How to disassemble the sprocket on the rear wheel of a bicycle

How to disassemble a sprocket on a bicycle?

Any cyclist who respects himself and his bike should have the skills to repair equipment. Then any situation in nature or in the city will not cause panic. Even if difficulties concern the sprockets of the bike.

Bike parts

The simplest bike consists of a whole set of parts. And the biggest of these is the frame. Its function is to provide structural rigidity. In addition, all other elements are attached to it: wheels, steering wheel, seat, etc.

The choice of the remaining components depends on which frame is chosen. For example, a model that is too heavy can overload weak sprockets.

The rudder is used to correct the direction of travel. He also influences a lot. Depending on the position of the steering wheel, the person’s posture changes, which can lead to the appearance of tension in the muscles or to posture disorders.

The saddle provides support for the cyclist. If adjusted correctly, it will allow you to enjoy the ride.

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Wheels with tires ensure that small bumps and bumps do not disturb the rider. And the transmission system will provide the transfer of rotation from the pedals to the wheel itself. It is here that there are asterisks, which many do not even consider as a separate part.

The condition of the chain and sprockets is inextricably linked. The fact is that the chain is constantly in motion, engaging certain teeth. This leads to the fact that the wear of the two elements is quickly evened out: a ground gear damages the chain, and a worn chain grinds down the sprockets.

Replacing the sprocket

You can often see how a person drives in the input line of a search service a request for a bike how to remove a rear sprocket. The reason is quite obvious: it seems that this set of parts is so complex that you can’t figure it out on your own. Of course, there is a rational link in such reasoning: some operations with asterisks require some preparation. However, in general, this is a fairly straightforward procedure. It is enough to perform it several times in order to learn how to do this operation without the slightest doubt and hesitation.

So how do you remove a sprocket from a bike? First of all, you need to remove the wheel, since the sprocket is associated with it. Therefore, the initial procedure will exactly repeat the recommendations for disassembling the wheel.

First of all, you need to turn the bike upside down. In doing so, he will rest on the handlebars and saddle. Additional devices such as a navigator or a travel computer are best removed. But the handles for controlling the brakes and gearshift can be left. You just need to put a layer of fabric under them to protect them from scratches.

Also, before changing the sprocket on the bike (and therefore removing the wheel), you should move the brake pads back. This only needs to be done for the rim structure, since the disc circuit of the device does not interfere with disassembly. The pads are first pressed towards each other, and then the arc is pulled out. That’s it, the pads will now neatly disperse to the sides.

In the next step, you can begin to weaken the axis. On some models, this will require slightly unscrewing a pair of retaining nuts. You will need two wrenches: one will hold the nut, and the other will unscrew the other. If the bike is equipped with an eccentric, then the process is greatly simplified. You just need to unscrew the clamp, then turn the mount several times.

After the axle is free to move, the wheel can be removed. But before that you need to free him from the chain. It should be carefully removed from the sprockets and moved aside. By the way, if the sprockets are removed for replacement, then the chain is also recommended to be changed. After that, the wheel is gently lifted and removed from the fork.

Electric Bike 101. How-to remove a freewheel, (cassette, gear cluster) from a hub motor

Now you need to carefully remove the sprockets. You will need a whip again. It holds the largest sprocket in the set. The puller can be turned with a wrench. There may be a fairly loud crunching sound, but you shouldn’t be intimidated. It’s just that the surfaces of the spline nut and the smaller sprocket have a grooved surface that makes a noticeable noise when turning.

After the nut is unscrewed to the end, you can remove the cassette. At the same time, special attention should be paid to washers-gaskets, which sometimes come across between small diameter sprockets. They must be carefully removed and set aside until assembly. Finally, the cassette itself and the protective plastic ring are removed.

At this stage, it becomes clear: how to disassemble a sprocket on a bicycle is not difficult. It is her details that are now located next to the wheel. It remains only to check for faults and, if necessary, replace the worn sprockets.

The assembly is carried out upside-down. At the end of it, you will need to adjust the gearshift system and make sure that everything works fine.

Regular inspection of the sprockets is the key to keeping your bike in good condition.

