How to install a gearshift cable on a bicycle

How to change the cable correctly

There are several different cables on the bike that need to be changed in different ways.

    Change the gear shift cable. To do this, we need several tools: wire cutters, several hex keys, or one 5 mm hex adjustable wrench. In principle, the scheme of operation of changing the rear and front gearshift cables is quite similar in general terms. In the case of the front derailleur, before moving on to work, you should weaken the forward gear, transferring it to a “lighter” one. The rear derailleur is installed against a small sprocket. After that, the clamping screw is loosened, and the end of the cable is also cut off. So that in the future there are no problems with the installation of gear shifting, it is at this stage that you should carefully study the location of the clamped end of the cable. It can be either the top or the bottom of the screw.

Then you need to get access to the protective cover: using the key, loosen the shifter and remove it. Then remove the cover by turning it counterclockwise. The cable has now been accessed. Examine the diagram that opens in front of you. you need to completely pull the cable out. When this is done, a new cable can be installed. Sometimes, to simplify the task, an awl is used here to push the cable through. After completing the steps, check that the new cable is in the same position as the old one.

Then we put the shifting lever back in place, fix it, and attach the shifting lever to its main position.

At the very end of the procedure, the installed new cable is pushed into the sheath. If this does not work and the cable is pushed with great effort, most likely the sheath will also have to be replaced. The reason may lie in its deterioration. this is the most common option. The cable pulled out from the back is set in the correct position and secured with the fixing screw.

The excess part of the cable is cut using nippers, but leaving about 3 cm. The end is squeezed. Before setting off, you need to test the bike’s performance and test it on different road surfaces. If you have any trouble, you need to try to repeat the operation again or change the cable again.
We change the brake cable. This operation is only required if the movement of the cable is difficult or if the shirt is worn out. Carefully monitor the condition of each of these parts and replace as necessary. Otherwise, it may be difficult to put the brake levers back in place. Friction of the cable may also occur. If you find it difficult to work with one of these elements, you should change both of them. First of all, you should unscrew the screw with which the cable connects to the brake lever. Watch out for the safety of metal anthers, as they can often be lost during work. Then we unscrew another screw, which is located on the brake lever. You can do this with your fingers. Now it is enough to straighten the shirt so that the cable can be easily removed.

Then we proceed to the procedure for replacing the shirt. To do this, we fit a new shirt in length, cutting it off with pliers. Be sure to keep the edges straight so that the cable fits easily. Then we install the metal tips. Now we pass the cable through the shirt. A distinctive feature of a well-chosen part will be the free passage of the cable over the shirt.

The structure is ready and now is the time to put it in place. We attach the cable to the brake lever, fasten the adjusting screw. Then the anthers come into play: they need to be put on the unattached end of the cable with the side where the narrowing occurs. This detail is also a must in the design: it prevents dirt from entering the shirt.

Then you need to tighten the cable. To do this, move the levers, then tighten the cable and fix it with the corresponding screw. Before using the two-wheeled vehicle, we check the quality of the work performed and stretch the new cable. To this end, the brakes are pressed firmly several times. Make sure the shirt is in the right position: fits into the trim screw on the handle and the metal boot.

Finally, if everything works well, you should get rid of the excess part of the cable. We do it with pliers. It is very important that there is an extra 5-8 cm.

To prevent the end of the cable from unraveling, secure it with an aluminum cap, which must be squeezed with pliers. We put the free edge of the cable into the brake.

Replacing the gearshift cable on a bicycle

Bicycle cables are a very important part of the gear shifting on a bicycle. Also, the cables are used in the mechanical brake systems of the bicycle. Many nuances when driving a two-wheeled vehicle will depend on the quality of this part and its installation: gear shifting and braking. How to choose and install the right cable? What is its cost and are there any guarantees? Find out further.

What you need to know about cables and shirts?

These two parts determine the same function. the transfer of amplification from the brake lever or switch. The cable is located inside the jacket and is made of Teflon or wire. over, the wire must be twisted and steel. As for the shirts, they are made of flexible steel, which is rolled into a spiral. The cables and shirts are not able to function without each other, since the shirt is on top of the cable. Therefore, both details need to be given sufficient attention.

