Bicycle Speed ​​Switch Not Working

Cycling does not switch gears. Bicycle Speed ​​Switch Adjustment Instructions

Usually, advanced cyclists change the derailleurs to fit their bike exactly the equipment they want, thus making the bike fit to their needs. Beginners usually do not have to think about such an acquisition, unless a breakdown has occurred. Nevertheless, it will be useful to consider popular models.

bicycle, speed, switch, working

The first models were invented in the 50s. Basically, the gear system is the front chainring. The chain is thrown from one chainring to another, increasing or decreasing the cadence.

  • Fast pedaling at low speed. low gear. Combination of large front and back stars. It is designed to overcome mountains, off-road and similar areas.
  • Increased for high speeds. It is a large star in the front and a small one in the back.

Switching takes place using a derailer:

  • The rudder coins pull the cable.
  • The frame shifts and throws the chain onto an adjacent star.
  • Behind everything is the same. The patch moves from the tension of the cable and throws the chain.

Now you know how it works. There are two main product manufacturing companies:

On the steering wheel, the gears are measured using coins:

  • A switch combined with a handle. To change the speed, you just need to turn the drum to the desired mark indicating the gear. They are easy to use, which is why they are often used on children’s and women’s models.
  • Triggers. They control the change in the position of the cable using two levers. Can be combined with a brake lever, or can be installed separately. This combination is usually found on advanced models with a hydraulic braking system.
  • There are high class combination handles. Such a brake lever can be shifted from left to right, thus changing the gear. Analogs have been around for a long time on road bikes.

Speed ​​selector adjustment

However, there are some peculiarities:

  • First you need to adjust the position of the front derailleur relative to the frame. You need to slightly loosen the so-called adjusting screw and set the frame horizontally. This frame must be parallel to the chain.
  • The next step is to set the required front derailleur height. It is recommended to set the gap between the edge of the frame and the teeth of no more than 2 mm. This indicator is largely responsible for the quality of gear shifting.
  • With the front derailleur bezel correctly positioned in both planes, secure the screw.
  • After that, you need to install the chain on the largest chainring in the back and the smallest in the front.
  • Use the screw to release the cable. Turn until it stops, and then unscrew the so-called adjusting drum one turn.
  • Now you need to set the frame in such a position relative to the chain so that the inner side of the frame is removed by 1–2 mm.
  • Pull the cable slightly and fix the screw.
  • Now the big star of the system needs to be installed the chain.
  • Use special screw H for adjustment.
  • Check the quality of the setting.

Rear derailleur

You will need a hex wrench and a screwdriver. Place the chain over the largest sprocket in the front. At the back we put the chain on the smallest star. This is done using the speed switch, even if the settings are knocked down.

The cable on the switch is fixed with screws, which must be loosened as much as possible. There is a “drum” on the coins. It must be screwed in until it stops. And then turn it back a few turns. Rotation pulls or lowers the cable. Thus, the micro-adjustments of the switch are made. But now we are not adjusting anything, but creating the necessary range for future settings.

Find the screw H on the switch. It must be signed. Turning this screw adjusts the position of the derailleur tensioner rollers relative to the small sprocket.

Your task is to match the tensioner roller clearly opposite the small asterisk.

Now tighten the cable and fix the screw. You don’t need to pull very hard. It is necessary that the cable simply straighten out and be elastic. But it’s better to fix it as it should.

Now we throw the chain onto the largest star in the back. So far, the gears may be shifting incorrectly, because the settings are not completely finished. Don’t be scared.

At the front, the chain should be on the smallest star. And the sequence of actions is repeated. Only this time you need to adjust the position of the tensioner rollers relative to the large sprocket using the screw L. Its movement may be less noticeable, so be careful.

Now check the quality of the settings. Maybe indistinctness. To eliminate it, you need to make a few clicks with the drum. Now let’s check again the same positions where the fuzziness was.

And you also need to check the bike on the go. And to correct the indistinctness with the drum clicks. Practice will help you.

Front derailleur

To adjust, you need a hex wrench and a Phillips screwdriver.

