How to disassemble a cassette on a bicycle into stars

Checking the status of the cassette

After you have removed the cassette, you need to examine it carefully. You need to make sure that it is significantly worn out and needs replacement. Otherwise, the replacement of this element is impractical. You can also check the functionality of the bearings. To do this, shake the cassette slightly. If you find side play, you need to consider changing bearings as well.

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.

How to Remove Bike Cassette Without Special Tools (IMPROVED

Shifting the cassette

After you have managed to remove the retaining ring, the cassette will need to be moved to the side, after which it will be removed. There is a possibility that later it can be disassembled into many different parts, such as individual sprockets, gaskets.

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.

Removing the cassette

After you are finally sure that the cassette needs to be replaced, you should dismantle it. For these purposes, you should place the wheel of your bike on a flat surface in such a position that the cassette is on top.

Then you will need to wrap the chain whip clockwise around the sprocket, which is the largest in the cassette. Then you will need to insert the puller into the groove on the wheel, which is open. This place is not at all difficult to find. You just need to locate the twelve-prong retaining ring. The ring in question has the most common and standard thread that can be unscrewed counterclockwise. Do not pay attention if you suddenly hear a grinding sound when unscrewing. It is formed by blocking teeth.

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.

steps how to change a bike cassette

Bicycle cassette is a system of rear sprockets that are designed to change the gear ratio. The stars themselves are arranged in descending order from the hub. An upshift means shifting a sprocket that is located further away. The cassette is a kind of consumable that, after long-term use, wears out and becomes unusable. For this reason, periodic maintenance is mandatory, which implies the replacement of both individual stars and the entire unit as a whole.

Replacing the cassette on a bicycle

Experienced cyclists are well aware that a set of rear sprockets of an open multi-speed (sports) bike transmission, the so-called cassette, is actually a consumable unit. Indeed, with intensive high-speed skiing, the teeth of the cassette sprockets wear out quite quickly, and approximately every 1000. 2000 km of run there is a need to replace it with a new one.

READ  Bicycle Front Speed ‚Äč‚ÄčAdjustment

disassemble, cassette, bicycle, stars

Then how do you replace the cassette on your bike? The first and best option for replacing the cassette on a bike is to take your bike to a specialized bike workshop, where this operation will be performed as professionally as possible. But, unfortunately, a good professional bicycle service in Ukraine is available only to residents of regional centers, at most, large cities. Also, many avid cyclists and their teams practice long out-of-town rides, movements, during which there are frequent serious malfunctions of bicycles, incl. and breakage of the bike transmission cassette. Therefore, any decent cycling enthusiast simply needs to have the knowledge and skills how to remove the stars from the rear wheel on their own.

What tools will be needed?

To remove a bicycle cassette yourself, it is imperative to have the following list of tools and accessories in your home workshop or in the set of portable spare parts and accessories:

  • a bicycle whip in the form of a segment of a bicycle chain attached to a lever handle;
  • 12-slot end puller (or one-piece key-puller) of the cassette retaining ring;
  • if there is only one end puller, then you also need a 24mm or 27mm spanner (open-end, box), depending on the size of the hex nut on the spline puller.

The procedure for removing the cassette of the rear sprockets of the bicycle

How do I remove the stars from the rear wheel? By and large, for this purpose, simply unscrew the cassette retaining ring, which holds together all the parts of the mechanism. This locking ring has a classic right-hand thread, you can recognize it by the Lock inscription on its surface.

But the trick is that to unscrew this locking ring, you must have a special device (special key). 12 spline puller. In this case, it is necessary to simultaneously keep the cassette sprockets from turning on the bearing. A special clever device is best suited for this purpose. a bicycle whip.

  • Perform operations to remove the rear bicycle wheel: install the bicycle on the handlebar and saddle, wheels up; unscrew the tightening nuts on the wheel axle (or loosen the eccentric fasteners); remove the chain from the cassette sprockets; remove the wheel from the dropouts, put it on a horizontal platform with the cassette up.
  • Throw a piece of the bicycle whip chain over the large star of the cassette so that the whip handle forms a lever that is easy to grip, applying force to the cassette clockwise.
  • Insert the puller into the slots of the cassette retaining ring.
  • Grip the hex of the stripper (24mm or 27mm) with a wrench.
  • Applying opposite forces on the handle of the wrench and on the handle of the whip, it is necessary to turn the retaining ring along the thread. This will most likely require considerable effort, as the retaining ring is usually dirty, stuck, and simply tight. Since significant efforts are applied when unscrewing the retaining ring, the use of various handicraft devices and non-specialized universal tools (screwdrivers, pliers, chisels, etc.) for this purpose should be avoided.
  • Unscrew the retaining ring completely, then pull up the cassette and remove it from the splines of the drum (ratchet) of the wheel hub. If the cassette is assembled on a spider, it will pull together as a single unit. If the cassette is assembled on pins, without a spider, then most likely each sprocket and spacer washer will be removed separately.

