Remove the Sprocket Block from the Rear Bicycle Wheel

How to disassemble and remove a ratchet on a bicycle

  • Tool for work
  • The difference between a ratchet and a cassette
  • Ratchet puller
  • Removing the Ratchet from the Bicycle
  • Unscrewing a stuck ratchet
  • Quick tips for repairing a ratchet

The bicycle ratchet, popularly also known as the nut, is a ratchet mechanism that allows you to reliably transmit torque through the chain from the pedals and at the same time coast freely without the need to pedal non-stop. This mechanism is assembled as a single piece with the rear wheel hub. Consists, in fact, of the ratchet itself in the form of a toothed drum with two pawls and a non-separable cassette of sprockets.

Simple maintenance of the bike transmission boils down to cleaning it from dirt and grass that gets clogged between the sprockets.

You will need to remove the ratchet from the bike in the following cases:

  • To adjust the tightening of the rear wheel hub bearings. You can not remove anything, but with the cassette of sprockets unscrewed, it is much easier to remove the ball bearings, determine the degree of wear of the cup, lubricate the assembly.
  • If possible, to replace broken dogs. Although such small parts are not sold individually, and most often you will need to buy the entire assembly, they can be removed from the old ratchet. Unfortunately, there are times when, as a result of the premature death of the dogs, the drum with asterisks either gets jammed, or it starts to rotate freely in both directions.
  • When the teeth of the smallest stars are worn out to the extreme or if one of them breaks.
  • To install the spoke into the hub of the rear wheel on the right side, to replace the broken.

Tool for work

  • Ratchet puller.
  • A larger adjustable wrench or a wrench, usually 27 mm, but note that there are pullers with 24 mm edges. It will be more convenient to use a box or socket wrench, since it will be possible to press on it with the maximum possible force, without fear that it will jump off the edges of the puller.
  • Open-end wrench 14 or 15 mm for unwinding the sleeve.
  • Thick lint-free rag.
  • Thin center punch, if you need to disassemble the “nut”.
  • The hammer never hurts.
  • Non lithium grease. Thick oil generously packed inside the assembly can cause the dogs to stick. After that, the pedals often begin to scroll not only backward, but also forward.

The difference between a ratchet and a cassette

Do not confuse the bike ratchet with the cassette, as they are not interchangeable. Currently, the former can only be found on old and very cheap bicycles. On modern bicycles, a more advanced part is used, such as a cassette.

The main drawback of the ratchet is its incompatibility with the 15 mm diameter hollow shaft of the new QR15 standard. Loose loading from off-center sprockets can cause local bending on the hollow axis.

On the inside of the ratchet there are ratchet pawls, on top of it an external bushing with sprockets is installed. The role of the nut holding these two parts is played by the cone, which is the working surface for the ball bearing. Inside there are two bulk bearings, each of which is assembled from balls of the same size.

The hidden part of the ratchet. the inner sleeve. is screwed onto the threaded part of the rear wheel, and to remove it, you need a special puller.

Ratchet puller

When pedaling, a fairly large moment is transferred through the chain to the wheel axle, in particular, when driving downhill. With exactly the same force, the inside of the ratchet is threaded to the rear wheel hub.

Always, to unscrew a long-established “nut” requires a decent amount of effort, which can only be transferred using prepared tools. These tools include a slotted bushing-like puller and a large wrench.

The ratchet puller cannot be replaced with a similar but cassette-specific attachment. They should not be confused as they have absolutely incompatible splines.

Removing the Ratchet from the Bicycle

  • First you need to remove the rear wheel.
  • Remove axle from wheel hub. Some nuts screwed onto the axle prevent the puller from being firmly inserted. But, if the removable device easily climbs onto the assembled axle, then it would be good to secure it with a nut. Retaining nut prevents puller from disengaging when maximum force is applied.
  • Support the upright wheel against the wall. The tire does not need to be touched at all, since without it it is very easy to scratch the rim during operation. And the wheel with the rubber on is much easier to hold.
  • Insert the puller into the ratchet and with the largest key, jerkily try to twist it. You need to twist counterclockwise, since the thread that attaches the ratchet to the wheel hub is ordinary, right-hand. It is better to place the key lever horizontally so that you can press from top to bottom.
  • In order to divide the “nut” into two parts, when it needs to be repaired, you will need to take a hammer and center punch. Also, to replace a carpentry center punch, you can use a large nail or a larger self-tapping screw. The ratchet mechanism is disassembled by unscrewing the flare nut clockwise, since its thread is reverse, left.

How to disassemble the ratchet is clearly demonstrated in the following video:

Unscrewing a stuck ratchet

It so happens that there is not enough effort to disrupt a rattle that has been tightly tightened for several years. In this case, lengthening the key lever will help.

Many in the garage will find an iron pipe or bar about 60 cm long.Then you can simply put this pipe on the handle of an adjustable wrench or the tooth of an open-end tool, or do something tricky and assemble a two-arm lever.

  • Take a couple of short, 6-8 cm long bolts M8 or M10 and pick up two corresponding nuts for them.
  • Insert one of the bolts into the hole in the ratchet puller, and thread the other through the hole in the handle of the adjustable wrench. These bolts should be secured with nuts to hold them in place.
  • We insert the pipe between two bolts: the puller installed in its place and the adjustable wrench put on it. Now all that remains is to push the resulting lever down to disrupt the ratchet.

Usually, with a lever from 50 to 60 cm, any rattle is unscrewed in almost one motion.

