

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.

The regulator is fixed with screws. 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, on the contrary, is the smallest.

Bicycle front derailleur

The transition to setting 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 you position the chain in the optimal position without friction and excessive chain tension. At the end of the work, be sure to check the quality of its implementation.

Correct installation of the front derailleur

You can start the front derailleur setting only 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 of dirt and lubricate.
  • Next, 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 top line of the teeth of the large gear. The gap should be minimal.
  • Adjust the degree of cable tension.
  • Place the chain close to the inside of the frame.

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 chainring 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 is stretched or deformed, 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 (fig. 3) 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. There is less hassle with such a bike, but it also has fewer possibilities. In the transmission unit of such bicycles there are only two stars: one large and one small. Multi-speed bicycles, which have gained popularity in recent years, have two sets of sprockets in their transmission units: front and rear. Each cassette contains 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 sudden jerks.
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Installing the speed switch on the bike. How to install a rear derailleur on a bike?

Having clocked many kilometers on a bicycle, I was convinced that a branded derailleur is much more important for a comfortable ride than stylish grips or leather Brooks. But it’s not enough just to buy Shimano or Sram, the quality of installation and setup is important.

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. There have been many varieties since the invention. 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.

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 chain link 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 star should be in 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 effortlessly. 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 star. 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 must 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 and 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 should be accurate, without jumping 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 deal with 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 the installation and adjustment of 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.

How to put a rear derailleur on a bike

Having traveled many roads on a bike, you are convinced that buying stylish grips and choosing the right tires is not enough for a comfortable ride, it is much more important to have a branded rear derailleur, which will be correctly installed and configured.

Something about a switch.

The gearshift mechanism was invented by Tullio Campagnolo in 1950. This discovery made a splash among bike manufacturers, who from that moment on, polls began to equip new models with this device.

The main purpose of the mechanism is to increase or decrease speeds by throwing the chain over the stars in the cassette. In addition, the rear derailleur on the bike prevents the chain from sagging by keeping it taut. than half a century has passed since the invention of the device, during which time many of its varieties have been created.

The number of gears that you can choose depends on the length of the frame: the longer it is, the more speeds are provided by the design of the bike. However, it is impossible to say unequivocally that a long frame is better, someone likes a short frame that is not afraid of stones. And here everyone is right in their own way!

What is the rear derailleur made of?

The material of manufacture can be different: from stainless steel to titanium. On budget bicycles, as a rule, steel and plastic derailleurs are installed. such products are short-lived, work poorly. Models of the middle price segment are equipped with an aluminum movement, and the most expensive ones are composed of composite, carbon and titanium.

Installing the rear derailleur on a bicycle

Owners of an old bike, equipped with a switch of an unknown brand, always reach out to “bring it to mind.” Often, with a device assembled independently from spare parts of various brands, many problems arise: from the constant throwing of the chain over the star to the complete “sabotage” of the movement. Therefore, it is easier and cheaper to “get hold of” a new one, rather than trying to adjust and repair the rear derailleur on a bicycle, which is already hopelessly damaged.

For a bike that is used periodically and only on flat roads, it is impractical to install an expensive derailleur of famous brands (Shimano, Sram, etc.). However, if you plan on rolling hills and slides, pay attention to mechanisms with a large range of speeds.

Replacing the derailleur on a bicycle: a sequence of actions

  • The replacement process begins with removing the old mechanism from the frame. To do this, open the chain link, unscrew and remove the old switch.
  • Next, to the “cock”, which is a protruding triangle with a hole, we fix a new mechanism. It should be screwed on well, but not too tight.
  • Then we install the chain on the smallest star so that the roller and the star are visually located on the same line.
  • Carefully slide the derailleur back to the largest sprocket without holding onto the roller, which is easy to bend. Thus, you will be insured against the risk of the chain hitting the spokes.
  • Using the adjusting screw, we fix the position of the switch so that it still remains opposite the large star. If the mechanism hits the star, then you can lose the spokes, too much clamping is fraught with failure of the lower gear.
  • Moving on to the cable. normally it should move freely in the shirt. It is necessary to check the absence of creases and the course itself. To do this, we install the chain on a small star, pull the cable and fix it in a taut position.
  • We check the operation of the mechanism. First of all, turn the pedals. there should be no clicks in the process, and the very switching of speeds up and down should be smooth, without jumping over the stars and without delays. At first, it is better to take a screwdriver on a bike ride. under load, the mechanism may need to be adjusted.

Regardless of the mechanism of which company you choose, sooner or later you will have to face preventive maintenance. After all, the rollers are consumables and wear out as the bike is used, so from time to time it is necessary to carry out their preventive replacement.

Many people think the rear derailleur is much easier to set up than the front derailleur. In both cases, you will have to make some effort, but this work will pay off more than comfortably while riding. If you don’t want to waste time installing the derailleur. contact us for a bike repair service.