How To Replace Gear Cables. Mountain Bike Maintenance

Since the cable and shirt construction carries a certain weight load, on some models of bicycles there is a reduction in weight through the holders. They divide the shirt into several sections and are located on the fork and frame. Each holder is a small recess where the cable is inserted. Shirts are divided into 2 types:

  • Classic spiral. Due to the tightly woven wire, the shirt will hardly stretch or bend. To avoid excessive friction between the cable and the spiral jacket, the latter is wrapped in a thin layer of plastic. Sometimes, to reduce friction to almost zero, the cable is also wrapped in plastic. By the way, earlier it was necessary to lubricate both parts with oil for lack of plastic.
  • Uncompressed switch shirts. A relatively new invention that is an excellent alternative to spiral jackets. Here, the wire is not arranged in a spiral, but almost parallel to the length. They are connected using two layers of plastic. The advantages of this system are the constant length during bending, and the stable signal transmitted to the switch is transmitted as clearly as possible.

Buying cables and shirts

Qualitatively manufactured parts ensure a long and safe operation of the bike. What should be purchased cables and shirts?

  • Attention should be paid to the material of manufacture. The cables must be made of stainless steel.
  • The cable must be sanded.
  • The shirt should be coated. For example, Teflon. The main thing is that it is low-friction.
  • Don’t skimp on details. It is better to give preference to trusted and well-known manufacturers.

The average cost of cables and shirts is approximately the same for them. It starts at 80-100 rubles and goes up to 200 or more, depending on the country of origin. Don’t forget to get extra tips and powerful sharp cutters for the job.

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Features of replacing the derailleur cable on a bicycle

A bicycle lover should always be able not only to handle it, but also to carry out competent repairs. And most importantly, all actions can be done independently. This article will focus on the gearshift cable.

The cable is a very strong connecting thread between the speeds and the derailleur. The task of the cable is very simple, take human effort and transfer it to the gear shifting mechanism. The tension of the cable can be changed in both directions, respectively, this happens when the gear is already selected. The cable itself is a set of thin metal threads. Which are intertwined and so form a strong connection. The cable is durable and withstands well the stress placed on it. But due to poor quality care and bad weather conditions, breaks appear and the cable must be replaced.

When purchasing a cable, carefully inspect its condition; this stage requires special attention. The best material is steel, which is resistant to corrosion. Better to take in a Teflon coating, it is more durable and reliable. The price of the cable may vary, but depending on the manufacturer, they are relatively cheap. Considerably cheaper than other bicycle parts. Please note that you will need additional tools that you may not have. Most likely you have a pair of wire cutters or pliers, but most likely not a 5mm hex. Most of the actions on the bike will require just this. Therefore, the hexagon will become an indispensable thing when self-adjusting or repairing a bicycle.

Replacement in stages

As with any other repair work related to the replacement of parts, you will need some tools, namely hexagons and nippers. Nothing extra is needed except for the part to be replaced.

The process of replacing the cable is very similar to replacing the derailleur itself.

Attention! Due to different designs, the same method cannot be used.

The replacement steps themselves will consist of 12 steps:

  • The rear derailleur should be at the smallest chainring. Using pliers, you will need to bite off the end of the cable, and loosen the screw used for clamping. But before performing this action, you need to remember the initial position of the clamped cable. Only two options: above the propeller or under the propeller, this is very important for proper gear shifting.
  • Most likely you need a 5 mm hex, use it to loosen the shifting lever. and then remove it and set it aside. Access to the protected item is now fully open.
  • To remove the cover, you need to turn it counterclockwise, so the latch is unscrewed and sent to the shifter.
  • Thanks to the removed cover, the end of the cable under the spring becomes visible. Carefully study its location there so that you can easily pull it out and re-fasten it in the future.
  • Using the tension adjuster, pull out the entire cable.
  • Gently slide the spring to the side to gain access to the end of the cable and release it. Remember this shear movement, because it will also require the spring to move when installing the cable.
  • We replace all the free space with a new cable. It does not have to be identical to the one that stood earlier. For accurate installation, use an available tool, such as a screwdriver or possibly an awl, to guide the end of the cable. After the last actions, carefully review the position, he should stand up correctly and not bulge.
  • Now install the shifter cover. This time, the retainer must be turned clockwise until it is fully tightened to prevent breakage.
  • We install the shifter to the place previously occupied by it.
  • The cable is stretched until its beginning appears on the other side. Here it becomes clear whether the cable is suitable. If it does not crawl through the braid in any way, then most likely it will have to be replaced.
  • If the cable went further and you noticed its beginning, then once again we check the location of the switch. It should be exactly opposite the small star. We apply the cable, remember where it was attached, from above or below, and we can tighten the retaining screw.
  • As promised, this is the final step. To eliminate possible problems, we cut off the remnants of the cable using wire cutters, it will be enough to leave a couple of centimeters.