How to remove rear sprockets from a bike

The bike drivetrain requires periodic maintenance. The most common problems are chain wear and failure of one or more sprockets on the cassette. Wear is also true for a single-speed one, the only difference is that the chain and the star itself are designed for longer operation.

A worn out part of the transmission negatively affects its entire operation, so the used sprocket will need to be replaced. This problem especially pops up on asterisks that are used too often, which, in principle, is logical. Before changing, it is necessary to remove the worn out sprocket from the rear wheel, which we will talk about further.

Dismantling the transmission cassette

The rear of the transmission is not too difficult to disassemble, all that is needed is time and a few tools: a cassette puller, a whip and wrenches (open-end. for removing a wheel and an adjustable. for a cassette).

The first thing to do is to free the bike from the rear wheel. Using a wrench, the nuts are unscrewed, and the chain is dropped from the rear sprockets. On a mountain bike, it is usually a matter of a second to remove and put on the wheel, thanks to the eccentric mount.

The removable device is installed on the slotted nut of the cassette. A whip. a small flat “knife” with a fragment of a chain. is needed to keep the cassette from turning. With the help of an adjustable wrench, we rotate the puller, we direct the whip in the opposite direction, or, more simply, we hold it with a large star of the system.

To unscrew the nut, you will need to sweat a little, and not only in the first stage. With the same good effort, the stars will need to be returned to their place. Once the nut has folded, the cassette can be safely detached from the wheel. Now it remains to examine it and determine which star needs to be pulled.

Some of the outer small sprockets can be removed immediately when removing the cassette. They should be cleaned and inspected for wear. The same is done with the main sprockets: it is determined how much they are worn out and which ones are the most.

Removing and installing a star on cassettes

Unlike ratchets, in this system the stars can be changed individually. All that is needed is to remove the old part and put a new one in its place. Special rivets and small spacers are located between the stars, which allow them to hold a fixed position and facilitate the installation of the cassette itself. It is very easy to screw the desired star from the device, the main thing is not to get confused in the sequence, especially on large cassettes of high-speed mountain bikes.

Sometimes on cassettes “spiders” can be found. rigidly fixed areas of several stars. Here you will have to replace the entire set, on which one of the stars is badly worn out. True, this only applies to large transmission rear wheel sprockets.

When replacing a single chainring, you may encounter the problem of the difficulty of switching the chain to it. This is due to the fact that the chain already has wear compared to the new sprocket. And if this is not so noticeable with one detail, then several new stars will immediately bring a noticeable dissonance to the operation of the transmission. That is why it is advisable to change the cassette simultaneously with the chain.

A little about singlespeed

To remove the rear transmission sprocket from a single speed bike, you only need to open the retaining ring. Among singspeed lovers, you can hear that the regular ring is useless and can break itself, even if you did not think about changing the star. Perhaps this is so. In any case, if the stopper is damaged, we change it to a new one, otherwise backlash cannot be avoided (the chain simply dangles from side to side).

It is also very simple to assemble such a structure: the ring is literally put on its own, you don’t even need to squeeze it. It’s that simple on single-speed bikes! You shouldn’t just wedge yourself into the transmission of a bicycle with one gear. Common reasons are a badly worn part or the need to install a new sprocket with a larger diameter.

As you know, without serviceable stars and chains, the great will not even be able to get under way. Timely replacement of transmission system components is the most important component of repairing any type of bike. from simple road two-wheeled “bugs” to road and mountain superbikes.

How to remove rear sprockets from a mountain bike. Rear bicycle cassette: description, features of repair and replacement

In order to independently repair and maintain a bicycle, it is advisable to be well versed in the structure of its main running elements. One of the defining units in the system is the bicycle cassette. Let’s figure out what this mechanism is, and also find out how to dismantle and install it.

What is a rear bicycle cassette?

The mechanism is made in the form of a set of rear sprockets connected to the free wheel of the rear hub. The elements of the functional unit are fixed with a lock nut. The latter contains teeth that prevent the mount from loosening during driving.

The rear cassette of a bicycle serves as a system for converting the transmission range of a two-wheeled vehicle. The use of stars of various diameters with a separate number of teeth makes it easier to move in difficult conditions and contributes to the development of increased speed when driving on smooth roads.

The bicycle cassette can be made of the following materials:

  • Aluminum is distinguished by its low weight and the lowest density of all metals. A bicycle cassette made from alloys of this material is a rather expensive option. Mechanisms of this kind are in particular demand among experienced cyclists, for whom the reduction in the total weight of a two-wheeled vehicle is of decisive importance.
  • Steel is the most common material used in bicycle parts. The main advantage of the material is its increased strength, resistance to mechanical stress. The obvious disadvantage of steel is the increased weight. In fact, a steel bicycle cassette looks like the best option for the average cyclist, as it has an optimal price / durability ratio. To protect such systems from the harmful effects of corrosion, manufacturers resort to chrome plating, bluing and nickel plating of structural elements.
  • Titanium. Bicycle cassettes made from the presented material are lighter than steel, but heavier than aluminum. The specified production base is characterized by increased strength. Therefore, titanium cassettes are most often the choice of consumers who operate two-wheeled vehicles under significant loads. The material, like its alloys, does not corrode. If the bike owner is not aiming at the maximum possible weight reduction of the bike, it is worth opting for a titanium cassette, which will last much longer compared to the above options. The only drawback of this solution is the high cost.