How to remove the bike cassette

First of all, you need to prepare the necessary tool:

  • cassette retaining ring remover;
  • whip. a special key to which a bicycle chain is attached (fragment);
  • adjustable wrench.

You can, of course, do without the specified specific tool. over, there are 2 such methods and both will work 100%:

Be sure to prepare an area with a flat surface, which should be within arm’s reach of the bike. this is how you can save and not lose all the parts of the bike cassette.

Step-by-step instructions for removing the cassette:

  • The bicycle wheel is removed, a special puller is installed. You need to pay attention to the correct installation of this tool: its slots must completely enter the grooves of the retaining ring.
  • A whip is taken in your hands, put on the sprocket in such a way that the fragment of the bicycle chain on the key is on the teeth of the sprocket. Please note that the whip handle should be to the right of the cassette, a fragment of the tool chain. at the top.
  • An adjustable wrench is placed on the cassette remover and rotated counterclockwise. Simultaneously with this movement, it is necessary to firmly hold the whip key in the fixed position. thus, the movement / scrolling of the sprocket is blocked. Note:in some cases, the chain may jump off during this process, which means a strong wear of the cassette sprockets or a broken key whip. Experts recommend putting a whip on a large sprocket. you can get the desired fixation effect.
  • The retaining ring is completely unscrewed, the cassette is removed.

Be sure to make sure that the removed cassette, as well as the sprockets and all fasteners, are in the removable form exactly in the order in which they were in the original version.

After removing the cassette, you can start cleaning and lubricating it. these procedures are among the mandatory for regular maintenance of a two-wheeled vehicle.

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Disassembly process of the transmission cassette

Some theory beforehand. On the rear wheel there can be two variants of parts related to gear shifting.

  • Transmission cassette. This product features modernity and innovative spline mountings that attach to the hub axle.
  • Ratchet. A somewhat outdated model typical of inexpensive speed bikes. There are no more than seven gears in a set. As for the mount, it has a thread with external installation parameters.

Let’s focus on the ratchet right away. Changing the rear sprocket on a ratchet bike is not possible. Only change the entire component completely.

Therefore, the topic of the article will be a problem describing a situation when a bicycle cassette star needs to be replaced. As for the set of stars in the transmission, up to 11 pieces are possible, depending on the bike model.

So how do you change the rear sprocket on a speed bike? Consider the algorithm of actions.

  • Take the bicycle wrench for the rear wheel and dismantle it. We sequentially unclench the levers and loosen the fixing of the nut.
  • Now it is the turn for the axle nuts. Using another key, turn off the mount.
  • The next step involves unscrewing the bearing cone and pulling it out.
  • We take out the axis with all the elements.
  • We take a special tool. a cassette remover. We insert it into the slots.
  • The whip is placed on the largest sprocket. We make rotational movements clockwise.
  • At the same time, using an adjustable wrench, the puller rotates in the opposite direction.

The preliminary stage is over. Such simple actions are possible in ordinary household conditions. We emphasize that if more than one star is worn out, but several, then it is better to replace the entire cassette at once. This option is also desirable when the largest star is damaged.

And one more recommendation. We put all small parts, washers and nuts in a certain place, so that later we do not search all over the room

How to remove a sprocket from a bike

The sprockets of a speed bike are the main parts of the gearshift system that provide the gear ratio of the drivetrain. According to the degree of influence, they are divided into leaders and followers. The first ones are located at the connecting rod pair and are called the system. The driven ones are located on the rear wheel hub and are divided into cassettes and ratchets by design.

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Over time, the stars wear out, as a result of which they need to be completely or partially replaced. The second option is more common in practice, since the wear is uneven. The most frequently used transmissions are subject to it. The problem, of course, requires a timely solution, otherwise driving will turn into torment. The chain will seize or skip worn stars. Many modern models allow you to remove the sprocket and put it separately on the system or cassette without replacing the entire assembly. Read on how to do this.

Star stripping process

How to change the rear sprocket on a bike after the first stage has already been passed.

