How To Disassemble A Sprocket On A Speed Bike

Campag bushings old and new styles.

On newer Mirage / Veloce hubs, the left lock nut may be unscrewed first. If this happens, then pull out the freewheel mechanism to the right side with a sharp jerk. Do all this carefully over the rag so that small parts such as springs and dogs fall on it. There are currently two types of springs in use: Multi-coil and Single-coil. The former is used in older Hope hubs as well as old and new Campagnolo, the latter in newer Hope, Campag, Shimano and a variety of other lightweight hubs. When disassembling, pay attention to the sequence of operations, as well as special attention to the orientation and location, in particular the side on which the drive ring is installed and the location of the dogs.

How to disassemble a sprocket on a speed bike. 9. Tighten the cassette retaining ring.

Make sure the retaining ring is screwed on correctly, it can easily be screwed up skewed, especially if it is an aluminum alloy. If something is wrong, unscrew it and screw it on again. Tightening torque is best set to 40Nm (approximately 30ft-lbf). Use a 12 “long wrench with slightly less force than the axle nut. For a single speed chain, tighten the wheel nuts to hold the wheel (do not tighten at all) and check the chain tension in the most “protruding places” (the fact is that there are certain tolerances on the geometry of round parts, which may be slightly NOT round, as a result of the chain tension will change slightly as the wheel rotates). Slowly pedaling backwards and find the position where the chain slacks the least and in this position finally tighten the wheel nuts. Tightening the chain in the position where the cranks are at the lowest tension will increase all system noise.

How To Disassemble A Sprocket On A Speed Bike

How to disassemble and lubricate the cassette hub

Water and dirt can easily get inside the cassette hub and if this happens, your bike will clang and screech like an old elevator.

To disassemble and clean the bushing, you need special tools and a little additional knowledge on how to do it correctly. In this guide, we will walk you through and show the entire process step by step. But if you doubt the correctness of your actions, especially in the third step, it is better to entrust this to a specialist.

Rinse the fillings twice.

Put on your safety goggles, take a can of GT85 or WD-40 and spray a continuous layer on the inside of the freewheel hub. Then pour plenty of machine oil over the parts, let it drain, wipe dry and repeat the operation. Then install the gasket, fry the joint and put the freewheel back in place.

We remove the cassette.

Remove the rear wheel and fix the cassette with the “whip”. Turn the “whip” around the third star clockwise or larger (so that the longest piece of whip is wound around the star). Insert the circlip remover and wrench so that its key handle is to the left of the whip handle, but close enough to be grasped with both hands at the same time. Now squeeze and unscrew the retaining ring and cassette firmly. The distance between the snap ring and the locknut on the axle may not be sufficient to accommodate tools Some manufacturers, but Shimano or Park pullers always work.

Change the sprocket on the rear cassette

The set of transmission stars of the rear wheel is many times superior to the front one. The standard kit includes eight components, and in high-speed models (or for a large sports area) there are 9 or 11.

It is worth mentioning right away that a cassette or ratchet may belong to the back. The cassette is a modern version with an internal slotted mount on the bushings. Ratchets, as an outdated option, can only be found on a budget high-speed bike. The set usually includes 5-7 gears. External mount, threaded, removable tool different from Cassette.

The fundamental difference from the cassette is its integrity. it is impossible to change the star separately for 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.

Sequence of work:
1. Remove the rear wheel with a 15 wrench, with an eccentric mount everything is simple. we open the lever and loosen the fixing nut.

2. The next step is to unscrew the axle nuts. You will need a 17 key for it. To roll off the mount from the rotating wasp, we put on an additional nut to fix the axis.

3. Unscrew the bearing cone and pull out the bearing from the opposite side.

4. Remove here with a cone and bearing. In bushing components: if necessary, they can be immediately replaced with new ones.

5. Insert the cassette remover into the slots.

6. Place the whip on the largest (lowest) star. We will rotate it clockwise.

7. 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, with heavy wear, when half of the cassette is worn off, it makes no sense to change them individually. Difficulties can also arise if the largest sprocket has been erased, on which all the others are usually attached.