Number of stars

The cassette of the bike can be selected based on the number of stars. Mechanisms that contain 7 stars can be found on old bicycles. The most common cassettes are 8-10 stars. Such systems are installed on the most numerous modern bikes, from mountain to road. The 11 stars can be seen on Campagnolo cassettes. Their installation becomes available only when using a sleeve of the same brand.

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You can determine the nature of the existing cassette by looking at the special markings. So, the designation “11-36T, 10 speed” indicates that the largest star contains 36 teeth, and the smallest. 11. There are 10 stars in total.

There are several types of bicycle cassettes:

  • Dismountable. the most common group of mechanisms, where all the stars, in addition to the two smallest, are connected into a single whole with screws or rivets. This method of fixing structural elements facilitates assembly and maintenance. At the same time, the implementation of such a solution is accompanied by an increase in the weight of the system and the tendency of its components to clog.
  • On a spider. cassettes of this plan are made in the form of stars assembled on an aluminum frame, which, in fact, is called a spider. The latter is joined by the smallest two stars. Spider cassettes are easy to clean and lightweight.
  • Several spiders are expensive products that are installed on professional models of bicycles. They consist of two spiders, each of which is joined by sets of 2-3 stars. The main advantage of this solution is the ability to quickly replace a worn out element. In this case, the second part of the system remains in a functional state. The presented mechanisms are lighter than demountable structures. In addition, they are easier to clean from small debris and dirt.
  • Open Glide. are monolithic cassettes that are designed for installation on road bikes. Such cassettes are fixed on the slots of the ratchet drum with a lightweight aluminum nut and a special cover on the other side.
  • The X-Dome is another monolithic system. It is fixed at the small sprocket with a locknut, and at the very base of the mechanism, a large sprocket serves as a mount. Most often, the structural elements of the nodes of this plan are made of lightweight aluminum.

Replacing the bike cassette

To replace the mechanism, you need to understand the features of its dismantling. Removing a bike cassette is a fairly straightforward task. However, its implementation requires the use of a specialized tool in the form of a puller and a whole set of keys. A bike cassette puller is needed to loosen the retaining nut. In turn, the keys are used to fix the elements of the mechanism in a fixed position.

How do I remove the cassette from my bike? The work is done as follows:

  • A whip is put on the largest star, with which the system is held in a static position. Use a wrench to turn the bicycle cassette puller. The small star and spline nut have a grooved surface. Therefore, when unscrewing the fasteners, sharp crunching sounds may be heard, which should not be scared during work.
  • The nut is unscrewed, after which the cassette is removed. In this case, it is worth paying attention to dismantling small sprockets, which can be put on the bushing independently of the rest of the system elements. Between them there are spacers in the form of washers, which must be carefully removed so that they do not crumble.
  • The individual parts are laid out in an organized manner, which allows the mechanism to be re-assembled without confusion.
  • Having figured out how to remove the cassette from the bike, in the end it remains only to assess the degree of wear of the sprockets and the state of the system as a whole.

Cassette lubrication

After disassembling a bicycle cassette, its elements must be carefully treated with a lubricant. Today, there is a special lubricant for the cassette in tubes on sale. However, for these purposes, you can use any other non-lithium substance that has dust-repellent properties.

Insert cassette

Replacing a cassette on a bicycle involves removing it from the wide splines of the hub and installing a new set of sprockets, focusing on the grooves on them. In fact, the installation of the structure is the reverse operation of its dismantling. Here you need to ensure that the sprockets fit tightly on the ratchet splines. Work must be done slowly to avoid damage to the spline flanges.

Using the bicycle cassette wrenches, you need to put the stars and rings on the ratchet, then screw the compression nut according to the thread. Here the order of the set of stars on the splines should be observed. Spacer rings contain special pins that must fit into the corresponding openings in the stars. If this requirement is ignored, the stars will be located too far in relation to each other, which will affect the accuracy of the gearshift system.

The end nut must be tightened as tightly as possible, using the same wrench to remove the cassette on the bike. It is completely undesirable for the fixing element to unwind gradually during driving. Therefore, securing the system with a locknut, it is worth moving the wheel to a vertical position by thoroughly pressing the key lever.

As you can see, disassembling and reinstalling the bike cassette is not so difficult. The final check of the system operability requires attention here. Before leaving, be sure to check that the stars are not out of balance in relation to each other. It is also worth making sure that the same distance between the stars is observed.

Replacing the cassette on a bike and maintaining it is a job that does not require any special skills from the bike owner. The only defining issue is the availability of specialized tools. As for the choice of a new cassette for replacement, it is worth adhering to the desired gear ratio.

How to remove a sprocket from a bicycle wheel with your own hands

The bike drivetrain needs constant maintenance. The chain and sprockets on the wheel are most susceptible to wear. The single-speed bike is not insured against such breakdowns. The only difference from multi-speed models is that the chain and stars are designed for a longer service life. Consider how to remove a sprocket from a wheel for subsequent replacement.

First, why is it needed and can you do without it? No. A partially worn drivetrain will impair the performance of the entire bike. Therefore, the star must be replaced if broken. This is especially true for asterisks, which are used especially often. Naturally, before doing repairs, the worn part must first be removed.

