How to change the rear cassette on a bike

Step-by-step instructions for replacing a bike cassette

A mountain bike cassette is a simple and fairly unpretentious bicycle assembly. But from time to time you still have to carry out disassembly and maintenance. Thanks to timely cleaning and lubrication, you will be able to provide this unit with a long service life and prevent the occurrence of any unexpected breakdowns in the transmission. But let’s take a closer look at how you can replace the rear bicycle cassette with your own hands, without contacting a service center.

Returning bike parts

You will need to reinstall all the parts, and then mount the wheel to the bike. In this case, we are considering the very first step, which was indicated above, but in the reverse order.

Installing a cassette

Once you have the sprockets in place, you will need to screw on the retaining ring that holds the cassette in place. Under no circumstances should the cassette be tightened tightly. This is because the thread is very fine. Due to the excessive effort applied, there is a high probability that it will subsequently be ripped off. Retaining rings prevent spontaneous loosening.

Inspecting the bike chain

Your bike cassette has been replaced. You did not have to spend money on the services of specialists, since you managed to do all the work yourself. You just spent your money on buying a new cassette, which is quite profitable. It should be borne in mind that it is quite common for a bicycle chain to wear out at the same time as the cassette. For this reason, the chain should be inspected as carefully as possible, because it may also need to be replaced.

Removing the rear wheel

Before proceeding with the procedure itself, you will initially need to remove the rear wheel from the bike, where the cassette itself is directly located. After these steps, you can easily remove the rear wheel from your bike.

How to replace cassettes on a bike?

All components of a bicycle drivetrain undergo enormous stress during the operation of the bike, so they need regular maintenance. If you see that the rear sprockets have become unusable, then you will need to replace the cassette on the bike, because the condition of both the chain and the chainring depends on its condition. If you do not service each of these parts separately in time, there is a risk that the repair of the entire transmission will immediately cost a pretty penny.

The process of removing the cassette itself is simple, but you need to know some subtleties, thanks to which the dismantling will take place without problems. There are several types of cassettes with a specific dismantling method. It is better to find out in advance for the future which one is installed with you.


To replace the cassette, you will need several keys, both special bicycle and regular keys:

  • Retaining ring puller;
  • “Whip”;
  • Adjustable wrench.

The first tool is needed to loosen the mechanism, the rest. to fix the structure. Next, we will consider step by step how the cassette is replaced on a bicycle.

How to remove the sprocket block from the rear wheel?

Turn the bike over, unscrew the eccentric, remove the chain and remove the wheel. You may need to open the brake pads if you have a rim brake system.

To start dismantling, it is necessary to put the key-whip chain on the largest sprocket: thanks to it, the system will be fixed and will not turn. After that, a ring-shaped puller is put on the wheel axle nut, an adjustable wrench is adjusted to its diameter. When you unscrew the nut, a fairly loud cracking or crunching may be heard. do not be afraid of it, this is normal, this is due to the fact that the smallest sprocket rubs against the nut, and both of them have a ribbed surface.

After unscrewing the nut, remove the wrench and puller and remove the entire cassette. Do this carefully: special gaskets are laid between the stars, try not to scatter them when dismantling, they can easily get lost. Next, carefully lay out the parts of the wheel system in the order in which they were removed so that nothing is confused during the subsequent installation. However, if you need a complete replacement of the cassette, tk. the old one has fallen into disrepair, then you can simply throw it away. However, first you should carefully examine the parts, assess the degree of their deterioration. perhaps the stars will still be able to withstand one season without harming the entire transmission.

How to wash and lubricate?

If you decide to leave the old cassette, then before putting it back on the drum, the mechanism must be cleaned and lubricated. Cleaning these bike parts is very easy: put the sprockets in a container of hot soapy water, leave for a while, and then use a brush to wipe off the dirt and old grease with force. Next, wipe the sprockets and washers with a dry cloth and leave to dry completely.

Remember to follow the sequence!

How To Replace Your Cassette | MTB Tech

By the way, if you decide to completely replace the cassette, the new system must also be lubricated before installation.


So, the parts are washed or bought again, the sprockets are lubricated. a new and clean set of sprockets can be installed in the system. Observe the reverse order of removal. First, the largest stars are put on the drum and then in descending order. Remember to insert washers between them. Last of all, a nut is put on the wheel mechanism, a ring-shaped puller is installed on it, exactly in the grooves.

Please note: the stars must be placed on the ratchet quite tightly, and the distance between them must be strictly the same.

When the nut is installed, tighten it with an adjustable wrench as tight as possible: it is very important that the system does not unwind while riding, this can pose a serious danger to the health of the cyclist.