After carrying out all these actions, the cable can be considered replaced. In order to make sure that there are no problems on the next bike ride, you should check. The check should be done over the derailleur and shifter. Testing should be carried out at the stand. But of course, there is no such opportunity and you don’t want to apply for it somewhere. Therefore, carry out the most stringent check yourself. After all, your health is more expensive.

Checking at the stand, and even more so self-checking, can be very different from real movement on a bike. Consider this.

Replacing the cable in the derailleur of the bike

Since the replacement of the cable is a repair process, the manufacturer will need a certain tool kit:

  • a set of hex keys (and that there must be a 5 mm key in it);
  • and wire cutters.

over, the procedure for replacing the rear derailleur cable is almost the same as for changing the front derailleur. Only the latter will need to be set to light gear before loosening the cable clamp screw. Well, the designs of these two switches are somewhat different. you also need to pay attention to this. It is also worth remembering how the cables were laid before replacement.

Also, after the procedure for replacing the cable, be sure to adjust the rear (or front) derailleur.

Actually, the replacement is carried out step by step, step by step:

  • The rear derailleur is positioned directly opposite the smallest bicycle sprocket. The end of the cable must be cut and the clamping screw must be loosened. And first you need to remember in which part of the screw (top or bottom) the clamped end of the cable was located. Since this circumstance can have a significant impact on the correctness of gear shifting.
  • With a five-millimeter hexagon (key), you must loosen the fastening of the shifting lever, and then remove it. This will open access to the protection cover.
  • The lid lock must be turned counterclockwise to remove.
  • And when the cover is removed, the repairer can see the end of the cable under the large spring. And you need to take a good look at how it is installed there in order to understand how to get it out better.
  • It is necessary to pull the cable out completely, helping the process through the channel of the tension regulator.
  • To help the cable head to free itself, you need to gently push back the spring. And in the same way, it will need to be taken away when installing a new cable.
  • A new cable must be installed in the vacant space. And you need to stretch it through the tunic at the location of the old cable. For convenience, you can guide the cable with the end of a thin screwdriver or even an awl. And at the end, it is better to make sure that the cable still stands up exactly as it should.
  • Now you will need to return the shifting lever cover to its original position. And fix it with the previously removed retainer, turning it clockwise this time.
  • The shifter is installed in its place immediately before pulling the cable into the sheath.
  • The cable is pushed into the braid until the end of the cable appears in the area of ​​the rear derailleur. And there is one significant nuance here. If the cable “does not want” to crawl into the braid, it gets stuck all the time and clings to something, it (the cable) will probably have to be changed.
  • At the very end, you need to make sure that the rear derailleur is directly opposite the smallest of the bike stars. Attach the cable and fix it to the screw.
  • Cut off the excess cable with pliers, leaving only 3 centimeters, and squeeze its tip.

After the procedure for replacing the derailleur cable on your bike, you must thoroughly test the functionality of the shifter. And the switch too. This must be done before the bike is fully exploited. You need to test it on a special stand. And if this is not done, then the brakes can fail at the most inopportune moment.

READ  How to properly tension your bike chain

Just keep in mind that the bench test and real road conditions can be very different.

How to change the cable

The cable can be replaced at home. You don’t need to use sophisticated equipment for this. All tools are usually found in every home. The order of work also does not cause difficulties for a person with skillful hands.

Summary

Replacing the cable may be necessary at any time, because this element is constantly exposed to stress. On long journeys, you need to take a replacement supply with you. Pre-workout will not hurt. The work is not difficult. Many kids repair their bikes themselves. Anyone can do the replacement following the instructions.

How to choose the right cable

The bike cable must be carefully selected so that it serves you as long as possible and does not present any “surprises” while riding. So, what to look for if you choose a cable for a bike?

Thus, the basic rule for handling cables to adjust the speed is the correct selection of the part itself, as well as its competent installation.

Shifter Cables Routing & Installation | Build a Road Bike #08

How to change the cable correctly

There are several different cables on the bike that need to be changed in different ways.

    Change the gear shift cable. To do this, we need several tools: wire cutters, several hex keys, or one 5 mm hex adjustable wrench. In principle, the scheme of operation of changing the rear and front gearshift cables is quite similar in general terms. In the case of the front derailleur, before moving on to work, you should weaken the forward gear, transferring it to a “lighter” one. The rear derailleur is installed against a small sprocket. After that, the clamping screw is loosened, and the end of the cable is also cut off. So that in the future there are no problems with the installation of gear shifting, it is at this stage that you should carefully study the location of the clamped end of the cable. It can be either the top or the bottom of the screw.