Bicycle sprocket options

  • The simplest option. The stars are separated from each other by plastic spacers. The distance between the stars is strictly specified. Individual parts are fastened with rivet studs. If necessary, it is not at all difficult to disassemble such a structure and remove the stars for replacement;
  • Spider cassette;
  • X-Dome. An expensive option. Solid milled sprocket block that is mounted on an aluminum sprocket. The latter carries slots for the drum. The result is a reliable, lightweight and durable construction for a speed bike.

Cassettes are consumable items and must be replaced periodically. On average, from 5 to 15 thousand km of driving.

The gear range setting is highly dependent on the driving style. Let’s consider the most typical cases

Downhill transmission

The likelihood that the downhiller will have to overcome a steep climb is small. Because of this, many DH bikes only have one forward gear. Rear cassette gear limited.

Cross-country drivetrain

This driving style involves driving long enough distances, and the road conditions are, to put it mildly, different. The number of front sprockets is 2-3. The number of reverse gears ranges from 8 to 9. This allows you to maintain strength when overcoming hills and carry out fast descent.

Mountain Bike Drivetrain (All Mountain)

The All Mountain drivetrain features a single chainring sprocket, combined with an 11 chainring at the rear. This makes the bike easy to operate, fast and functional at the same time.

It is possible to determine the optimal settings by trial and error, taking into account your own riding style, the size of the bicycle wheels and a number of other factors.

Disassembly procedure for transmission cassette

Removing the rear of the transmission is easy. Sprocket Removal Tool Kit Next.

  • Open-end wrench for wheel removal;
  • Adjustable cassette wrench;
  • Whip;
  • Cassette remover.

The first step is dismantling the rear wheel of the bike. Using a wrench, unscrew the nuts, then remove the chain from the rear sprockets. For some modifications (for example, for MTB), removing the wheel is literally a matter of a minute, since it is fixed on the eccentric.

Install the puller onto the spline nut. The “whip” is used to keep the cassette from spinning. Rotate the puller with an adjustable wrench. The direction of rotation of the whip is in the opposite direction.

Removing the nut is not easy. You will also have to work hard to install it in place. After the nut has been unscrewed, the cassette is detached from the wheel without effort. It remains only to assess the condition of the cassette and determine which sprocket is out of order.

The outer sprockets can be removed immediately after the bicycle cassette has been removed. They are cleaned and carefully examined to assess the degree of wear. Worn out. replace.

How to remove sprockets from a bicycle wheel. sequence of actions

A bicycle cassette with sprockets differs from a ratchet in that individual sprockets can be replaced individually. All that needs to be done is to remove the worn part and replace it with a new one. The space between the individual sprockets on the wheel is filled with spacers and rivets, which make dismantling and mounting easier. It is only important not to confuse the sequence. This is especially true for multi-speed mountain models.

It happens that cassettes are equipped with “spiders”. This is a design where several sprockets are rigidly fixed. In this case, if any of the parts is badly worn out, you will have to replace the entire “spider”.

Replacing single sprockets can cause chain switching difficulties is great. This is because the chain is sufficiently worn out in relation to new sprockets. For this reason, it is advisable to replace the chain and cassette at the same time.

To remove the gear sprocket on a single speed bike, simply open the circlip. Many singlespeed fans argue that the “native” retaining ring is useless and sometimes breaks, even if there is no question of replacing the star. In any situation, if the stopper is out of order, you need to replace it. Otherwise, backlash is inevitable. The chain will simply dangle in different directions.

If the sprockets are defective, the bike will not ride. Timely replacement of transmission parts is important for all bike models: from the simplest “hard workers” to the most sophisticated high-speed highway and mountain bike bikes.

Caring for bike sprockets

The rubbing mechanisms of the bicycle must be periodically lubricated and cleaned of dirt. This extends the transmission life and makes driving safer. After several trips on bad roads, forests or, moreover, off-road, the bike is literally overgrown with mud. If the frame and wheels can be washed clean, then the contamination of the bike mechanism is simply not visible. Therefore, after such trips, it is useful to inspect the large and take measures to clean the parts, and, if necessary, replace the worn out components.

You can clean the bike cassette according to this algorithm.

  • Release the rim brake. Alternatively, remove the caliper on the disc brake;
  • Remove the rear wheel;
  • Examine the cassette carefully. If it is heavily soiled, you will have to remove it from the wheel and clean it. With a little dirt, you can clean the bicycle cassette from dirt without removing it from the wheel;
  • Use special narrow brushes for cleaning, which make it possible to penetrate between the gears and clean out what should not be there. In addition, it is much more convenient than penetrating the gaps with a rag;
  • An old toothbrush is great for cleaning the teeth of the stars;
  • Wipe the surfaces with a napkin dampened with kerosene. Then apply lubricant to the teeth and pits;
  • It is advisable to clean the sprocket cassette and chain at the same time. Only in this way can you achieve the desired result.

The system is cleaned in the same way. You don’t need to remove the bicycle wheel, but you need to work with the utmost accuracy so as not to accidentally knock off the switch setting.

Sprockets are important transmission parts. For the bike to function normally, you need: the correct choice of gears, careful and timely maintenance, replacement of worn parts. All this allows us to make trips safer, to avoid unpleasant surprises on the road. As for the high-speed bike, it will really show itself to be high-speed, and will not sadly trudge in a single gear.

Replacing the rear sprocket on a bicycle: complete instructions

The sprocket on the bike plays a major role in the quality and speed of the ride, provides gear shifting. The most common problem is rapid wear and tear. How to change the asterisk correctly, we will consider in this article.