  • Removing the mount.
  • Detach the cassette from the rear wheel.
  • We make a thorough inspection.
  • Determining Wear Sprockets.
  • We remove the worn out product.
  • Pay attention to the arrangement of the stars and the sequence of fasteners and washers between them.

Cassettes compare favorably with ratchets in that each worn part can be freely removed separately.

A separate recommendation would be to replace the chain, which is also worn out, along with the sprocket.

Change the sprockets on the rear wheel of the bike

The drivetrain plays a very important role in the operation of the entire bike, so you must carefully monitor the wear of individual parts of it. This is especially true for the rear wheel sprockets, which fail over time. A worn-out sprocket must be replaced as soon as possible, and it will not be difficult to do this.

Before starting the replacement process, get yourself the tools you need to help you. It:

  • Whip
  • Cassette remover
  • Rozhkova and adjustable wrenches

First, remove the rear wheel from the bike. This is very easy to do. Unscrew the nut with a wrench and release the chain. Owners of mountain models just need to press on the special mount and the wheel will be dismantled. Next, we install a removable device on the slotted nut of the cassette. Here we need a whip to prevent the cassette from turning. While we rotate the puller with an adjustable wrench, hold the largest star with a whip.

Using a nut, unscrew the cassette and remove it from the wheel. We carefully examine the stars and determine which one has become unusable. Start with the smallest and end with the largest. The bike drivetrain is designed in such a way that you can only replace the worn out sprockets and not the entire cassette. Therefore, having inspected the cassette, you remove the used parts from it and replace them with new ones. It is very easy to pull the star out of the cassette, this is facilitated by special rivets. The main thing is to carefully remember the order of the stars, so as not to get confused with their installation back. In the configuration of some bikes, you may find so-called spiders. It is a group of several stars that are inextricably linked. In this case, you will have to replace the entire spider. Many cyclists are faced with the following problem. After replacing several stars, there is great discomfort in the operation of the chain. This is due to the fact that the chain has already passed a certain mileage, has worn out and now it is difficult for it to interact with new parts. Therefore, experts recommend the simultaneous replacement of the chain and worn sprockets. This greatly minimizes the complexity of your bike’s drivetrain.

If you own a single speed bike, the process of replacing the chainring will be simplified to a minimum. You just need to open the retaining ring. If your own ring has become unusable, it must be replaced immediately, even if you are not going to replace the stars in the near future. Otherwise, the chain will lose its fixation, and this threatens with backlash. The process of replacing the ring is very simple, you do not need to perform the slightest forceful manipulations. Therefore, if you are talking about a single-speed bike, everything is very easy and understandable here. However, the owners of such models should carry out the process of dismantling the cassette only if one or more of the largest stars have worn out. If a small asterisk starts to fail, this is not a cause for concern. Whatever you ride, remember that both the simplest road bike and the super-fast bike need a proper transmission. A badly worn chain and stars will not allow you to drive even a couple of meters. Pay close attention to the mechanics and replace worn-out parts in a timely manner. A working bike is the main guarantee of your safety and a cool, trouble-free ride!

Stages of installing new stars

How does assembly work when replacing a bicycle cassette chainring?

  • Install a new sprocket and fix it.
  • We assemble the cassette completely in the reverse order.
  • Using a puller, mount the drum to the slotted area.
  • The drum must first be leveled.
  • Next, we carry out the process of assembling the bushing. All actions described in the first paragraph are carried out in reverse order.
  • Install the rear wheel and fix it securely.
  • Put on the chain.

It is imperative to check the smooth operation of the transmission. This procedure involves adjusting the rear derailleur.

If everything is carried out according to the proposed instructions, feel free to get on the bike and enjoy the ride.

Replacing the camera

First of all, you need to lower the wheel. unscrew the cap and release the air by pressing the nipple. If the chamber is damaged and there is no air in it, simply remove the cap. To remove the tire, you will need mounting paddles, with which it will be convenient to pry on the tube until it becomes easy to pull it off the rim.

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The camera can be replaced without the need for tools. First, the nipple is inserted into the hole in the rim, after which the tire is evenly put on the rim. Finally, the camera needs to be pumped up to the desired state.