Then you need to get access to the protective cover: using the key, loosen the shifter and remove it. Then remove the cover by turning it counterclockwise. The cable has now been accessed. Examine the diagram that opens in front of you. you need to completely pull the cable out. When this is done, a new cable can be installed. Sometimes, to simplify the task, an awl is used here to push the cable through. After completing the steps, check that the new cable is in the same position as the old one.

Then we put the shifting lever back in place, fix it, and attach the shifting lever to its main position.

At the very end of the procedure, the installed new cable is pushed into the sheath. If this does not work and the cable is pushed with great effort, most likely the sheath will also have to be replaced. The reason may lie in its deterioration. this is the most common option. The cable pulled out from the back is set in the correct position and secured with the fixing screw.

The excess part of the cable is cut using nippers, but leaving about 3 cm. The end is squeezed. Before setting off, you need to test the bike’s performance and test it on different road surfaces. If you have any trouble, you need to try to repeat the operation again or change the cable again.
We change the brake cable. This operation is only required if the movement of the cable is difficult or if the shirt is worn out. Carefully monitor the condition of each of these parts and replace as necessary. Otherwise, it may be difficult to put the brake levers back in place. Friction of the cable may also occur. If you find it difficult to work with one of these elements, you should change both of them. First of all, you should unscrew the screw with which the cable connects to the brake lever. Watch out for the safety of metal anthers, as they can often be lost during work. Then we unscrew another screw, which is located on the brake lever. You can do this with your fingers. Now it is enough to straighten the shirt so that the cable can be easily removed.

Then we proceed to the procedure for replacing the shirt. To do this, we fit a new shirt in length, cutting it off with pliers. Be sure to keep the edges straight so that the cable fits easily. Then we install the metal tips. Now we pass the cable through the shirt. A distinctive feature of a well-chosen part will be the free passage of the cable over the shirt.

install, gearshift, cable, bicycle

The structure is ready and now is the time to put it in place. We attach the cable to the brake lever, fasten the adjusting screw. Then the anthers come into play: they need to be put on the unattached end of the cable with the side where the narrowing occurs. This detail is also a must in the design: it prevents dirt from entering the shirt.

Then you need to tighten the cable. To do this, move the levers, then tighten the cable and fix it with the corresponding screw. Before using the two-wheeled vehicle, we check the quality of the work performed and stretch the new cable. To this end, the brakes are pressed firmly several times. Make sure the shirt is in the right position: fits into the trim screw on the handle and the metal boot.

Finally, if everything works well, you should get rid of the excess part of the cable. We do it with pliers. It is very important that there is an extra 5-8 cm.

To prevent the end of the cable from unraveling, secure it with an aluminum cap, which must be squeezed with pliers. We put the free edge of the cable into the brake.

install, gearshift, cable, bicycle

When you may need to replace the gearshift cable

As soon as the rear derailleur malfunctions begin, the first step is to check the condition of the cable for high-speed shifting. It is he who most often becomes the reason:

  • sticking switching;
  • or incorrect switching.

Why does the cable fail? Its main “enemies” are water and mud. Ride in the rain and slush? Didn’t rinse or dry the bike? Get ready for gear shifting problems. The cable will start to malfunction. At first, after purchasing a vehicle, this part is still protected by the factory lubricant, then you can hold out on aerosol lubricants for some time. But then the cable will still have to be changed.

But the replacement process, as already mentioned, is simple and takes only a few minutes. The main thing is to do everything correctly and consistently, guided by step-by-step instructions.

Changing the gearshift cable on a bicycle

The cable for shifting and adjusting the bicycle speeds is a link between the brake lever located on the handlebar and the mechanism that directly switches the speed. The quality of such cables affects not only the speed of movement, but also the length of the braking distance in the event of a stop. And the brakes on the bike should always be in order.

That is why a bicycle cable must have a margin of safety and, at the same time, a flexible structure. Based on such requirements, the gearshift cable is made of an interweaving of steel threads. they are not susceptible to rust formation, and also additionally have a protective layer. This is necessary in order to protect it from the negative influences of the external environment. After all, a bicycle is a vehicle that is used not only on flat bike paths, but also in real off-road conditions.

Above, the shift cable is still reliably protected by a special casing. The latter is something like a hollow tube in which there are intertwined steel threads. Considering that metal tends to bend and deform, such a casing not only protects against corrosion, but also maintains the smooth shape of the part. Thus, the shift cable is always in the required position for operation.