After the installation is complete, put the wheel back on the bike, put on the chain and twist the pedals, or better, take a little ride. there should be no deviations from the usual ride, the rear derailleur should calmly transfer the chain from one sprocket to another.

How To Change A Bicycle Cassette. GCN’s Bike Maintenance Series

If you are changing the rear system completely and you are faced with the question of choosing a new cassette, pay attention to the material for making the stars:

  • If they are made of aluminum, then such a block will have a low weight, but this will make it more expensive. Such equipment is usually bought by cyclists with previous experience; beginners can choose something simpler;
  • Steel sprockets are the most popular in the cycling environment, they are moderately strong and withstand more operational loads, among the disadvantages. a lot of weight, but at the same time they have a low price. Well suited for beginners and those who rarely ride a bike. Since steel easily rusts, parts made of it must be coated with nickel, chrome or other anti-corrosion compound;
  • Titanium cassettes are lighter than steel ones, but heavier than aluminum ones, they are the most durable and are suitable for experienced riders and extreme sports enthusiasts. Such a detail will serve for a long time and faithfully, however, it will not be cheap.
READ  How to tighten the chain on a regular bike

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 fastening.

change, rear, cassette, bike

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 unhooked from the wheel. Now it remains to examine it and determine which star needs to be pulled out.

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 “spiders” can be found on cassettes. 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 tangible dissonance to the operation of the transmission. That is why it is advisable to change the cassette at the same time as the chain.

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.

The worn out part of the transmission negatively affects its entire operation, therefore the used sprocket will need to be replaced. Especially this problem 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.

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 a chain, a great will not even be able to get under way. Timely replacement of transmission system components is the most important component of any type of bike repair. from simple two-wheeled road bugs to road and mountain superbikes.

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.
  • The “whip” key is taken into your hands and placed on the sprocket in such a way that the fragment of the bicycle chain on the key is on the sprocket teeth. Pay attention to the fact that the handle of the “whip” 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 a 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 breakage of the “whip” key. Experts recommend to put 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.

READ  How to properly install brake pads on a bike

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.

How to remove the bike cassette

Cyclists often have to service their vehicle on their own. each time it will be quite expensive to contact specialized repair services. Many bicycle elements can be removed and installed quite easily and simply, but there are details that require the use of specific tools and some knowledge. These include the cassette. a part that is attached to the rear hub.

How to install a cassette on a bike

First of all, make sure that the cassette assembly matches the unfolded / removed parts. To facilitate this process, the sprockets have grooves of different sizes (for each sprocket. individual), and the bushing has suitable splines. It is the correct alignment of the grooves and splines that all the sprockets will stand in a certain order.

When installing a cassette on a bike, there are some important things to keep in mind:

  • Many cyclists lubricate the bushing surface before installing the part in question. However, experts believe this is wrong. after lubrication (until the entire cassette is assembled and installed), both dust and dirt will have time to get onto the applied lubricant, which ultimately leads to the need for maintenance, repair or replacement of elements.
  • Experienced cyclists lubricate the thread of the retaining ring before assembling the cassette. during subsequent disassembly it will be much easier to unscrew.
  • All sprockets must be worn alternately, but do not forget to put spacer rings between them. In some bike models, you can see not separate sprockets, but a single / one-piece assembly.
  • In many bicycles, to securely install the last sprocket, you need to press it slightly and only then you can screw on the retaining ring.
  • After the locking ring is screwed in, first you need to check the correct installation of the cassette and only then can it be finally tightened. Tightens the retaining ring clockwise.

Removing and installing the cassette is not difficult, because if you have a minimum set of tools and at least basic knowledge of the technical plan, all the work will take a little time, a maximum of 60 minutes. But even if such a process is to be carried out for the first time, you should not give up. the experience of removing and installing a cassette will certainly come in handy more than once. The fact is that experienced cyclists recommend carrying out such maintenance of the bicycle cassette at least once a year.

Cassettes and ratchets for beginners

In today’s article, we will learn about what a bicycle cassette and ratchets are. This article will be useful for those who are just starting to master all the subtleties of cycling.

A bicycle cassette is a system that is used in the rear sprockets of a bicycle to change the gear ratios of cassette stars. Basically, this cassette is located on the rear wheel hub. It is worth noting that with prolonged use of the bike, cassettes have properties to wear out, since they are considered consumables. That is why, sometimes, a cyclist has to change the cassette on his own or to carry out maintenance of individual stars or a node.

Cassette. is a series of sprockets that work in conjunction with a slotted fastener. You can also see their location on the hub body, where there are projections of the corresponding configuration (slots), which tell us that the cassettes are installed correctly, while the ratchet is inside the drum.

Separately about the cassette drum mechanism

This mechanism has a number of very diverse advantages, such as:

Reduces rolling resistance (the ratchet has more rolling).