  • We put the chain on the big star at the back. Small in front.
  • Loosen the fixing screw. The position of the frame is adjusted with a screw marked LOW. Our task is to set the gap between the chain and the left side of the frame at about 0.5 mm.
  • Now we fix the cable. It is not necessary to tighten too much. Switch to a small star in the back and a large one in front. There may be interruptions. As long as it’s ok.
  • Using the screw, set the gap between the chain and the right side of the switch frame to 0.5 mm.
  • Checking the quality of the settings. If the chain is thrown with an interference, then carry out micro-adjustments. Make no more than 1-2 turns so as not to lose the settings. Done.

Reasons for incorrect gear shifting

Many people may face some difficulties when setting switches. First, a little theory. The front derailleur does not work by itself. It works in conjunction with the stars of the system.

The stars have special nodules that are designed to make the chain switch better. The quality of switching directly depends on the state of these “pins”. If they wear out or wear out, then the switching will accordingly suffer very much.

The front derailleur itself consists of the following components:

The frame comes in different thicknesses. Internal width depends on chain width.

  • You also need to pay attention to backlash.

How to fix defects

The rooster is the bracket to which the switch is attached. This is an inherently weak link, because when the switch hits the ground, it is this component that will be damaged, and the frame will remain intact, which is much more important.

By the way, there are switches that are attached to the hub axle. The mechanical strength of the system is higher, but this only applies to extreme equipment.

Titanium frames are made with fixed roosters, since the material itself is strong. Interestingly, in English it sounds like Derailleur hangar. We have stuck the name “ cock ” because of the comb at the end.

Detachable shanks are mounted on carbon and aluminum frames. This component is cast from a large carbon aluminum alloy. Durability is low.

If the cock is bent, then it is better not to straighten it. It will crack anyway.

Roosters have different geometry. Please be careful before purchasing. On cycling trips, participants take extra roosters with them. And usually one bike is enough for two. They don’t break very often.

By the way, if the rooster is still broken, but you want to ride, then you can make a single speed:

  • To do this, take a squeeze.
  • We press out one of the pins. It doesn’t have to be a connector pin. He is thicker than the others. You must press out the pin in such a way that it does not fall out, but remains in the link. It is best to unwind not to the end and check how much the pin came out.
  • Now we shorten the chain to the desired size. It is better to move the rear wheel forward in advance. We measure, squeeze out the excess links completely. By the way, the old chain is replaced with a new one in the same way.
  • Install the chain in the squeeze with the reverse side. We press until the pin clicks. You can skip this click. Be careful, otherwise the pin will go further than necessary.
  • It is much more convenient to use a connecting pin, the long rod of which is fixed in the links, and the excess is removed with pliers.
  • Now we move the wheel, so the chain will stretch a little.

Setting up your bike derailleurs is easy. You do not need to have special skills and knowledge for this. Follow the instructions and you will succeed!

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.
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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.

Why gear shifts poorly on a bike

On entry-level bicycles, the transmission of the cheapest groups is installed, and when the gears start to shift poorly and jam, the owners just shrug their shoulders. what, they say, you can take from cheap rubbish.

A big surprise befalls those who buy a much more expensive bike, and after a while again encounter shifting problems. The point here, of course, is not karma, but the wrong attitude to technology.

I am by no means claiming that there is no difference between starter and top-end components. Of course, the experienced cyclist with eyes closed will distinguish the Shimano Alivio from the XTR in three clicks.

But the reasons for the fuzzy operation of the transmission do not so much depend on the class of the transmission, but on its condition and settings. In this post, I will not talk about how to configure the switches, for this a separate article will be released soon, subscribe, and I will send you a notification about its publication.

Causes of fuzzy operation of gear switches

Cables and shirts. This is the most common problem, especially for beginner cyclists. I just wonder what a terrible condition some cyclists are in.

At the end of the cable, there must be an aluminum cap that protects it from fluffing. With pliers, you can carefully remove it and unscrew the bolt securing the cable to the rear derailleur.

Release the jacket from the stops by carefully removing it from the cable. The cable itself can be left in its slot in the shifter. When he is completely naked, once again inspect for raised threads and scuffs. Spray WD40 on a rag and wipe it thoroughly.

The shirts, if they are in order, can also be used a second time. Fill them with more WD40, and gently rub there with a cable. The task is to drive out all the dirt that has accumulated during the riding period.