Previously, the casings were made of metal as a base, with a plastic coating. As a result, it turned out that such a casing wears out quickly. To replace it, a casing with an inner plastic coating was designed. It prevents the gearshift cable from rubbing against the inner walls.

Replacing the gearshift cable on a bicycle

Bicycle cables are a very important part of the gear shifting on a bicycle. Also, the cables are used in the mechanical brake systems of the bicycle. Many nuances when driving a two-wheeled vehicle will depend on the quality of this part and its installation: gear shifting and braking. How to choose and install the right cable? What is its cost and are there any guarantees? Find out further.

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These two parts determine the same function. the transfer of amplification from the brake lever or switch. The cable is located inside the jacket and is made of Teflon or wire. over, the wire must be twisted and steel. As for the shirts, they are made of flexible steel, which is rolled into a spiral. The cables and shirts are not able to function without each other, since the shirt is on top of the cable. Therefore, both details need to be given sufficient attention.

Since the cable and shirt construction carries a certain weight load, on some models of bicycles there is a reduction in weight through the holders. They divide the shirt into several sections and are located on the fork and frame. Each holder is a small recess where the cable is inserted. Shirts are divided into 2 types:

  • Classic spiral. Due to the tightly woven wire, the shirt will hardly stretch or bend. To avoid excessive friction between the cable and the spiral jacket, the latter is wrapped in a thin layer of plastic. Sometimes, to reduce friction to almost zero, the cable is also wrapped in plastic. By the way, earlier it was necessary to lubricate both parts with oil for lack of plastic.
  • Uncompressed switch shirts. A relatively new invention that is an excellent alternative to spiral jackets. Here, the wire is not arranged in a spiral, but almost parallel to the length. They are connected using two layers of plastic. The advantages of this system are the constant length during bending, and the stable signal transmitted to the switch is transmitted as clearly as possible.

The disadvantage of this shirt is that it is completely unsuitable for braking systems. They are less strong, so they can easily break or bend under the influence of additional load from the brakes.

Purpose of cables and braids

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

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

install, gearshift, cable, bicycle

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

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

How To Replace & Fit Gear Cables On A Road Bike Like A Pro | Maintenance Monday

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

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

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

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

Replacing the gearshift cable on a bicycle

In the life of every cyclist, a situation may arise when it becomes necessary to replace the gearshift cable on the vehicle. And it turns out that you can do it yourself, quickly and easily, without the involvement of specialists.

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, and others). However, if you are planning to ride on hills and slides, pay attention to mechanisms with a large range of speeds.

Internal switching mechanism

City bikes often use an internal gearshift mechanism that is hidden inside the rear planetary hub (for example, the new Forward Surf 2.0 cruiser). Planetary hub bikes have only one chainring and one sprocket. The number of speeds / gears of the planetary bushings is usually from 3 to 7. The planetary hub has a rather complex internal structure.

Pluses of planetary bushings: they withstand adverse weather and road conditions well, since the mechanism and all its parts are enclosed in a case and, as a result, are reliable and durable; you can switch speeds without pedaling.

Cons of planetary bushings:. heavy weight;. very difficult repairs, impossible in field conditions.

What is gear shifting

The essence of switching speeds is to drag the chain from one star to another. Various combinations of front and rear sprockets allow you to regulate the cyclist’s load. But first, let’s turn to the bike drivetrain.

The transmission is all the parts and assemblies of the bicycle that provide the transfer of energy to the rotational movement of the rear wheel. The transmission consists of a carriage, a system of connecting rods, a chain, sprockets or cassette (or ratchet), front and rear derailleurs, as well as shifters (they are also sometimes called shifters).

Gear shifting occurs through the shifters located on the steering wheel. Using the rear derailleur shifter, located on the right handlebar, the chain is thrown between the rear sprockets, and using the front derailleur shifter (it is on the left on the steering wheel) between the front sprockets.

Most multi-speed bikes have three drive sprockets and six to eight driven sprockets. The fore stars are counted from small to large, and the rear stars, on the contrary, from large to small.

The most common reasons that interfere with changing speeds on a bike

Unforeseen situations can happen in all cycling conditions. Therefore, you need to prepare ahead of time. Even at home, transport is studied, the most necessary tools are collected that will be needed on the road in case of a breakdown. Knowledge is power. If you feel that you can forget the material you have covered, but you want to ride, make a small printout so that you can quickly remember what’s what on the spot. Download video to your phone! Nuts must always be tightened securely, but not overtightened.

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.