With frequent and intensive use of the bike, mechanical damage to parts may occur. The most common problem is sprocket wear on the rear wheel. This directly affects the operation of bicycle transport and is fraught with such consequences as self-switching of speeds, spinning the chain and its dropping. In order to exclude such a nuisance, it is enough to follow and change the star from time to time. But this does not mean at all that for this you need to go to the workshop and throw out large sums of money for diagnostics and replacement of the necessary parts. It is quite possible to cope with such a task yourself. How to remove the star from the wheel yourself and replace it will be discussed in this article.

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Removing the sprocket from the rear wheel of a bicycle

Disassembling a wheel to replace parts is not difficult at all. You will need some free time and tools like a pair of wrenches, a cassette remover and a whip. In most cases, all stars are collected in the same way on mountain bikes, since they have a standard structure.

  • First you need to turn the bike upside down to a stable position.
  • Now you need to remove the wheel. To do this, use the key. Throw the chain to the side. On modern models of the sports unit, the wheel is removed even easier (thanks to the eccentric).
  • Now you can start parsing. Use a whip to keep the cassette from spinning, and install a puller on the cassette nut. Next, we work with the key, here you have to work hard to disassemble the cassette. If during unwinding you hear a characteristic crackle, do not be alarmed! This happens if the sprocket size is small. After the nut has been unscrewed, you will need to unscrew it by hand with a little effort. Now remove the cassette and inspect everything for wear.
  • Do not forget to fold the parts in the correct sequence during disassembly, otherwise you may have problems during assembly.
  • The last thing to do is to remove the protective plastic ring.
  • After the parts are removed, it is necessary to inspect and lubricate the parts that need lubrication.

How to replace a sprocket on a bike

Unlike older models, modern sprockets can be changed individually. You can simply replace the old sprocket from the rear wheel with a new one. Between them are the so-called gaskets, which serve to fix the position and make the installation process much easier.

Unrolling the parts is very simple, mostly counterclockwise. It is important not to get confused in the correct sequence. There is such a thing as “spiders”. This means that areas of a pair of stars are very tightly fixed. In such a situation, you will have to change the entire set to a new one.

If you change only a single star, you may encounter such a problem as the difficulty of switching the chain to it. This often happens, since the chain is also worn out to some extent, therefore it is advised to change them at the same time as the stars.

Replacing the cassette on a bicycle

Assembling the cassette is done in the same way as disassembling, only in the reverse order, so it is so important to remember it, especially if you are doing it yourself for the first time.

  • Put the chain on the star.
  • Reinsert the rear wheel and tighten it firmly until it stops.
  • Check secure fit.
  • Turn the bike over. And you’re done!

The final word on Singlespeed

Single speed bicycles have a retaining ring. Thanks to this, the star can be replaced in a few minutes. It is enough just to open this ring. Singlespeed enthusiasts claim that standard rings are flimsy and can break even if you don’t use them for replacement. There is a deal of truth in it. Therefore, it is worth constantly checking its condition and replacing it with a new one from time to time. Otherwise, the chain will simply dangle from side to side.

The assembly of this structure does not require any special skills. The ring is inserted without any effort, this is probably the main advantage of these models.

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How to remove the cassette from the rear wheel of a bicycle: necessary tools, video

The transmission of a bicycle needs regular inspection and maintenance, the chain or sprockets wear out the fastest. A poor system condition will shorten the life of the vehicle and make driving dangerous. Therefore, the question arises how to remove the cassette from the rear wheel of a bicycle in order to replace it?

To do this, you do not need to know the complete structure of the rear wheel, but it is worth reading the information about it in order to understand the process of operation of this unit itself. Only after you have prepared theoretically, proceed directly to the dismantling process.

  • 1 Required tools
  • 2 Sequence of actions
  • 3 Videos

To remove the old part, just like when dismantling the ratchet, only 3 tools are required:

  • puller for a two-wheeled vehicle retaining ring. needed to unscrew the nut;
  • The key whip is a tool with a bicycle chain. It is necessary to fix the position of the cassette, because dismantling occurs with a freely rotating wheel;
  • adjustable or box wrench.

After you have prepared the necessary tool, proceed with the dismantling process. Detailed instructions on how to remove the cassette from the rear wheel of a bicycle are presented below.

  • Remove the rear wheel of the vehicle. To do this, unscrew the nut holding the rear tire axle and pull out the brake mount. Then shoot the camera itself.
  • Examine the cassette carefully for signs of damage or wear, decide that replacement is really necessary. Along with this, assess the condition of the bearings by shaking the axle in different directions. If there is a lateral clearance on the axle, they will soon need to be replaced. It is better to entrust this procedure to specialists, self-repair can be carried out only after a detailed study of the instructions.
  • To remove a damaged cassette, place the wheel on a flat surface with the part up. Use a whip and a special puller: rotate the whip fixed to the largest sprocket, pointing the tool to the right. And the puller must be inserted into an available pass near the axis.

Important! Removing the cassette from the bike without a puller will be problematic. you will spend a lot of time and effort.

The thread on the ring with a dozen teeth is standard and unscrews counterclockwise. You will need a lot of strength to move the circle from its place, do not be intimidated by the grinding that occurs due to the locking teeth.
After elimination of the stop ring, the cassette moves to the side and protrudes. It is highly likely that it will split into parts: individual stars, gaskets and other solid elements.

Advice! Remember the sequence of asterisks and other elements, so that after removing them, return everything to its place.