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.

Necessary terminology

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.

Things to remember:

  • Speed ​​switch (override). This is a transmission element that is specifically responsible for gear shifting. If there is a rear overhang, 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 rises, 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 bicycle models 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 model is old, then a ratchet is used instead of a drum in the rear hub.
  • Cock. This is a metal part that helps to 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 down, 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 together.
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Why is there a violation of gear shifting

To understand what action should be taken to adjust gear shifting, you need to understand what causes may lead to the problem under consideration. Experts identify several such predisposing factors:

  • deformation of the rooster;
  • stretching the cable;
  • deformation of the speed switch;
  • malfunctioning return spring.

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 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.

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 with the other hand hold the frame. Slowly pull out the problematic transmission element (rooster) until relatively level.

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 in 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 using the 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 road accident.!

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:

bicycle, gear, shift, setting
  • Move the chain to the small sprocket with the right shifter.
  • Unscrew the fixing screw and release the cable.
  • Find the screw with the “H” mark. 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.

How to adjust the front derailleur

There are also clear and simple step-by-step instructions for adjusting the front derailleur:

  • Move the chain to a smaller star.
  • Unscrew the fixing screw and release the cable.
  • We find a 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 tension of the cable 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”.

Adjusting the front derailleur of the bike. How to setup?

Adjustment, setting the front derailleur is not difficult if you do everything carefully and consistently, but first you need to set up the rear derailleur, and then proceed to the front.

The whole process can be divided into three stages:

To set up we need:

1) Shaped screwdriver;

4) Key for 9 (in some cases, you need a 4-5 hexagon);

5) Cable and cable jacket (if yours are in poor condition);

The first stage is preparation.

First, check the cable and cable jacket (to do this, loosen the tension cable and take it out of the jacket), make sure that the cable is not unraveled anywhere, the cable jacket is not “wrinkled”. If there are no kinks and unweaving, and the cable still moves tightly in the shirt, clean it from dirt, sand and lubricate.

Next, wash and clean the front derailleur, wipe and dry well, and then lubricate all moving parts.

Twist the thumbscrew, which is located on the shift coins, almost to the very end (leave a couple of turns for adjustment). At this stage of preparation is over.

The second step is setting the front derailleur.

Position the derailleur so that, if you were looking at it from above, the derailleur frame is parallel to the chainrings. (to adjust the height and angle of the switch, loosen the clamping bolt)

In order to adjust the height, set the chain on a large sprocket, the gap between the frame and the large sprocket should be 2-3 mm. The smaller this gap, the better switching

Next, you should adjust the “blockage of the chain” (so that the chain does not fall when switching to lower and higher gears)

If you look at the switch from above, you can see two adjusting screws H.High (high) and L.Low (low). these screws are responsible for adjusting the “chain blockage”.

Place the chain on a small sprocket in the front and a large one in the back.

Begin to rotate the L.Low screw (low) until the chain is as close to the inner plate as possible, but make sure that the chain does not hit the frame when pedaling. Next, pull the cable with pliers and tighten the cable fastening screw.

Now you need to do the same with the H.High screw. We put the chain on the big star in the front and on the small back. Turn the screw H (High) until the chain is as close to the outer plate as possible, but so that when pedaling the chain does not touch the frame.

Now you need to check how the switch works by rotating the pedals (put the bike on a stand or hang the rear wheel), step by step change gears in both directions. If it does not switch well from large to small stars, it is necessary to loosen the cable by rotating the “lamb” on the coins, clockwise, and if it does not rise well from small to large, counterclockwise.

Stage three. checking the front derailleur.

After we have tested the derailleur on weight, we need to do it under load, sit on the bike and drive through the gears. The front derailleur should work smoothly and clearly, the chain should not rub against the frame

What problems can be when setting the front derailleur?

1) Incompatibility of the front derailleur and system.

It happens that when you replace or install a new switch, you have the wrong switch. In general, they are of three types: with an upper cable pull, with a lower cable pull and universal, and each switch is designed for a specific system and number of teeth. Therefore, when buying a switch, look what you had, and if you don’t know, take it with you for a sample.

2) It is not possible to adjust the front derailleur, the chain constantly rubs against the frame

First, check the parallelism of the switch installation, if everything is ok, check the system, if it is bent, if the sprockets are even, make a couple of pedals and look at them, the stars should not change the axis of rotation.

3) Friction of the chain on the derailleur frame when at a speed of 3-1.

Do not forget about the concept of “chain skew” in the position when the chain is located diagonally it is not recommended to ride. this can lead to chain stretching and damage to the front derailleur.

Also, when changing gears, do not forget to relieve pressure on the pedals.

If you are unable to adjust the front derailleur, do not hesitate to contact us, our bike workshop will be happy to help you.

Video. how to adjust the front derailleur: