How to remove the rear sprocket?
Of the tools you need:
- The right size wrench.
First of all, remove the wheel. The bike must be turned upside down with the wheels and with a wrench. Unscrew the nut on the axle. In some cases, for example, a sports bike or mountain bike, an eccentric clamp is needed. 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. Need to insert a puller into the spline nut in the rear sprocket of the bike.
The whip is carefully put on a large diameter sprocket. Holding the cassette, turn 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.
Tightening the nut is done with a wrench and with the application of maximum efforts, but the main thing is not to overdo it and tighten the bushing cone NOT too much.
Bicycle rear sprocket
A bicycle is a means of transportation, driven by the physical strength of a person. This is how you can describe the essence in technical words. In fact, he is a friend from childhood. As soon as we start to grow up and understand something, we drag our parents to where you can choose a bike and shouting: “Buy !!” and that it might break. Even an old bike can still serve.
The most common question about servicing a bike and rear hub (excluding device, ratchets and sprockets) is “How do I remove the 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 if the cassette is removed. Thus, things will go faster and more accurately.
How to remove ratchets from a bicycle wheel?
In order to adjust the bearings on the rear hub, to replace a worn sprocket, and sometimes to replace the broken spokes of the rear wheel, it is necessary to remove the cassette from the sprocket. This is not so difficult to do. By and large, the algorithm of actions is the same as with a separate asterisk.
Disassembly and diagnostics of this part is carried out after separation of 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.
By the way, we recommend:
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 carefully unwound. If the grease is in poor condition, 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 must 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 of their location.
When you need to replace your rear bicycle sprocket
An inexperienced user may confuse the sprocket and ratchets, but their difference is that the cassette stars have a minimum diameter of 11T, and in the ratchets. 14T. To replace the rear chainrings 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.
Here the rear wheel hubs depend on the efficiency and functionality of the bike. The part has several components. If the stroke is heavy, then there is probably a problem and the cone is damaged. To eliminate faults, unscrew the nuts with a wrench and remove the wheel.
During regular inspection of the technical condition of the transport, pay attention to the bushing cone, 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.
We remove the asterisk ourselves
1. Turning the bike over and Installing it on the handlebar and saddle.
2. First of all, remove the wheel by unscrewing the fastening nuts.
Children bicycles are usually repaired, as a rule, by dads, and they have enough strength to fix the largest sprocket with a whip and put the wrench on the puller. Unscrew the slotted nut. Everything is unscrewed towards the idle wheel and at the same time a small crunching sound is heard, and do not be alarmed, this is due to the shape of a small asterisk.
4. Having unscrewed the nut, remove the cassette. Considering that there may be intermediate washers between the small sprockets instead of spacers. To replace the sprocket you need a set of tools.
5. Disassembling this whole structure, carefully fold all the parts so that they lie in the sequence in which you removed them, otherwise difficulties will arise during assembly.
6. Having removed all the sprockets and the cassette, the protective plastic ring is removed last. Inspect all removed parts carefully, replace worn ones, clean and fry, so that after assembly the assembly will run for a long time.
7. The assembly of the sprocket cassette is carried out in the reverse order. The chain is put on, the rear wheel is spun, the device turns over and it is again ready to surf the roads brings joy and pleasure from the movement.
Varieties of bicycle cassettes
A set of rear sprockets on a bicycle is called a cassette. Cassettes are available in 6, 7, 8, 9, 10, 11, 12 speeds. The cassette with 6 speeds is placed on children’s bicycles, 7 speed, on budget, walking bicycles. Cassette with 8 stars, corresponds to 24 speed transmissions, which are installed on mid-range bicycles, at 9. 12 speeds on mountain and racing, sports bikes.
The large number of stars allows you to adjust the gear ratio, for more comfortable pedaling, the smaller the chainring, the faster the rider. If the switch is set to a large star, then you can easily climb the hill.
A set of sprockets for 6-7 is in the form of a ratchet, which is screwed onto the bushing and cassettes, which is put on the bushing drum and fixed with a nut. I change the cassette when obvious tooth wear is visible and the chain slips.
Text prepared Roman Borisov.
Posted: May 30 2020.
Sources: uznayvse.Ru, yvelo.Ru, mighty-sport.Ru.
Headings: Micro-records, Repair and maintenance.
- A bike
Tools for work
- Hexagons or special Torx keys (asterisks)
- Carriage puller;
- Special wrench puller.
How to replace chainrings on a bike?
- How to replace front sprockets.
- Tools for work
- How to replace asterisks?
- Replacing stars
Change chainrings on your bike with our step-by-step guide. Replacing sprockets on a road or mountain bike is a fairly straightforward task, but one that needs to be done urgently when the cogs wear out. You can swap the chainrings to change the gear ratio, lowering which will make it easier to climb slopes, and increasing it will speed up in flat races.
Before starting work Find out the exact landing diameter of the star (PDD) of your system of leading stars to purchase new ones. Typically PDZ 110 or 130 mm. or significantly reduced or traditional size. If the bike is equipped with a 50x34T system, then the PDR is almost certainly 110 mm. If it is 53x39T, then the PDZ will be 130 mm.
Of course, you can always measure the circumference of your system to be sure. There are exceptions such as, “four-legged” used in Shimano’s newest 11-speed hitch, for which sprockets of various sizes are available without worrying about the difference in PDZ.
How to replace front sprockets. How to replace sprockets?
1. If your goal is NOT just to replace the outer sprocket. which can easily be done by removing the mounts and threading it through the connecting rod. you will have to start by removing the drive sprockets. Some high-quality connecting rod systems allow you to remove the sprocket bolts with regular hexagons or special Torx wrenches, but if your sprockets have regular bolts, you need either a special puller wrench that can be placed in the slotted grooves of the sprocket nut or another hexagon (often 1 mm larger, than the front), holding the nut from turning. Special wrench. Puller keeps the sprocket nut stationary while screwing out or screwing in the bolt.
Lock the nut and unscrew the bolts counterclockwise. Take them out carefully, they will come in handy for installing new sprockets. You can now remove the old chainrings or clean them thoroughly if you only replace the outer chainring to change the gear ratio.
When replacing the asterisks, you need to Pay attention to their relative position.
The outer star, usually the largest, has a small pin protruding from one side. The sprocket should be positioned so that the pin is behind the crank arm to prevent the chain from being completely seized if it comes off and falls between the outer sprocket and the crank arm.
Chamfered edges of the cogs. which aid in gear shifting. either the brand name or any other markings Must be visible from the outside when installing the sprocket.
Install the sprockets with the markings outward, so that the most correct positioning the teeth for smooth gear shifting. When the sprockets are located correctly, insert the nuts into the holes. Fix them with a special wrench or hexagons, then screw the bolt into the nut clockwise until you feel a slight resistance, while fastening the sprockets.
Repeat these steps for all bolts, and then Tighten each bolt in turn one quarter turn at a time until it stops. A torque wrench can be used to do this by tightening the bolts to the torque indicated on the bolts.
Install the connecting rod from the sprocket to here, without forgetting to thread them through the chain. Pedal and switch speeds to make sure everything is working properly. If you have resized the outer sprocket, you may need to readjust the front derailleur for smoother speed changes.
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. Between the stars there are special rivets and small spacers, 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 on cassettes “spiders” can be found. rigidly fixed areas of several stars. Here you will have to replace the entire set, on which one of the stars is heavily worn. True, this only applies to large transmission rear wheel sprockets.
When replacing a single chainring, you can face 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 with one detail it is not so noticeable, then several new stars will immediately make a noticeable dissonance in the operation of the transmission. That is why it is advisable to change the cassette simultaneously with the chain.
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 mount.
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 is folded, the cassette can be safely detached from the wheel. Now it remains to examine it and determine which star needs to be pulled.
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.
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, so the used sprocket will need to be replaced. Especially this problem pops up on the asterisk, used too often, which, in principle, is logical. Before changing, it is necessary to remove the worn sprocket from the rear wheel, in which we will talk further.
A little about singlespeed
To remove the rear transmission sprocket from a single speed bike, you only need to release the circlip. Among the fans of singspeeds, you can hear that the regular ring is useless and can break, 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 placed, it is not even necessary to compress 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 chainring with a larger diameter.
As you know, without serviceable stars and a chain, the Great One will not even be able to move. Timely replacement of components of the transmission system is the most important component of repairing any type of bicycle. from simple road two-wheeled “bugs” to road and mountain superbikes.
How to replace a rear sprocket on a speed bike
There are not many key parts in 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 modern VELOBIKE model allows you to change a worn out part. Our article will tell you how to replace the rear sprocket on a speed or mountain bike.
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 out part can be freely removed separately.
A separate recommendation would be to replace the chain, which is also worn out, along with the sprocket.
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 DO NOT carry out additional movements, which may 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;
- Whip We fix the cassette in one place, spin up the cassette with a puller, put it on the nut;
- After that, we remove the plastic ring, which serves as a kind of protection and install a further front of work (directly install a new one or try to clean and lubricate the parts).
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 elements of a bicycle can be removed and installed quite easily and simply, but there are such 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 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.
In the case of a new one, you need:
- 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. Place 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.
Stages of installing new stars
How does assembly work when replacing a bicycle cassette chainring?
Let’s look at the steps.
- Installing a new asterisk and Fixing it.
- Assembling the cassette in 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 sleeve. 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 done according to the proposed instructions, feel free to get on the bike and enjoy the ride.
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, the parts fail and they should be replaced with new ones or they are serviced.
As part of this article, we will tell you about bicycle sprockets and how you can disassemble and care for them.
How to remove a sprocket from a bike
The sprockets of a high-speed bike are the main parts of the gear shifting system, which provide the gear ratio of the transmission. According to the degree of impact, they are divided into leading and slave. The first are located in 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 their full or partial replacement is required. The second option is more common in practice, since wear is uneven. The most frequently used programs are subject to it. The problem, of course, requires a timely solution, otherwise driving will turn into torment. The chain will jam or skip over 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 rear sprockets from a mountain bike
Number of stars
The bike cassette can be adjusted based on the number of stars. Mechanisms that contain 7 stars can be found on old bicycles. The most common cassettes are 8-10 stars. Such systems are installed on the most numerous modern bikes, from mountain and ending with road. The 11 stars can be seen on Campagnolo cassettes. Their installation becomes available only when using a sleeve of the same brand.
You can determine the nature of the existing cassette by looking at the special markings. So, the designation “11-36T, 10 speed” indicates that the largest star contains 36 teeth, and the smallest. 11. There are 10 stars in total.
There are several types of bicycle cassettes:
- Dismountable. The most common group of mechanisms, where all the stars, in addition to the two smallest, are connected into a single whole using screws or rivets. This method of fixing structural elements facilitates assembly and maintenance. At the same time, the implementation of such a solution is accompanied by an increase in the weight of the system and the tendency of its components to clog.
- On the Spider. cassettes of this plan are made in the form of stars assembled on an aluminum frame, which, in fact, is called a spider. The latter is joined by the smallest two stars. Spider cassettes are easy to clean and lightweight.
- Several Spider. expensive products that are installed on professional models of bicycles. They consist of two spiders, each of which is joined by sets of 2-3 stars. The main advantage of this solution is the ability to quickly replace a worn out element. In this case, the second part of the system remains in a functional state. The presented mechanisms are lighter than demountable structures. In addition, they are easier to clean from small debris and dirt.
- Open Glide are monolithic cassettes designed for installation on Road bikes. Such cassettes are fixed on the slots of the ratchet drum with a lightweight aluminum nut and a special cover on the other side.
- The X-Dome is another monolithic system. It is fixed in a small sprocket with a lock nut, and at the very base of the mechanism, a large sprocket serves as a mount. Most often, the structural elements of the nodes of this plan are made of lightweight aluminum.
Replacing the cassette on a bicycle
Assembling the cassette is done in the same way as disassembling, only in the reverse order, so it is so important to remember it, especially if you are doing it yourself for the first time.
- Put the chain on the star.
- Reinsert the rear wheel and tighten it firmly until it stops.
- Check secure fit.
- Turn the bike over. And you’re done!
How to remove a sprocket from a bicycle wheel with your own hands
The bike drivetrain needs constant maintenance. The chain and sprockets on the wheel are most susceptible to wear. A single-speed bike is not insured against such breakdowns. The only difference from multi-speed models is that the chain and stars are designed for a longer service life. Consider how to remove a sprocket from a wheel for later replacement.
First, why is it necessary and can you do without it? No comments. A partially worn drivetrain will impair the performance of the entire bike. Therefore, the star must be replaced in case of breakdowns. This is especially true for asterisks, which are used especially often. Naturally, before doing repairs, the worn part must first be removed.
Mountain Bike Drivetrain (All Mountain)
The All Mountain drivetrain features a single chainring sprocket, combined with an 11 chainring at the rear. This makes the bike easy to operate, fast and functional at the same time.
You can determine the optimal settings by trial and error, taking into account your own riding style, the size of the VELOBIKE wheels and a number of other factors.
The likelihood that the downhiller will have to overcome a steep climb is small. Because of this, many DH bikes only have one forward gear. Rear cassette gear limited.
The last word in singlespeed
Single speed bicycles have a retaining ring. Thanks to this, the star can be replaced in a few minutes. Simple enough to unclamp this ring. Singlespeed fans claim that standard rings are flimsy and can break even if you DO NOT use them for replacement. There is a deal of truth in it. Therefore, it is worth constantly checking its condition and replacing it with a new one from time to time. Otherwise, the chain will simply dangle from side to side.
The assembly of this structure does not require any special skills. The ring is inserted without any effort, this is probably the most important plus of THESE models.
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Sprockets are important transmission parts. For the bike to function normally, you need: the correct choice of gears, careful and timely maintenance, replacement of worn parts. All this allows us to make trips safer, to avoid unpleasant surprises on the road. As for the high-speed big one, it will really show itself to be high-speed, and will not be sadly dragged along in a single gear.
Bicycle sprocket options
- The simplest option. The stars are separated from each other by plastic spacers. The distance between the stars is strictly specified. Individual parts are fastened with rivet studs. 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, which is fixed on an aluminum sprocket. The latter carries slots for the drum. The result is a reliable, lightweight and durable construction for a speed bike.
Cassettes are consumable items and must be replaced periodically. On average, from 5 to 15 thousand km of driving.
The gear range setting is highly dependent on the driving style. Let’s consider the most typical cases
This driving style involves driving long enough distances, and the road conditions are, to put it mildly, 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.
How to remove sprockets from the rear wheel of a bicycle?
If it’s a ratchet, then things will be a little easier. If there is special equipment, then even a person can cope with this, and not having anything to do with bicycles.
This requires only 2 tools:
- Special puller;
- Adjustable wrench.
First, of course, you need to remove the wheel. Then the stars are removed using two steps. It is necessary to insert the puller into the ratchet, and then try to turn it counterclockwise with a key.
If the mechanism has never been removed, then it can twist strongly (such is its property) and NOT succumb even under great efforts. Then you need to spray the miraculous WD-40 spray there from the thread side. If you leave it like this for a few hours, then the ratchet can be easily removed. It should also be remembered that the larger the lever, the greater the effort. Therefore, you need to take the largest adjustable wrench. Do a couple of jerks and the ratchet will unscrew easily.
You will need another tool to remove the cassette. It’s called a whip. This is the handle to which a piece of bicycle chain is attached. If the cassette is turned counterclockwise, it will start to rotate. This is where this whip will come in handy, which will hold her. Some craftsmen simply use a piece of an old chain instead of this tool. Then everything is the same as when removing the ratchet.
How to remove sprockets from the rear wheel of a bicycle: Step by step instructions
With active riding, the bike gradually wears out. To avoid this, you must constantly look after him. One of the most vulnerable spots in high-speed bikes is the rear of the drivetrain. Therefore, sometimes it requires replacement. How to remove sprockets from the rear wheel of a bicycle?
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 ratchets and cassette. Although they are similar in appearance, they are very different inside.
The freewheel is installed in the ratchet together with the sprocket. This is such a monolithic system that is simply screwed onto the bushings. 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.
To remove them, you need different pullers. It is important not to confuse them with each other, because they are NOT interchangeable. They have different slots. If you are still afraid NOT to distinguish a ratchet from a cassette, a photo will be an excellent tip in this matter.
Why is it needed?
The most common problem is chain wear. If it is NOT replaced in time, it will begin to bore stars. Everyone has their own favorite show that they use the most. Over time, the chain on it will begin to spin if a heavy load is applied. Therefore, you need to learn how to remove sprockets from the rear wheel of a bicycle. As soon as such a skill is acquired, you can fix any breakdowns yourself. And this will save you a lot of money on maintenance in the workshop.
Why is this necessary? You can remove the sprockets from the rear wheel of your bike for both regular lubrication and a complete replacement. They will also interfere if you need to replace the spokes on the right side or get to the hub itself.
How to remove sprockets from the rear wheel of a bicycle without a puller?
For such an operation, you do not need to purchase a special tool. True, it is much easier to handle him. In order to remove the ratchet without a puller, you will need:
- Gas wrench;
The ratchet has 2 recesses. You need to insert a center punch there and hit it with a hammer. You need to direct it clockwise. You can use a large nail instead. You have to be careful, as there are bearings under this place. With a little effort, you can screw the stars.
There is still the inside of the ratchet here. It is removed with a gas wrench, which is twisted counterclockwise.