Made of special materials, which greatly reduces its weight.

Does not require additional steps when removing, easy to operate.

How to Remove Bike Cassette Without Special Tools (IMPROVED

Service life is much longer than that of the same ratchet.

The ratchet is a ratchet mechanism that has a threaded or slotted mount on the bushing, the ratchet itself is outside.

Despite a large number of advantages, the ratchet has a number of disadvantages, namely:

A large number of stars, most often about five or seven.

Loads the thin axle of the bushing, which causes it to wear out and bend faster.

Twists with great torque. It looks like this: with constant cycling, the ratchet tends to twist every time on the thread of the hub. That is, every time, it will be more and more difficult for the cyclist to unscrew the ratchet on his own, without the use of a special tool.

It is also worth noting that, by its design, the cassette is a more complex functional unit, in contrast to the same ratchet, while many experienced bikers note the quality of the cassette. Therefore, we came to the conclusion that it is still worth making a choice, stopping at cassettes rather than ratchets.

The mechanism of the cassette itself is quite simple, they are put on the slots and are constantly interconnected. At the same time, if necessary, each cyclist can easily change a cassette, for example an 8-ck, to an 11-cc cassette, unless, of course, he has a special switch for the shifter. Even so, the cyclist will not have to change the rear hub. It is also worth noting that if we look at the cassettes in profile, we will definitely pay attention to the fact that they have almost the same width. Although in this case, the number of stars will be completely different, which tells us about a well-built mechanism. At the same time, in order to independently leave the width of the cassettes the same as it was, you just need to reduce the distance between the sprockets.

The stars are mounted on pins, while they are separated by attachments (spacers). It is worth paying attention to the fact that these cassettes are placed on bushings with table drums, but in some cases they are installed on inexpensive bicycles. But, the biggest plus in this is that such cassettes are easy to completely disassemble, remove the pins from the grooves and reassemble without any problems. But here it is important to know that in no case should they be put on light drums made of aluminum, because due to the high torsional load, the aluminum drum will quickly wear out and the material will simply become unusable in a short period of time. At the same time, on a spider, the stars are located on a single spider, it looks like a small ladder.

change, rear, cassette, bike

Also, the torsional force is not transmitted separately to one star, it is transmitted to the entire block of stars dressed on the spider. Due to this positioning method, the load on the drum is significantly reduced and the service life is increased. over, these cassettes are relatively lightweight, and due to their design, cassettes can be changed on the spider about the last two stars. This solution allows the cyclist to independently repair his bike, in cases where old worn-out sprockets need to be replaced. But such a solution can only be found depending on the level of the cassette, some elements cannot be replaced.

READ  Does not shift the chainring on a bike

Solid milled cassettes. the entire unit is made as one piece. That is, cassettes are put on the splines of the drum, and x is attached to the lowest star. In this case, the cassette itself acts as a slot on the drum. It is worth paying your attention to the fact that such more complex cassette designs cost a lot of money, and also have some drawbacks in use. For example, in order to supply them, you need to buy a special SRAM-XD drum on the hub. That is why they never gained their popularity among cyclists, since not everyone, even a seasoned biker, is ready to spend that kind of money for a small structure.

How to properly remove and put on a ratchet on a bike

Without special skills and tools, none of the cyclists will be able to independently service the ratchet mechanism. Since to work with the ratchet, you must have with you a puller, an adjustable wrench or a 24-27 mm wrench. Choosing the size of the wrench is based on the model of your iron horse. And to remove the cassette, you will need to get a whip for the cassette. In order to loosen the spline on their own, the cyclist will have to spend a little more effort than he would think, since it must be tightened very well so that the mechanism does not disintegrate when riding.

change, rear, cassette, bike

In order to remove the cassette, the cyclist must insert the cassette remover into the slotted nut. In this case, it is necessary to find the largest star and put a whip on it. Holding the cassette with the whip, you need to rotate the puller with a wrench, and this must also be done with proper effort, as in the previous version. After the cyclist has completely unscrewed the nut, he can remove the cassette.

It is worth noting that a good biker not only has to be able to maintain his iron horse, he also has to determine the wear of materials on his own.

Under what circumstances should a cassette be removed?

Often, it is necessary to remove the cassette if you decide to carry out full maintenance of your bike (most often they try to do this in spring or autumn). But, there is another moment when the cassette is completely worn out. In the event that while driving you notice a sharp overshoot of the pedals, then you need to immediately change the cassette in order to avoid complete damage to the mechanism.

Cassette Care, How to Clean and Lubricate

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 use. 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 examined 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 rear 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 begins 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 promptly replace worn-out parts. A working bike is the main guarantee of your safety and a cool, trouble-free ride!