We work with the inner space of the bushing

After the axle has been removed, you need to carefully inspect it. As a rule, this part of a bicycle wears out very rarely, but in any case, you will need to thoroughly wipe it off from dirt and dust. This is done with a dry cloth, but in some cases (if heavily soiled) you can use gasoline. So, we wipe the left cone and examine the right one for fastening strength. Only after the axle walls are completely dry (if gasoline was used for processing), can new grease be applied to it.

Note: in no case should you use chain lubricant or some other lubricant for the rear hub of the bicycle. you will need to purchase a special tool. Bearings are often used for bearings. this lubricant will be the most suitable. Too thick a layer of grease should not be applied. during the operation of the bike, it will be squeezed out and actively absorb dirt, which leads to rapid wear of the part.

Dismantling sequence

First, remove all unnecessary items from the bike that may be on it. And it is also better to unscrew all kinds of mirrors, flashlights and other little things that can be damaged during work.

  • We turn the bike upside down, put it on the handlebar and seat. You can do without a special rack for repairing a bicycle, the main thing is to give it a stable position.
  • We find out the type of brakes installed for further action. As usual, these are disc or rim brakes:
  • disc brake. It will be easier to remove the wheel with it;
  • The rim brake of the V-brake type must first be released and removed, otherwise further dismantling of the wheel will no longer be possible. (It is not difficult to release the brakes, for this you need to move the cable to the side of the fastening screw, move the levers, removing the end of the cable from the clamp, lower it down and spread the brake levers to the sides).
  • Then we act depending on the type of fastening of the rear wheel to the bicycle axle. We unscrew the nuts with a wrench (one or two) or, if the mount is a disc eccentric, unscrew the brake lever and twist the wheel.
  • The chain passing through the gearshift system is neatly removed from the sprockets.

The wheel is removed. Now you can carry out all the necessary further manipulations: replacement, adjustment, lubrication of parts.

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Bicycle front wheel design

Before proceeding directly to the removal and disassembly of the front wheel of the bike, which is responsible for the trajectory of the bike, you should know what parts the structure consists of. The wheel is perhaps the main element of the bike, which has undergone some modifications least of all. Naturally, today you can buy bicycles equipped with alloy wheels, all-round wheels (for driving on a track). However, in general, regular bikes, speed bikes, or other models have traditional spoked wheels.

The front wheel is structurally simpler than the rear one and consists of the following parts:

  • sleeve;
  • rim;
  • knitting needles;
  • flipper. a rubber band (gasket) on the inner side of the rim, which protects the chamber from being punctured by the needles;
  • tire and tube;
  • disc if the bike is equipped with disc brakes.

Having dealt with the device, we proceed to the next stage.

Rear brake hub design

Planetary hubs (Fig. 1) were invented for motorcycles in the 19th century, for some time this device was forgotten, but has received its second life in our time. Used to change speeds on a bike. The sleeve received this name for its similarity to the solar system. In the planetary hub, the gears rotate around the rigidly fixed axis of the hub, like planets around the Sun. Benefits of planetary hubs:

  • Such bushings are more reliable than cassette units and manufacturers are increasingly returning to these mechanisms, using them in designs.
  • Thanks to the device using planetary bushings, the speeds can be switched not sequentially, but immediately.
  • The planetary hub does not require constant maintenance, disassembly, cleaning and washing.
  • Such bushings are strong enough and will not be damaged even by strong impacts.
  • Thanks to the use of a planetary hub, the spokes on the rear wheel can be fixed more rigidly, which gives it additional rigidity.
  • Hubs of this type allow you to use the brake even on wheels with a figure eight.

The disadvantages of planetary hubs are their high cost and high weight, but this does not prevent them from being used for city bicycles, whose owners do not chase the lightness of a bicycle.

A hub dynamo is a type of bicycle hub that is capable of generating electrical energy. Such bushings have come to replace dynamos. Such bushings provide the bike with an autonomous light source, but at this time this is not entirely relevant since there are rechargeable batteries.