Here I ask you to take into account the following thing. cables and shirts do not need lubrication. Never lubricate them with thick greases, such as grease. Literally after a few trips on the ground, you will have a consistency in your shirts, consisting mainly of dirt.

If you need to calm the soul, then spray with Teflon spray, it dries quickly, but leaves a thin gliding layer. Which, however, will be erased after a dozen switches.

One more point. There are Teflon-coated cables, such as Shimano XTR Cable, which cost quite a lot of money. In the days of fetishism, I used only these, because of the sliding cover, the effort on the shifter is slightly less.

Unfortunately, after about a year of active skating, Teflon in places of friction is completely erased. However, these cables have a very big advantage. they come with spout stops, which effectively prevent dirt from getting in.

Returning to shirts, make sure that nowhere are too long, or vice versa, short sections, because of this, there will be increased friction in the bending places, and sooner or later dirt will accumulate there.

The bent cock. If you do not know what this part is, then here you can read a note about a bicycle cock. Sometimes it happens that a seemingly perfectly tuned rear derailleur does not work clearly, despite fresh cables and shirts.

The reason may be that during transportation, the bicycle is clamped somewhere, and the cock bent slightly. If you cannot achieve a clear gear change, then remove the cock and put it on the table.

If it is slightly crooked, then you need to bend it. Do not overdo it, aluminum can give microcracks. How exactly to bend it. I will not advise. I do it in an artisanal way. I put it on the bike and pull it with my hands. Ideally, you need to edit with a special typewriter, which even takes into account the asymmetry of the dropouts.

Rear derailleur play. Move the rear derailleur towards you and away from you, keeping where the cable goes. Ideally, there should be no backlash at all, but a small free play does not represent anything criminal, especially on the initial transmission groups.

During operation, this backlash tends to increase, and then delays in switching, fuzziness, etc. begin. If everything is in order with the ropes and the rooster, then with fine tuning you can overcome the negative effect of backlash.

Most often, the reason that the bike shifts poorly is a complex of problems. Dirt in shirts, a slightly bent cock, a slight backlash in the switch, poor tuning. all tolerances add up.

over, many Catalans drive like this, and find it normal when the speeds are switched on the principle of three forward, two back. Guys, this is not normal!

Any drivetrain, even the lowest Shimano Tourney, needs to work well. Do not get used to the bad, otherwise even buying an expensive bike, after a season or two you will get the same.

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What to do if your bike’s derailleur is broken

Transmission components must be kept in good condition at all times, lubricating the chain in good time, adjusting switches and troubleshooting.

As the kilometers increase on the bike, individual parts wear out, and if maintenance is not performed on time, the part may become unusable altogether. In this article we will look at the most common problem associated with speed derailleurs.

It must be understood that the speed changes only when the chain moves forward. If you jerked the shifter, then you need to rotate the pedal so that the chain spreads from one star to another. If clicking or any other extraneous sounds are emitted when switching, you need to adjust the switching.

The main reasons for inaccurate switching:

  • The transfer cable is torn, stretched, or is on the verge of breaking.
  • The switch itself is broken or the spring in it is worn out.
  • Roller teeth are worn down.
  • Switch needs to be adjusted.
  • The chain or cassette is worn out.
  • There is a lot of dirt in the chain.

Transmission repair stages

Repairs include adjusting the front and rear derailleurs, as well as checking the condition of the cables, chain, cassette and rollers.

  • Unscrew the bolt holding the cable.
  • Disassemble the shifter and remove the cable from it and from the shirts. Shirts are also recommended to be replaced!
  • Clean shirts and put a drop of oil in them for better cable glide.
  • Thread the new cable through the shifter and then into all shirts.
  • Start configuring the switch.
  • Bite off the excess part of the cable and secure the end with a special tip.

If you see that the teeth of the transfer rollers or cassettes have worn out, they must be replaced with new ones. Worn cassette or rollers rotate the chain, and the quality of gear shifting on the bike suffers greatly.

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Over time, the chain deteriorates. It is recommended to keep several chains in stock and change them every 100 kilometers, because the wear of the chain will deteriorate the cassette. Multiple chains will wear out more slowly and your cassette will last longer. You can determine the state of the chain using a special tool. It is impossible to repair the chain, you just need to replace it if necessary.

If the chain is in good condition, simply remove it, clean and lubricate. Remove excess with a napkin or dry cloth.

Rear derailleur

Make sure the cock is level first. If it is still bent, you can contact the service to straighten it, or try it yourself. You can also simply replace it. For 2016, for roosters are only about 300-900 rubles. Do not even try to tune the derailleur with a bent cock, as the gear adjustment on the bike will fail.!

Some firms produce the so-called cock guard, which is attached to the frame. Do not buy it under any circumstances! A rooster is a consumable component that can and should be replaced if it breaks. When hitting this very protection, the cock will remain intact, but the frame may crack. The frame is harder and more expensive to change.

When you are convinced that the rooster and the rope are in good condition, you can proceed to the actual setting.

Place the chain on the largest chainring in the front and the smallest in the back.

Unscrew the bolt holding the rear transfer cable.

By rotating the bolt marked “H” you need to make sure that the switch rollers lie in the same plane with the desired sprocket.

Then pull the cable slightly and tighten the bolt holding it. Over-tensioning the cable will make the transfer difficult.

Shift the speed to the lowest (i.e. the largest star in the back and smallest in the front).

Rotate screw “L” until the derailleur rollers line up against the large star.

Check if gear changes are good.

If shifting is not correct, use the thumbscrew on the shifter, which changes the cable tension.

Now that you have set up the rear derailleur, you are ready to adjust the front.

Front crossover

It is important to set it up especially accurately, since if the adjustment is not good enough when changing speeds, the chain can fly off or even break. The sequence of your actions will be as follows:

Use the rear shifter to shift to the middle sprocket so that there is no strong chain skew.

Then put the chain in first gear and unscrew the bolt securing the cable.

Use the screw “L” to move the transfer frame so that the distance from the chain to the switch on the left and right matches.

Without too much tension, place the cable and secure with the bolt.

Switch to the biggest star in the front.

Tighten the screw “H” so that the chain is again exactly in the middle of the frame.

Check adjustment results and achieve maximum shifting accuracy with the thumb on the shifter.

If the shifter triggers are too tight, loosen the cable tension.

Switching recommendations

Drive only at speeds that will not cause the chain to tilt too much. For example, you cannot set the speed to 1/8, 1/10, 3/1 (the first number is forward gear, the second is reverse) and so on. For the smallest front chainring, you can turn on 1–4 speeds at the rear, for the middle. 3–7, for the largest. 7. If you nevertheless put an incompatible gear, there will be a risk of chain jamming and spinning, as well as an increase in its wear rate.

On a speed bike, fast gear changes are very important, especially if you are competing. Transmission repairs should be carried out before the race, and then after, as aggressive driving may cause the shift adjustments to go off. If you do full maintenance of your bike at least once a season, then it will serve you for a very long time.!

Cycling does not switch gears

Transmission components should be kept in good condition at all times, lubricating the chain promptly, adjusting switches and troubleshooting. As the kilometers increase on the bike, individual parts wear out, and if maintenance is not performed on time, the part may become unusable altogether. In this article we will look at the most common problem associated with speed derailleurs.

What it all depends on and what to do

Starter bikes have the cheapest transmissions, and the gears are poorly shifted and jammed. An experienced cyclist can quickly determine the drivetrain level. The point is that its disordered work is not always associated with the class, but more depends on the setting and state. Let’s try to list most of the factors causing such problems.

It must be understood that the speed changes only when the chain moves forward. If you jerked the shifter, then you need to rotate the pedal so that the chain spreads from one star to another. If clicking or any other extraneous sounds are emitted when switching, you need to adjust the switching.

The main reasons for inaccurate switching:

  • The transfer cable is torn, stretched, or is on the verge of breaking.
  • The switch itself is broken or the spring in it is worn out.
  • Roller teeth are worn down.
  • Switch needs to be adjusted.
  • The chain or cassette is worn out.
  • There is a lot of dirt in the chain.

Cables and shirts

This problem most often occurs among novice cyclists. It is enough to click the shifter or even remove the cable from the shirt and inspect it for dirt. In addition, the cable can be unwound somewhere, which will greatly affect the shifting.

Deformed rear derailleur bracket

There are times when a seemingly perfectly tuned rear derailleur malfunctions, despite new cables and shirts. The reason may be that the bike was caught somewhere during transport and the bracket bent slightly. If it is not possible to establish a clear gear change, then it is worth removing the cock and putting it on the table. Crooked? You need to fix it. But it’s important not to overdo it, as aluminum cracks.

Bent cock

It sometimes happens that a seemingly perfectly tuned rear derailleur doesn’t work well despite fresh cables and shirts. The reason may be that during transportation, the bicycle is clamped somewhere, and the cock bent slightly. If you cannot achieve a clear gear change, then remove the cock and put it on the table.

If it is slightly crooked, then you need to bend it. Do not overdo it, aluminum can give microcracks. How exactly to bend it. I will not advise. I do it in an artisanal way. I put it on the bike and pull it with my hands. Ideally, you need to edit with a special typewriter, which even takes into account the asymmetry of the dropouts.

Rear derailleur play

Move the rear derailleur towards you and away from you, keeping where the cable goes. Ideally, there should be no backlash at all, but a small free play does not represent anything criminal, especially on the initial transmission groups.

During operation, this backlash tends to increase, and then delays in switching, fuzziness, etc. begin. If everything is in order with the ropes and the rooster, then with fine tuning you can overcome the negative effect of backlash.

To prevent damage, you need to be able to switch gears correctly.

How to switch gears correctly?

By the way, we recommend:

Correct gear shifting allows you to ride easier and more comfortable with less effort, as well as increase the service life of all elements of the bicycle transmission. We have prepared several rules and recommendations on how to properly switch speeds on a bike:

  • You can switch speeds only on the move, that is, while pedaling.
  • For correct and smooth shifting when shifting gears, it is necessary to reduce the load on the pedals.
  • Switching speeds should occur sequentially, you do not need to jump over several speeds at once.
  • When going uphill, you should not throw the chain between the chainrings, but between the rear stars it is quite acceptable. If there is a slide in front, it is better to change the speed before you enter it.
  • If, after switching the gears, extraneous sounds are heard, it means that the switching did not occur and it is necessary to press the shifting lever.

If the fault diagnosis and adjustment is carried out correctly, in accordance with the algorithm, it lasts for a long time. Often in practice, they are limited to setting the rear derailleur. Timely elimination of violations in the system will allow the transmission to serve for a long time without failures. To reduce the wear rate, it is necessary to use the correct speed system.

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BIKE SPEED SWITCH: HOW TO SET UP AND SWITCH CORRECTLY

Bicycle gearshift is a transmission component that directly serves to shift gears. Correct speed regulation is an important part of a comprehensive approach to comfortable and safe cycling. Next, let’s talk about why you need a speed switch on a bicycle, what types there are, how to set up and how to switch speeds correctly on a bicycle.

BICYCLE SPEED SELECTOR, WHAT TYPES ARE

Bicycle gearshift is a transmission component that directly serves to shift gears. Gear shifting for a bicycle is a very important and sometimes very necessary function for a bicycle, which allows you to efficiently distribute the energy expended on the force directed to pressing the pedals and the frequency of their rotation.

The gear ratio between wheel and pedals that changes and allows this distribution to occur.

There are several types of switches:

  • external switching mechanism;
  • internal switching mechanism;
  • combined mechanism.

Let’s consider them in more detail.

INTERNAL SHIFTING MECHANISM

This type of derailleur uses planetary bushings. In this case, the shifting mechanism is hidden inside the rear hub, which results in one sprocket on the front wheel, a chain, and one sprocket on the rear wheel.

The current planetary hubs have a different number of gears (from three to fourteen), they can also have a built-in brake.

Such mechanisms are mainly used on walking and road bicycles, very rarely on mountain bikes.

Consider the merits of these switches:

  • increased resistance to weather and road conditions (parts of the mechanism are in the case);
  • the presence of a built-in brake;
  • they are quite reliable and durable;
  • such a mechanism allows you to change gears without pedaling;
  • fairly simple maintenance.

However, such mechanisms also have disadvantages:

  • rather heavy weight;
  • complication of movement may occur due to strong friction of the nodes;
  • it is impossible to repair the mechanism in field conditions.

EXTERNAL SWITCHING MECHANISM

These derailleurs are used much more frequently on bicycles. Gear shifting takes place using two switches: rear and front. Let’s consider each of them in more detail.

Front derailleur

Its design allows the chain to be transferred from one to the other on the chainrings. It works like this: inside there is a moving frame through which the chain passes.

When you need to switch the speed, this frame moves (it becomes above the desired star) and, accordingly, moves to the chain star.

The front derailleurs differ in several ways:

  • There are several ways to attach them to the frame. The first way is to use cable ties to attach the switch. You can also use the second method (especially for frames with non-standard geometry). clamping the plate that holds the switch with a cartridge or carriage.
  • Also, there may be different angles of installation of the switch relative to the frame (you should select this parameter correctly and accurately so that you can correctly shift gears).
  • Another parameter that may differ is how the cable is attached. It can be connected to the switch from above or below (there are models that have both connection methods in their design).

For all front derailleurs, it is not possible to swing the chain under load. Of course, almost all manufacturers are trying to find a solution, but emerging systems are expensive and often ineffective.

Rear derailleur

It does the same job as the front one, but it has more stars (up to nine), and there is also a special frame in its design that provides chain tension.

Such switches also differ in certain characteristics:

  • Rear derailleur for each type of bike.
  • Fixed size of the largest star.
  • Different cable lengthening when moving the switch (its pitch).
  • Switch capacity (difference between the size of the largest and smallest stars).
  • Traction type (forward or reverse thrust).
  • Mounting type (with a rooster or directly to the frame).

Pros of these switches:

  • simple construction;
  • little weight;
  • small price;
  • the number of gears such switches have a lot.

Disadvantages of such switches:

  • strong influence of external factors;
  • high chain wear;
  • frequent switch maintenance;
  • a high probability of breakdown if the cyclist falls;
  • gear shifting is not possible if the bike is stationary.

COMBINED GEAR SHIFTING MECHANISM

Such mechanisms are hybrids of a conventional shift mechanism and a planetary hub.

Such mechanisms are in most cases installed on city bicycles. On other types of bicycles, they have not gained their distribution, since they have all the disadvantages that internal and external switching mechanisms have.

BIKE SPEED CHANGE. WHEN YOU NEED?

Let’s figure out how and when it is necessary to switch speeds on a bicycle, i.e. find out the principle of gear shifting.

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Most bicycles have two to three chainrings at the front and seven to ten chainrings at the back.

The front stars are numbered from small to large, and the rear stars are numbered from large to small. Consider how the gear changes on a bicycle, three stars in the front and eight stars in the back:

  • The large chainring is used when you are driving on a level, good road and there is no strong wind blowing towards you. This star assumes the use of led stars numbered 4-8.
  • The middle sprocket is designed for driving on dirt roads, sand and uneven asphalt. The trailing stars that are used with it are numbers 2-6. This star will allow you to ride if the headwind is strong enough.
  • The small chainring is designed for uphill climbing, and also if you are driving in mud, sand, swampy soil, thick grass. The rear sprocket numbers that are used with it are 1-5.

Incorrect operation of these mechanisms will shorten their service life. For example, if you allow the chain to be strongly skewed.

When choosing gears, keep in mind the concept of “cadence”. This word refers to how fast your bike pedals are. The cadence depends on the number of revolutions per minute. For comfortable movement, it should be equal to somewhere between 80-110 rpm.

Therefore, it is worth choosing gears so that the cadence is kept around 80-110 revolutions. When starting, you should not immediately take high gears.

It is better to warm up the muscles at light speeds and reach a comfortable cadence, and then you can shift higher gears. As your riding experience improves, you will learn to intuitively sense which gear to shift and when.

HOW IT IS CORRECT TO SWITCH SPEEDS ON A BIKE: A FEW PRACTICAL TIPS

Every cyclist should know how to properly switch speeds on a bike. Correct gear shifting will allow you to drive much faster and more comfortably with less effort, and in addition, this will increase the life of the sprockets and chain.

The first thing I would like to note is, always select the gear so that it is easy to pedal (cadence 80-110 rpm).

So, what you need to know to properly shift bike speeds?

Modern bicycles have a chain drive. This means that when the cyclist pedals, he transfers the force from the pedals to the cranks, and then to the system stars, which are located on the front wheel (leading), and then, accordingly, to the driven cassette stars. Ending effort on spinning the wheel.

If we consider switching speeds, then the essence is to drag the chain from one star to another. Of course, while choosing the correct star size.

Let’s take an example of the correct speed switching algorithm. We put the middle sprocket in the front and start off. We select the gear with the rear derailleur, taking into account that there is no heavy load on the legs.

If the road goes uphill, then we throw the chain onto the large star in front. We carry out this principle of action with low gears, when we are going uphill, and there is not enough range of cassettes, with the middle front sprocket on, then we go to small.

Most importantly, remember that the middle chainring is the working chainring, only there will be no significant chain skew from it. If you take into account all of the above while cycling, then the transmission will last for a very long time.

TIPS AND RECOMMENDATIONS

  • The bike speed switches only while driving.
  • If you change speeds, then before that you should reduce the pressure of your feet on the bicycle pedals.
  • If you have a slide on your route, it is better to change the speed before going up.
  • Switching speeds should be done gradually, do not jump over several speeds.
  • And most importantly, make sure that a large skew of the chain is not allowed, as this will significantly reduce its service life.

By following these simple rules, you can increase your level of riding, and also cycling does not turn into torment for you.

HOW TO SET UP THE BIKE SPEED SHIFT

Over time, every cyclist has trouble shifting gears. Either you cannot switch from one gear to another. you jump over a couple of stars, or you cannot switch at all. This is where there is a need for awareness of how to set up gear shifting on a bicycle.

Setting the speeds on a bike is not a complicated procedure (although at first glance it seems like that). If you are setting up two switches, start from the rear.

HOW TO SET THE REAR SWITCH

First you need to make sure it is not bent (the chain tensioner is parallel to the cassette stars). Now let’s start adjusting.

At high speed, the chain should be on the small star of the cassette. We put everything in this position. To adjust, we need to find two screws (in the figure they are designated H and L).

Screw H must be tightened so that the derailleur roller is in line with the small star. In the same way, screw L should be tightened. the roller should align with the large sprocket.

After that, we pull the cable (the maximum speed is on the shifter). It should fit exactly into the groove near the fixing bolt (number one in the picture). Now it should be tightened.

We fasten the cable with a stretch. Check if high gears engage well. If not, loosen the cable with the adjuster (marked with number two). Also check if the speeds are reset well (if bad, then tighten the cable while unscrewing the tension adjuster).

The last item in the rear derailleur adjustment will be to set the smoothness when shifting gears. To do this, you need to put the chain on a small star in the front and a large one in the back.

The tension screw (marked with number three) should be tightened so that the top roller on the rear derailleur is as close as possible to the star, but does not touch it.

Now put the chain the other way around (in the front on a large sprocket, and at the back on a small one). the roller should not touch the cassette sprocket either.

HOW TO SET THE FRONT SWITCH

It is easier to adjust, but make sure it is properly secured before adjusting. We set the minimum speed, weaken the tension of the cable, and turn the screw L. There should be a gap of one millimeter between the frame and the chain.

Now the cable should be secured with a screw (number four in the picture). There must be good tension and at the same time it must lie in a special groove near the screw.

Now we set the maximum speed and do the same for the screw H. We achieve a gap of one millimeter. Adjust to the extent that the chain sits well on the large chainring.

Now you can ride your bike. If there is poor switching to smaller stars, then you should twist the cable tension adjuster (located on the shifter on the steering wheel) to loosen it.

The same action should be done if poor shifting to large sprockets occurs (only the cable should be pulled).

That’s all we hope you did it!

What to do if your bike’s derailleur is broken

Transmission components must be kept in good condition at all times, lubricating the chain in good time, adjusting switches and troubleshooting.

As the kilometers increase on the bike, individual parts wear out, and if maintenance is not performed on time, the part may become unusable altogether. In this article we will look at the most common problem associated with speed derailleurs.

It must be understood that the speed changes only when the chain moves forward. If you jerked the shifter, then you need to rotate the pedal so that the chain spreads from one star to another. If clicking or any other extraneous sounds are emitted when switching, you need to adjust the switching.

The main reasons for inaccurate switching:

  • The transfer cable is torn, stretched, or is on the verge of breaking.
  • The switch itself is broken or the spring in it is worn out.
  • Roller teeth are worn down.
  • Switch needs to be adjusted.
  • The chain or cassette is worn out.
  • There is a lot of dirt in the chain.

Transmission repair stages

Repairs include adjusting the front and rear derailleurs, as well as checking the condition of the cables, chain, cassette and rollers.

  • Unscrew the bolt holding the cable.
  • Disassemble the shifter and remove the cable from it and from the shirts. Shirts are also recommended to be replaced!
  • Clean shirts and put a drop of oil in them for better cable glide.
  • Thread the new cable through the shifter and then into all shirts.
  • Start configuring the switch.
  • Bite off the excess part of the cable and secure the end with a special tip.

Over time, the chain deteriorates. It is recommended to keep several chains in stock and change them every 100 kilometers, because the wear of the chain will deteriorate the cassette. Multiple chains will wear out more slowly and your cassette will last longer. You can determine the state of the chain using a special tool. It is impossible to repair the chain, you just need to replace it if necessary.

If the chain is in good condition, simply remove it, clean and lubricate. Remove excess with a napkin or dry cloth.

Rear derailleur

Make sure the cock is level first. If it is still bent, you can contact the service to straighten it, or try it yourself. You can also simply replace it. For 2016, for roosters are only about 300-900 rubles. Do not even try to tune the derailleur with a bent cock, as the gear adjustment on the bike will fail.!

Some firms produce the so-called cock guard, which is attached to the frame. Do not buy it under any circumstances! A rooster is a consumable component that can and should be replaced if it breaks. When hitting this very protection, the cock will remain intact, but the frame may crack. The frame is harder and more expensive to change.

When you are convinced that the rooster and the rope are in good condition, you can proceed to the actual setting.

Place the chain on the largest chainring in the front and the smallest in the back.

Unscrew the bolt holding the rear transfer cable.

By rotating the bolt marked “H” you need to make sure that the switch rollers lie in the same plane with the desired sprocket.

Then pull the cable slightly and tighten the bolt holding it. Over-tensioning the cable will make the transfer difficult.

Shift the speed to the lowest (i.e. the largest star in the back and smallest in the front).

Rotate screw “L” until the derailleur rollers line up against the large star.

Check if gear changes are good.

If shifting is not correct, use the thumbscrew on the shifter, which changes the cable tension.

Now that you have set up the rear derailleur, you are ready to adjust the front.

Front crossover

It is important to set it up especially accurately, since if the adjustment is not good enough when changing speeds, the chain can fly off or even break. The sequence of your actions will be as follows:

Use the rear shifter to shift to the middle sprocket so that there is no strong chain skew.

Then put the chain in first gear and unscrew the bolt securing the cable.

Use the screw “L” to move the transfer frame so that the distance from the chain to the switch on the left and right matches.

Without too much tension, place the cable and secure with the bolt.

Switch to the biggest star in the front.

Tighten the screw “H” so that the chain is again exactly in the middle of the frame.

Check adjustment results and achieve maximum shifting accuracy with the thumb on the shifter.

If the shifter triggers are too tight, loosen the cable tension.

Switching recommendations

Drive only at speeds that will not cause the chain to tilt too much. For example, you cannot set the speed to 1/8, 1/10, 3/1 (the first number is forward gear, the second is reverse) and so on. For the smallest front chainring, you can turn on 1–4 speeds at the rear, for the middle. 3–7, for the largest. 7. If you nevertheless put an incompatible gear, there will be a risk of chain jamming and spinning, as well as an increase in its wear rate.

On a speed bike, fast gear changes are very important, especially if you are competing. Transmission repairs should be carried out before the race, and then after, as aggressive driving may cause the shift adjustments to go off. If you do full maintenance of your bike at least once a season, then it will serve you for a very long time.!