How to unscrew the rear sprocket on a bike


An inexperienced user may confuse these two parts, but the 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 breakdowns often occur due to imperfections in the design. 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.

unscrew, rear, sprocket, bike

Bicycle rear sprocket

Bicycle rear hub: device, ratchet. How to remove a sprocket from the rear wheel of a speed bike?

It often happens that the hub needs lubrication or the rear wheel sprockets need to be replaced. The repair process is easier to carry out with remove the cassette. This way things will go faster and more accurately. Of the tools you need:

How to remove?

First of all, remove the wheel. Turn the bike upside down with the wheels and unscrew the nut on the axle with a wrench. In some cases, for example, a sports bike or mountain bike, you need an eccentric clamp. Simple models do not require a special approach and tool.

The rear sprockets are attached to the ratchet with a special nut (slotted). This very nut must be unscrewed with a puller and a wrench. The latter must be appropriate in size. Unscrew the nut clockwise and use the whip. Requires to insert a puller into the spline nut in the rear sprocket of the bike.

We carefully put the whip on a large diameter sprocket. Holding the cassette, we rotate the puller with the key. This requires some effort. After unscrewing the nut, remove the cassette. The rear sprockets of the bike can be positioned independently of each other on the ratchet. It is required to remove all parts, small sprockets, washers, carefully and carefully. This is to avoid confusion of elements. Then the cassette and plastic ring are removed. After completing the replacement of worn parts, all components, including the sprockets, are assembled in order.

Remove the sleeve

Removal of this part is done after detaching the cassette. It is best to start the process on the left side. Next, the boot, locknut and cone are removed. Then you can find washers, the number of which depends on the type of bike. It is very important to remember exactly the location and order of finding all the parts. Now the stage begins in which the cone is gently unwound. If the grease is in poor condition, then it is necessary to remove the bearings and inspect them. The presence of rust, dirt and other troubles indicates the replacement of parts. With this option, good parts need to be put in place before lubrication. With a careful approach to work, the bike will function properly and accurately. Removing the bushing and other parts is not difficult, but it is important to remember the order in which they are located.

How to remove a ratchet from a bicycle wheel? To do this, it is better to use a special puller key.

Freewheel removal of junk China ones with basic tools

Why you need to change sprockets on a bike?

The sprocket on a bicycle has one of the main roles that affect ride quality and speed. During the use of a two-wheeled vehicle, a load is exerted on all its component parts.

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Replacing the sprockets is essential for proper function and gear shifting. If you do not repair parts immediately after damage, there is such an option that broken parts will accumulate and repair will be quite costly, in some situations it exceeds the cost of the bike itself.

Cassette Removal and Installation

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.

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 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.
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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.

How to remove a 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 Remove Freewheel Without Any Special Tools


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;
  • Use a whip to fix the cassette in one place, 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 a cassette on a bicycle without a puller

How to remove the rear cassette using a whip Attaching the rear cassette to the bike. How to remove the sprocket cassette from the rear wheel of a mountain bike. How to replace a ratchet. How to replace a ratchet on a bicycle without a puller. Duration: 1:51.

How to quickly remove the sprockets from the rear wheel of a bicycle. 2.

How to remove the sprocket cassette from the rear wheel of a mountain bike. How to replace a ratchet. How to replace a ratchet on a bicycle without a puller. Duration: 1:51.

How to replace a ratchet. How to replace a ratchet on a bicycle without a puller. Duration: 1:51. How to quickly remove sprockets from the rear wheel of a bicycle.

Now that the cassette has been removed, you can inspect the mechanism.

Installing the cassette must be done in the reverse order.

  • If there is a protective plastic ring, first of all we put it in place.
  • If the cassette is not combined into one non-collapsible mechanism, then you should put on the sprockets one by one, starting with the largest, while do not forget about the intermediate washers (gaskets) between the stars.
  • When all the sprockets are correctly installed, it is necessary to tighten the spline nut, this is done with a cassette puller and a wrench. Since we will have to spin in the direction of the wheel’s movement, we do not need a whip.
  • Tighten the nut with a wrench, force about 40 Nm.

The difference between a ratchet and a cassette

Before removing the sprockets from the rear wheel of a bicycle, you need to decide on their design. It is important to distinguish between ratchet and cassette. Although they are similar in appearance, they are very different inside.

In the ratchet, the freewheel is installed together with the sprockets. It is such a monolithic system that is simply screwed onto the bushing. The cassette can be disassembled, so one worn sprocket can be replaced. Unlike a ratchet, it is not a monolith with a freewheel mechanism, but is put on it.

You will need different pullers to remove them. It is important not to confuse them with each other, because they are not interchangeable. They have different splines. If you are still afraid not to distinguish a ratchet from a cassette, a photo will be an excellent tip in this matter.

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How to remove and install a bike cassette

The bike cassette mounts on the rear ratchet hub and is secured with a retaining ring. Special slots on the hub body allow the cassette to be installed in the correct position.

Bicycle sprocket care

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, the contamination of the bike mechanism is simply not visible. Therefore, after such trips, it is not superfluous 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 sprockets;

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.

Bicycle sprocket options

  • The simplest option. The stars are separated from each other by plastic spacers. The distance between the stars is strictly specified. Separate parts are fastened with rivets. 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.
unscrew, rear, sprocket, bike

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

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).

Retaining clamping ring

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.