Is it possible to dismantle the cassette without a puller and a whip? In principle, this can be done with a slotted tube and a spanner. You can make a whip yourself, welded a piece of an old chain to the metal handle of the knife.

When replacing SEPARATE stars, especially the middle ones, disassemble the cassette carefully so as not to lose all spacer and fixing washers. Everything is easier with a spider cassette. you don’t need to disassemble it, the star is removed separately from its mount.

Rear transmission assembly:

Check the transmission and adjust the rear derailleur. Timely replacement of sprockets will save you from unpleasant surprises on trips and will generally increase the resource of the bicycle transmission.

Campag bushings.

The new Campagnolo Centaur, Chorus and Record hubs take a second apart. Fix here on the left side with a 5 mm socket wrench. Then, using a 17mm open-end wrench, turn the lock nut on the right side clockwise and unscrew it. In order to remove the freewheel mechanism, it must be pulled, while it remains inside. The ratchet pawls and their springs will remain in place. Removing the Mirage and Veloce bushings, as well as the old style Chorus and Record bushings, may require you to first loosen the small socket head cap screw (about 2mm) located in the right locknut. On newer versions, it is no longer there, so remove the lock nut with a 17 mm wrench holding it here with a 5mm socket wrench or a second 17mm wrench.

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Remove the ratchet mechanism of the freewheel sleeve.

To get to the insides of the freewheel bushing and replace the old grease or simply replace it with a new bushing, you need to remove it. Insert a 10mm socket wrench into the hollow bolt holding the freewheel on the right side and turn counterclockwise with a fair amount of force to loosen the bolt. You may need to use a small extension on the wrench handle to make it easier to slide the bolt out of place. Hubs that are similar to those produced by Shimano, such as those from Joy Tech, can be removed a little differently. The retaining bolt in these usually needs to be unscrewed from the left side, inside the hub mechanism, using a thicker socket wrench.

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.

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 its SEPARATE parts. This is especially true of 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.

Required set of tools

Before starting the replacement process, acquire the necessary tools that may be useful to you. It:

  • Whip
  • Cassette removers
  • Rozhkova and adjustable wrenches

How to properly disassemble a cassette?

First, remove the rear wheel from the bike. This is very easy to do. Unscrew the nut with a wrench and release the chain. The owner of mountain models will simply press on the special mount and the wheel will be dismantled.
Next, install the removable device on the slotted nut of the cassette. Here we need a whip, which will prevent the cassette from turning. While we rotate the puller with an adjustable wrench, hold the whip to the largest star.

The process of dismantling and replacing the sprocket

Using the nut, unscrew the cassette and remove it from the wheel. We carefully examine the stars and determine which of them 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 are removing the used parts from it and replacing 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.
On some bikes, you may find so-called “spiders” in the configuration. This is a group of several stars, which 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.

What You Should Know in Singlespeed?

If you own a single speed bike, the process of replacing the rear chainring will be simplified to a minimum. You just need to unclamp the circlip. If the original 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 force manipulations. Therefore, if you are talking about a single-speed bike, everything is very easy and understandable here. However, Owners of such models should carry out the process of dismantling the cassette only if one or more of the Largest sprockets 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 promptly replace worn-out parts. A working bike is the main guarantee of your safety and a cool, trouble-free ride!

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 the biggest sprocket is likely to 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 on 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.

2.Remove the right connecting rod fixing axle bolt with a hexagon.

3. Unscrew the pedal from the right crank arm. A standard open-end wrench is suitable for this.

4. Insert the puller into the connecting rod to remove it from the carriage. First, we screw the tool all the way into the thread. It is important that it sit evenly on the shaft, otherwise it can be damaged when unscrewing the connecting rod. Install the spanner wrench on the puller and screw it in until it stops until the connecting rod is not pushed out of the carriage shaft.

5. Carefully remove the system from the chain.

6. Two stars are usually attached to each other on the so-called spider. The big one remains on the connecting rod itself. Unscrew with hex bolts.

