How to change the rear sprocket on a speed bike

How to remove the sprocket from the rear wheel of a speed bike

A speed bike drivetrain consists of three main elements: a derailleur on the rear wheel, a derailleur (shifter) on the handlebar, and a set of sprockets. The latter bear a heavy load, so they are subject to rapid wear. Before removing the sprocket from the rear wheel of a speed bike, you need to learn how to do it correctly. Errors made during disassembly will lead to damage to the part, or failure of the ratchet bearings (it all depends on the type of design).

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 a straight position. If you have a stand, you should definitely use it.

Remove the right crankshaft axle fixing bolt with a hexagon.

change, rear, sprocket, speed, bike

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 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, the nuts can easily “eat”. 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.

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 replace the rear sprocket on a speed bike

There are not many key parts to a speed bike. The main ones include the stars, which serve to switch speeds with the provision of gear ratios in the transmission. With the constant operation of the bicycle mechanism, worn sprockets are formed. This is facilitated by the usual physical process. friction. What is the threat? The chain starts to jam and simply slips deformed parts.

The problem that has arisen requires an immediate solution. If the question is ignored, then any movement on the road will turn into a solid negative. The model of a modern bike allows you to change a worn out part. Our article will tell you how to replace the rear sprocket on a high-speed or mountain bike.

Make Your Bike Faster With Sprocket Replacement

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 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 over worn sprockets. 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.

Disassembly process of 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. The set contains no more than seven gears. 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, we 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.
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The preliminary stage is over. Such simple actions are possible in ordinary home 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 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.

Procedure

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).

Change 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 fastening, 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 an eccentric mount 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.

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 cassette side, then the bearing and 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, in general, increase the resource of the bicycle transmission.

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.

Procedure

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).
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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 bicycle, 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.

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.

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 begin 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 rear sprocket on a speed bike

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 disc brake caliper;
  • 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;
  • Wipe the surfaces with a cloth soaked in kerosene. Then apply lubricant to the teeth and pits;
  • It is advisable to clean the sprocket cassette and chain at the same time. This is the only way to 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.

Disassembly procedure for transmission cassette

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

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

The first step is to dismantle 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 attached to the eccentric.

Install the puller onto the spline nut. The “whip” is used to keep the cassette from spinning. Use an adjustable wrench to rotate the puller. 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 that 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 the new sprockets. For this reason, it is advisable to replace the chain and cassette at the same time.

Tools

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

Bicycle sprocket options

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

Cross-country drivetrain

This style of driving involves driving long enough distances, and the condition of the road, to put it mildly, is 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 a quick descent.

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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:

  • connecting rod puller;
  • spanner key;
  • hexagons;
  • new detail;
  • clean cloth and grease.

Removing the system from the bike:
1. Place the frame in a straight 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 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, the nuts can easily “eat”. 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.

How to remove a rear sprocket on a speed 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 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.

How To Change A Track Bike Or Fixie Sprocket

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, hassle-free ride!