Disassembling the front hub

To disassemble the front hub you need:

  • unlock the eccentric or unscrew the fixing nut;
  • unscrew the lock nut under the boot;
  • dismantle the cone with a special cone wrench;
  • remove the cone and pull out the balls, in case they are inside.

How to remove sprockets from the rear wheel of a bicycle?

It is absolutely not difficult to disassemble the device for replacement, but you should be careful and have a couple of free hours in stock.

In some situations, the disassembler initially spends 15 minutes, and another person without the necessary skills can handle it in 1-2 hours.

That is why it is difficult to answer the question of how much time can be spent on a laborious process. In most, all stars have the same parsing method, since they have almost the same structure.

Helpful hints for parsing:

Freewheel Removal & Installation

  • How the parts are removed, in this order they should be installed. This advice will help from confusion and waste of extra time that can be spent remembering where a certain detail came from;
  • After parsing, every detail needs to be inspected, perhaps it does not require replacement, but a banal cleaning is simply necessary.

Bicycle sprocket design

The mechanism externally has several stars of different sizes, which are fixed with a bushing. After that, everything is connected with a lock nut.

  • The usual version is that the stars are connected to each other by a plastic spacer;
  • Spider cassette. cassettes made in the form of stars, fixed on an aluminum frame;
  • On several spiders. devices that have a high cost and are usually installed on professional and expensive models. The appearance has 2 spiders, which are connected by sets of stars;
  • X-Dome is a monolithic system that connects the drum to the lid on the opposite side;
  • OpenGlide. Most Relevant for Road Bikes.

How to replace a sprocket on a bike?

Replacing the sprocket should start with removing the old one, respectively, only then start the installation. If an old part is installed, it must be cleaned and lubricated, only then install.

  • We put on a protective plastic ring;
  • If the stars themselves are not fastened to each other, then they should be worn one at a time, starting with a large one and ending with a small one. We install small rubber pads between the stars;
  • We screw it with a nut, this must be done directly with a wrench. Twisting is carried out according to the hour hands;
  • We fix the nut and check the movement of the nut.

How to remove a sprocket from a bike

The sprockets of a speed bike are the main parts of the gearshift system that provide the gear ratio of the drivetrain. According to the degree of influence, they are divided into leaders and followers. The first ones are located at the connecting rod pair and are called the system. The driven ones are located on the rear wheel hub and are divided into cassettes and ratchets by design.

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Over time, the stars wear out, as a result of which they need to be completely or partially replaced. The second option is more common in practice, since the wear is uneven. The most frequently used transmissions are subject to it. The problem, of course, requires a timely solution, otherwise driving will turn into torment. The chain will seize or skip worn stars. Many modern models allow you to remove the sprocket and put it separately on the system or cassette without replacing the entire assembly. Read on how to do this.

How to remove and put a system star

The system is a set of three chainrings. If you often have to ride at speed, then most likely the largest sprocket will wear out. Conversely, with frequent off-road trips, wear will affect the first (smallest) sprocket. By analogy with the second, middle sprocket, when the bike is used at medium speeds in conditions of a dirt road or bad asphalt.

On a modern mountain or road bike, the system is collapsible, so it will not be difficult to dismantle all the stars. Before work, you need to carefully prepare, namely, collect all the necessary tools:

Removing the system from the bike: 1. Place the frame in an upright position. If you have a stand, you should definitely use it.

Remove the right crankshaft axle fixing bolt with a hexagon.

Unscrew the pedal from the right crank arm. A standard open-end wrench is suitable for this.

Insert the puller into the connecting rod to remove it from the carriage. To begin with, we screw the tool all the way into the thread. It is important that it sits flat on the shaft, otherwise the axle can be damaged when unscrewing the connecting rod. Place the spanner wrench on the puller and screw it in until it stops until the connecting rod is pushed out of the carriage shaft.

The two stars are usually attached to each other on a so-called spider. The big one remains on the connecting rod itself. Unscrew them with the hex bolts.