  • Now replace the cassette, remember, the new bike rear wheel cassette should be with the same gear ratio. All elements of the system are designed for certain indicators and any replacement of a part violates the overall balance of the device. Usually, the gear ratio is indicated on the cassette sprocket, you can also calculate it yourself by counting the number of teeth on the largest and smallest “gear”. these numbers are the desired indicator. Do not forget about the special spacers to be placed between the main parts.
  • After fixing the sprockets in their original place, screw the ring and cassette. Do not use all your strength, the threads on the parts are fine and rough operations can ruin it. The cassette is connected by a locking circle with special teeth that do not allow it to unscrew.
  • After returning the ring to its proper position, tighten the nut securely and return the wheel to the rear fork of the bike. This step is similar to the first paragraph in the instructions, only the opposite is true.
  • It is known that the bike will not budge with faulty sprockets, periodically check their condition and change them in time. Often, along with the cassette, the chain also wears out. Therefore, assess its condition and, if necessary, tighten or shorten, and also lubricate without fail, since you could inadvertently erase all the substance from the metal surface.

    This video provides instructions on how to remove the cassette on a bicycle.

    How to remove a sprocket from a bicycle wheel with your own hands

    The bike drivetrain needs constant maintenance. The chain and sprockets on the wheel are most susceptible to wear. The single-speed bike is not insured against such breakdowns. The only difference from multi-speed models is that the chain and stars are designed for a longer service life. Consider how to remove a sprocket from a wheel for subsequent replacement.

    First, why is it needed and can you do without it? No. A partially worn drivetrain will impair the performance of the entire bike. Therefore, the star must be replaced if broken. This is especially true for asterisks, which are used especially often. Naturally, before doing repairs, the worn part must first be removed.

    Bicycle sprocket options

    • The simplest option. The stars are separated from each other by plastic spacers. The distance between the stars is strictly specified. Individual parts are fastened with rivet studs. If necessary, it is not at all difficult to disassemble such a structure and remove the stars for replacement;
    • Spider cassette;
    • X-Dome. An expensive option. Solid milled sprocket block that is mounted on an aluminum sprocket. The latter carries slots for the drum. The result is a reliable, lightweight and durable construction for a speed bike.

    Cassettes are consumable items and must be replaced periodically. On average, from 5 to 15 thousand km of driving.

    Types of bike transmissions

    The gear range setting is highly dependent on the driving style. Let’s consider the most typical cases

    Downhill transmission

    The likelihood that the downhiller will have to overcome a steep climb is small. Because of this, many DH bikes only have one forward gear. Rear cassette gear limited.

    Cross-country drivetrain

    This driving style involves driving long enough distances, and the road conditions are, to put it mildly, different. The number of front sprockets is 2-3. The number of reverse gears ranges from 8 to 9. This allows you to maintain strength when overcoming hills and carry out fast descent.

    Mountain Bike Drivetrain (All Mountain)

    The All Mountain drivetrain features a single chainring sprocket, combined with an 11 chainring at the rear. This makes the bike easy to operate, fast and functional at the same time.

    It is possible to determine the optimal settings by trial and error, taking into account your own riding style, the size of the bicycle wheels and a number of other factors.

    Disassembly procedure for transmission cassette

    Removing the rear of the transmission is easy. Sprocket Removal Tool Kit Next.

    • Open-end wrench for wheel removal;
    • Adjustable cassette wrench;
    • Whip;
    • Cassette remover.

    The first step is dismantling the rear wheel of the bike. Using a wrench, unscrew the nuts, then remove the chain from the rear sprockets. For some modifications (for example, for MTB), removing the wheel is literally a matter of a minute, since it is fixed on the eccentric.

    Install the puller onto the spline nut. The “whip” is used to keep the cassette from spinning. Rotate the puller with an adjustable wrench. The direction of rotation of the whip is in the opposite direction.

    Removing the nut is not easy. You will also have to work hard to install it in place. After the nut has been unscrewed, the cassette is detached from the wheel without effort. It remains only to assess the condition of the cassette and determine which sprocket is out of order.

    The outer sprockets can be removed immediately after the bicycle cassette has been removed. They are cleaned and carefully examined to assess the degree of wear. Worn out. replace.

    How to remove sprockets from a bicycle wheel. sequence of actions

    A bicycle cassette with sprockets differs from a ratchet in that individual sprockets can be replaced individually. All that needs to be done is to remove the worn part and replace it with a new one. The space between the individual sprockets on the wheel is filled with spacers and rivets, which make dismantling and mounting easier. It is only important not to confuse the sequence. This is especially true for multi-speed mountain models.

    It happens that cassettes are equipped with “spiders”. This is a design where several sprockets are rigidly fixed. In this case, if any of the parts is badly worn out, you will have to replace the entire “spider”.

    Replacing single sprockets can cause chain switching difficulties is great. This is because the chain is sufficiently worn out in relation to new sprockets. For this reason, it is advisable to replace the chain and cassette at the same time.

    How to remove a sprocket from a single speed bike (singlespeed)

    To remove the gear sprocket on a single speed bike, simply open the circlip. Many singlespeed fans argue that the “native” retaining ring is useless and sometimes breaks, even if there is no question of replacing the star. In any situation, if the stopper is out of order, you need to replace it. Otherwise, backlash is inevitable. The chain will simply dangle in different directions.

    If the sprockets are defective, the bike will not ride. Timely replacement of transmission parts is important for all bike models: from the simplest “hard workers” to the most sophisticated high-speed highway and mountain bike bikes.