Replacing the bike ratchet

It happens that some older sports bikes still have a previous generation rear sprocket assembly called a ratchet. The multi-star ratchet differs from the more modern cassette in that it is screwed (right-hand thread) onto the wheel hub as a whole, with its entire body. Therefore, when dismantling the ratchet, there is no need to keep its sprocket from turning. It is enough to hold the wheel rim with a hand or other fixation, which is incomparably easier.

READ  Is it possible to ride a bike on the Moscow Ring Road

A special spline puller is also required to remove the multi-star ratchet from the rear wheel. It is similar but not compatible with the cassette remover. The extractor key must be inserted into the corresponding slots on the ratchet cover, and grab the hexagon with a wrench. Applying a force on the wrench counterclockwise, and holding the wheel rim with the other hand from turning, it is necessary to turn the ratchet body along the thread. As with the cassette, this can be tricky and will likely require quite a lot of effort.

Again, the question arises, how to remove the ratchet without a key (puller)? Should again disappoint enthusiasts of a non-standard approach that this technique will most likely fail. In the name of keeping your bike’s drivetrain intact, we strongly recommend purchasing and carrying a dedicated ratchet spline puller. In this case, the operation to dismantle and reassemble it will have a much better chance of success.

Cassette Removal & Installation

Bicycle sprocket care

Needless to say, all mechanisms require maintenance, otherwise they will quickly fail. If you clean the transmission of dirt as it gets dirty, it will significantly extend the life of the part.

You can clean the bike structure according to the following principle:

  • Release the brake and remove the rear wheel;
  • Inspect the inner cassette for dirt. If the dirt is strong, then without removing it will not be possible to clean, in the case when the dirt is minimal, then you can clean it directly on the bike;
  • Use coarse-bristled brushes for cleaning, but they should be small enough to get into hard-to-reach areas. An old toothbrush that is not planned to be used for its intended purpose is suitable for such cleaning;
  • Initially, a rag should be dipped in kerosene and only then start removing dirt from the sprocket;
  • After cleaning, apply grease to the brush and wipe over the teeth. Then install back.

In order not to change the asterisks, you should constantly carry out proper care and diagnostics. Spending once a month a few minutes of your time to lubricate the sprockets, you can protect yourself not only from large costs, but also wasting extra time.

Therefore, it is much easier to take care of in a timely manner than to repair your bike, especially if you use it often enough.

If a breakdown still happened, you should not be upset, but make every effort to fix it yourself.

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.

In this article, we will talk about bicycle sprockets and how you can disassemble and care for them.

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.

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.

READ  What muscles are trained on a bike


An inexperienced user may confuse these two parts, but their difference is that the cassette stars have a minimum diameter of 11T, while the ratchet has a minimum diameter of 14T. To replace the rear sprockets of the bike, you must remove the entire cassette completely.

The ratchet of the rear wheel of the bicycle has several driven stars, which are connected by a freewheel hub. The ratchet is considered not a very durable and reliable component; axle breakages often occur due to design imperfections. The ratchet can be removed for repairs in the same way as the cassette.

The efficiency and functionality of the bike depends on the rear wheel hub. The part has several components. If the stroke is heavy, then there is probably a problem and the cone is damaged. To eliminate malfunctions, unscrew the nuts with a wrench and remove the wheel. When regularly inspecting the technical condition of the transport, pay attention to the bushing taper, clean and lubricate parts and bearings. This detail is very important, it organizes the transmission of the transmission to the wheel from the pedals, as well as several other important tasks.

Required tools

In order to remove the sprockets from the bike, you must:

  • A puller suitable for slotted nuts and circlips;
  • Whip. a metal key, consisting of 10-20 links;
  • Adjustable wrench.


Step-by-step instructions for parsing:

  • The bike is installed with the wheels upwards and is in a stable position. The bike must stand on a flat surface and not carry out additional movements that can adversely affect the removal of parts;
  • We remove the wheel located at the back, this can be done using a wrench of the appropriate size. The chain for parsing the star is removed in order not to interfere;
  • With a whip we fix the cassette in one place, we untwist the cassette itself using a puller put on the nut;
  • After that, we remove the plastic ring, which serves as a kind of protection and establish a further front of work (directly install a new one or try to clean and lubricate the parts).


Step-by-step instructions for parsing:

  • The bike is installed with the wheels upwards and is in a stable position. The bike must stand on a flat surface and not carry out additional movements that can adversely affect the removal of parts;
  • We remove the wheel located at the back, this can be done using a wrench of the appropriate size. The chain for parsing the star is removed in order not to interfere;
  • With a whip we fix the cassette in one place, we untwist the cassette itself using a puller put on the nut;
  • After that, we remove the plastic ring, which serves as a kind of protection and establish a further front of work (directly install a new one or try to clean and lubricate the parts).

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:

  • 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.