This is how the system understands. Replacing and installing looks like the reverse process:

  • Place the desired sprocket on the spider and tighten the fasteners. Change the large part together with the right connecting rod and screw the medium and small sprockets onto it.
  • Next is the installation of the connecting rod on the carriage. Before this, it is advisable to clean and lubricate the carriage shaft.
  • Carefully place the chain on the system and screw in the connecting rod by rotating the puller in the opposite direction.
  • Tighten the fixing nuts and fit the plugs.
  • Screw the pedal onto the connecting rod.

When replacing one star, it is advisable to clean the old ones. Lightly grease the system components before installing on the carriage.

So just replace the chainring. All of the listed tools are required. The connecting rod is a delicate thing, and a hammer and chisel is not the best option for removing it. The same goes for keys. It is difficult to replace them with pliers, besides, it can easily eat nuts. Well, without hexagons, it is impossible to disassemble the system into parts.

At the end, check the operation of the transmission. whether everything is in order and whether it is necessary to adjust the speed switch.

Changing the sprocket on the rear cassette

The set of transmission stars of the rear wheel is several times larger than the front one. The standard kit includes eight components, and in high-speed models (or on a sports bike) there are 9 or 11.

It is worth mentioning right away that a cassette or ratchet can be placed behind. The cassette is a modern version with an internal splined mounting on the hub axle. Ratchets, as an outdated option, can only be found on a budget high-speed bike. The set usually includes 5-7 gears. External mount, threaded, removable tool differs from cassette.

The fundamental difference from the cassette is its integrity. it is impossible to change the star separately on the ratchet. Here, either all at once, or nothing at all. Therefore, we will consider how to install a new sprocket on the cassette.

As with replacing the leading stars, special tools are required here:

  • cassette remover;
  • chain whip-retainer;
  • adjustable wrench or head;
  • optional: wrenches, chain release.

When removing the cassette, you will need to first remove the rear wheel from the bike and then the axle nuts. At the same time, when replacing the sprockets, you can also clean the chain. to remove it, you need a squeeze.

Sequence of work: 1. Remove the rear wheel with a 15 wrench, with eccentric fastening everything is simple. unclench the lever and loosen the fixing nut.

The next step is to unscrew the axle nuts. You will need a 17 key for it. To roll the mount off the rotating axle, we put on an additional nut to fix the axle.

Unscrew the bearing cone and pull out the bearing from the opposite side.

Remove axle with taper and bearing. About the bushing components: if necessary, you can immediately replace them with new ones.

Place the whip on the largest (lowest) star. We will rotate it clockwise.

Use an adjustable wrench or a head to turn the puller counterclockwise.

It is so easy to shoot a cassette at home. Most modern star sets are collapsible, you can install one or two new stars. However, in case of severe wear, when half of the cassette is worn off, it makes no sense to change them separately. Difficulties can also arise if the largest sprocket has been erased, on which all the others are usually attached.

Is it possible to dismantle a cassette without a puller and a whip? In principle, this can be done with a slotted tube and a spanner. The whip can be made by yourself by welding a piece of an old chain to the metal handle of the knife.

When replacing individual stars, especially the middle ones, we disassemble the cassette carefully so as not to lose all the spacer and fixing washers. Everything is easier with a cassette on a spider. it does not need to be disassembled, the star is removed separately from its mount.

Rear transmission assembly:

  • Put and fix a new star, assemble a cassette.
  • Using a puller, install the drum on the spline mount of the sleeve. Before tightening, the drum must be leveled so that the connection does not wear off under load. The whip is not needed here. just rotate the puller clockwise with effort.
  • Assemble the bushing: insert the axle from the side of the cassette, then the bearing and the cone on the left side, fix the axle with nuts.
  • Put on the chain and put on the rear wheel.

Check transmission operation and adjust rear derailleur. Timely replacement of sprockets will save you from unpleasant surprises on trips and will generally increase the resource of the bicycle transmission.

How to change sprockets on a bike?

The bicycle is becoming more and more popular nowadays. This is due either to paid parking and the high cost of gasoline, or to the currently fashionable healthy lifestyle.

But almost everyone loves to ride a bike, but not everyone knows how to properly care for it. Naturally, over time, parts fail and they should be replaced with new ones or serviced.

Within the framework of this article, we will talk about bicycle sprockets and how you can disassemble and care for them.