    Caring for bike sprockets

    The rubbing mechanisms of the bicycle must be periodically lubricated and cleaned of dirt. This extends the transmission life and makes driving safer. After several trips on bad roads, forests or, moreover, off-road, the bike is literally overgrown with mud. If the frame and wheels can be washed clean, then the contamination of the bike mechanism is simply not visible. Therefore, after such trips, it is useful to inspect the large and take measures to clean the parts, and, if necessary, replace the worn out components.

    You can clean the bike cassette according to this algorithm.

    • Release the rim brake. Alternatively, remove the caliper on the disc brake;
    • Remove the rear wheel;
    • Examine the cassette carefully. If it is heavily soiled, you will have to remove it from the wheel and clean it. With a little dirt, you can clean the bicycle cassette from dirt without removing it from the wheel;
    • Use special narrow brushes for cleaning, which make it possible to penetrate between the gears and clean out what should not be there. In addition, it is much more convenient than penetrating the gaps with a rag;
    • An old toothbrush is great for cleaning the teeth of the stars;
    • Wipe the surfaces with a napkin dampened with kerosene. Then apply lubricant to the teeth and pits;
    • It is advisable to clean the sprocket cassette and chain at the same time. Only in this way can you achieve the desired result.
    READ  How to remove a gear from a bicycle wheel

    The system is cleaned in the same way. You don’t need to remove the bicycle wheel, but you need to work with the utmost accuracy so as not to accidentally knock off the switch setting.

    Sprockets are important transmission parts. For the bike to function normally, you need: the correct choice of gears, careful and timely maintenance, replacement of worn parts. All this allows us to make trips safer, to avoid unpleasant surprises on the road. As for the high-speed bike, it will really show itself to be high-speed, and will not sadly trudge in a single gear.

    Bicycle axle

    The hub of a bicycle is a very important part of a bicycle wheel, which allows the wheel to rotate freely around its axis. The quality of the hub determines the speed of the bike and, accordingly, the speed characteristics. In addition, the better the hub, the less energy the cyclist will spend on the same kilometer of the traveled distance. In this article we will look at the design of the front hub and the types of existing front hubs.

    The front hub is subject to noticeably less stress than the rear hub, which makes it more compact. Additional equipment is not provided, except for the disc brake rotor (depending on the model). Bushings differ in materials and manufacturing technologies, device and purpose.

    Bicycle axles are integral parts of a bicycle and are classified as components that are subject to constant stress. That is why special attention should be paid to their condition. Depending on the type of bike and the conditions of its use, they come in different sizes and differ in their design features. A high level of strength is achieved thanks to the metal from which they are made, often steel.

    The bicycle axle is an integral part of the hub and, together with it, is responsible for the level of load carried by the wheel and the bicycle, in general, for the ease of movement and immediate reliability of your favorite vehicle. Only correctly selected, and, in turn, adjusted axles can guarantee a safe and comfortable ride.

    The rear wheel spare part, in structure, is somewhat different from the front one and is more complex, due to the mounting on the rear hub of the freewheel mechanism and the block of sprockets. In turn, the rear axle withstands a high load force.

    How to choose a bike axle

    Take full responsibility for the purchase and replacement of this part. Remember that a bicycle axle can bend or break only because of its poor quality. In addition, when choosing an axle, remember that they are made of different materials:

    • titanium,
    • become,
    • aluminum.

    Which, of course, determines their reliability. For mountain or road bicycles, there are some structural features.

    DIY bike repair: rear hub

    Of course, to care for your bike, you need to understand how it works. Of course, in the structure of the iron horse there is a lot that is complex and incomprehensible at first glance, but this is not a reason to close our eyes to this. You need to look at the bike from different angles. Today we will not talk about the whole bike as a whole, but we will focus on what is in the area of ​​the rear wheel of the bike, in particular, on the axle.

    The rear axle of the wheel is stationary and is located in a special movable hub of the same wheel. It is these bushings that provide the movement of the wheel, and they do this due to the fixed axle. In order to better understand where the rear axle is, note that it is next to it that the spokes are already attached. If something happens to the cones, bushings or the rear axle, the entire rear wheel mechanism will have to be disassembled and repaired. Therefore, it is extremely important to ensure that everything connected to the rear axle remains intact and safe.

    Mountain bike axle repair

    Of course, there are situations when something in the axle breaks. Fortunately, such situations are not desperate. If something breaks, and you still do not understand which side to turn the necessary nut and where to put the cones, the Internet will help you. And we, in turn, will help you navigate the difficult repair business.

    What should be considered when renovating? First of all, you need to understand that everything related to the rear bicycle axle is a very delicate matter, which means that you need to approach it carefully so as not to make it worse.

    It is important not to lose even a single small detail. Even if you lose a small nut or cone, it will be difficult for you to finish the axle repair without them. The first step is to remove the rear axle of the bike hub, as well as the block with sprockets. Of course, when removing it, it is better to put the bike on the side where this block is not. After you remove the rear sprocket block, you will need to remove the bearing ring as well. Everything should be in order, you can see for yourself when, after disassembly and removal, a bunch of small details appear in front of you. Therefore, it is extremely important that every little thing must have its place.

    What does the rear axle of a bicycle look like?

    By the way, we recommend:

    But all this is only a preparatory stage in the repair of the rear axle, because the most difficult still lies ahead. After you put all the parts in order, and the nuts, cones and so on, as for the bushings, will not be scattered in different directions, you will need to remove the bushing screw.

    The bushing will then need to be cleaned and all components carefully inspected. This will facilitate the process of further lubrication, which takes place in two stages. This business must also be treated as responsibly as possible, because taking care of the axis is an art, and it does not tolerate haste. Before inserting the sleeve into place, the bearings must be returned to their places. Then you can gradually return each part to its place. This is how the assembly process ends, and with it the repair process.

    In summary, a key part of a bike, the rear axle, deserves to be cared for. Do not be afraid of this complex process, after the first time it will no longer seem so difficult.

    Standards: Kinds of quick-release axles for MTB wheels

    The bushings on eccentrics allow you to quickly remove the wheels and not get worn out with the necessary tools at hand. And if you think that eccentrics are flimsy and not worth your attention, then today we will dissuade you!

    QR axis

    QR or Quick-release (from the English. Quick-release). the simplest eccentric, which can be found on budget bicycles. These eccentrics are only used on bicycles with split dropouts. Due to the small diameter of the axle of 9mm and 10mm, respectively, for the front and rear wheels and the diameter of the eccentric itself 5mm, their rigidity is appropriate, but for normal riding this is not critical. Such an eccentric fulfills its purpose 100% and allows you to quickly remove and install wheels without problems. Found only in 100mm and 135mm sizes for front and rear wheels respectively.

    Thru-axle

    Thru-axle (from the English. Through the axle). have high rigidity and are used in bicycles for aggressive riding. For the rear wheel, they are produced in widths 135, 142, 150 and 157 mm and a diameter of 12 mm. The width of the sleeve itself is adjusted with spacers on the side and 135 can easily be converted into 157mm without replacing the sleeve itself. For the front with a diameter of 15mm and 20mm and a width of 100mm and 110mm, respectively.

    Front axle Thru-axle

    This eccentric is inserted into a closed dropout, which prevents the wheel from falling in while the eccentric is closed. Although use on a frame with split dropouts is not recommended, unlike a fork, you can physically mount such a wheel to the frame.

    Boost thru-axle

    Recently introduced to the market standard, sharpened exclusively for fashionable enduro. Hubs are only available in 15110mm and 12148mm front and rear wheel sizes. As usual in our industry, the rear hub came out with a new line of connecting rods for a more correct chainline, and the addition of 10mm on the front hub allowed us to make the stiffness 27.5 wheels are the same as the 26. In any case, the manufacturers assure that. On the bushings themselves, the distance between the flanges has increased, and not the thickness of the side spacers.

    How to sort out the front bushing on bulk bearings

    If you notice any extraneous sounds from your bushing or a noticeably deteriorated roll, or maybe a slight backlash, this means it’s time to sort out the bushing.

    To begin with, let’s figure out the device of the sleeve. Above is a schematic drawing of the main components, among them:

    • Axis. The part that attaches the wheel to the frames and around which it rotates;
    • Cone. By tightening the cones, you eliminate wheel play;
    • Sleeve. The body of the sleeve itself with the bearing cups inside;
    • Bearings. Balls that allow the axle to rotate inside the hub;
    • Lock-nut. Prevents the cones from spinning.

    The bushing can also contain various spacer washers and anthers.

    To disassemble the bushing you will need:

    • Open-end wrenches of a suitable size (one of them must be thin enough to fit on the cone);
    • Bearing grease;
    • Rags or unnecessary cloth to remove dirt.

    We disassemble the sleeve

    If you are not sure that you can not lose all the bearing balls, you can carry out all the manipulations on a small bucket or basin. To begin with, we suggest spraying the hub units with a degriser or WD-40 to soften the remnants of old grease and dirt.

    remove, sprocket, block, rear, bicycle, wheel

    By removing all nuts and washers securing the hub in the dropouts.

    Take open-end wrenches and holding the wrench on the cone (2) unscrew the locknut (5), then put the locknut aside.

    If after this procedure the cone does not rotate freely, then while holding the key on the other lock nut, unscrew the cone (2). Be careful! At this point, bearings will begin to spill out of the sleeve. After making sure that you have not lost the bearings, you can unwind the second cone.

    Be sure to check the bearings, taper and cups inside the bushing for wear or damage. If the bearings are worn, they must be replaced. If there is no noticeable wear, then you can start cleaning the bushing parts.

    Apply a generous amount of grease to the cleaned bushing cup. This will prevent the bearings from running in different directions during installation. Refit the bearings.

    Return one of the tapers to the bushing and apply grease to it. If you had anthers between the cone and bushing, put them back in place. Insert the taper axle into the hub.

    Turn the wheel over, holding the cone axle so that in case of something, the bearings do not go free floating around your room.

    Repeat from Step 4 (don’t forget the boot between the cone and bushing) and screw the cone onto the hub axle.

    Tighten the cones so that there is no play, and then secure the result with locknuts. Double-check that there is no play and that the axle rotates freely in the hub. Important! The distance from the locknut to the end of the hub axle must be the same on both sides.

    That’s all, the hub is assembled and ready to continue to delight you with its quiet operation and excellent roll-off. Of course, tightening the locknuts requires a little skill, but everyone can get used to it. It wasn’t hard, really?

    The text was prepared by Roman Borisov. Published: May 3, 2020. Sources: yvelo.ru, bb30.ru, bb30.ru, sportseason.ru, velostop.ru. Categories: Choice.

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