This is how the system understands.
Replacement and installation 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 middle and small stars 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.
  • Gently put the chain on the system and screw the connecting rod by rotating the puller in the opposite direction.
  • Tighten the fixing nuts and put the plugs.
  • Probably the pedal on the connecting rod.
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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 listed tools are required. The connecting rod is a delicate thing, and a hammer and chisel is not the best option for removing it. Same goes for keys. Pliers are difficult to replace them, besides 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. everything is in order and does NOT require adjustment of the speed switch.

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 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.

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 remove a 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. Moreover, there are 2 such methods and both will “work” 100%:

Be sure to prepare an area with a level surface that 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. Necessary Pay attention to the correct installation of this tool: its splines must completely enter the grooves of the retaining ring.
  • The “whip” key is taken into the hands, put on the sprocket in such a way that the fragment of the bicycle chain on the key is on the sprocket teeth. We draw your attention to the fact that the handle “whip” should be in the case here 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, movements / scrolling of the sprocket are blocked.
    Note:In some cases, the chain may jump off during this process, which means a strong wear of the cassette sprockets or breakage of the “whip” key. Experts recommend putting a “whip” over 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 located in a 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 service of a two-wheeled vehicle.

How to disassemble a sprocket on a speed 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.

Change the sprocket on the rear cassette

The set of transmission stars of the rear wheel is many times superior to the front one. The standard kit includes eight components, and in high-speed models (or for a large sports area) there are 9 or 11.

It is worth mentioning right away that a cassette or ratchet may belong to the back. The cassette is a modern version with an internal slotted mount on the bushings. Ratchets, as an outdated option, can only be found on a budget high-speed bike. The set usually includes 5-7 gears. External mount, threaded, removable tool different from Cassette.

The fundamental difference from the cassette is its integrity. it is impossible to change the star separately for the ratchet. Here, either all at once, or nothing at all. Therefore, we will consider how to install a new sprocket on the cassette.

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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 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. we open the lever and loosen the fixing nut.

2. The next step is to unscrew the axle nuts. You will need a 17 key for it. To roll off the mount from the rotating wasp, we put on an additional nut to fix the axis.

3. Unscrew the bearing cone and pull out the bearing from the opposite side.

4. Remove here with a cone and bearing. In bushing components: if necessary, they can be immediately replaced with new ones.

5. Insert the cassette remover into the slots.

6. Place the whip on the largest (lowest) star. We will rotate it clockwise.

7. 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, with heavy wear, when half of the cassette is worn off, it makes no sense to change them individually. Difficulties can also arise if the largest sprocket has been erased, on which all the others are usually attached.

Is it possible to dismantle the cassette without a puller and a whip? In principle, this can be done with a slotted tube and a spanner. You can make a whip yourself, welded a piece of an old chain to the metal handle of the knife.

When replacing SEPARATE stars, especially the middle ones, disassemble the cassette carefully so as not to lose all spacer and fixing washers. Everything is easier with a spider cassette. you don’t need to disassemble it, 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, it is necessary to align the drum 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 it from the side of the cassette, then the bearing and the cone on the left side, fix it with nuts.
  • Put on the chain and put the rear wheel.

Check the transmission and adjust the rear derailleur. Timely replacement of sprockets will save you from unpleasant surprises on trips and will generally increase the resource of the bicycle transmission.

How to replace chainrings on a bike?

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 the “four shoes” used in Shimano’s newest 11 speed hitch, for which sprockets of various sizes are available without worrying about the difference in PDZ.

Tools for work

  • Hexagons or special Torx keys (asterisks)
  • Carriage puller;
  • Special wrench puller.

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.

Replacing the sprockets is essential for correct 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 expensive, in some situations it exceeds the cost of the bike itself.

Cycling 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.

Asterisk options:

  • 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;
  • Several Spider. 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 In Road Bikes.

Required tools

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

  • Puller, which is suitable for slotted concept and for retaining rings;
  • Whip. a metal key, consisting of 10-20 links;
  • Adjustable wrench.

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 modern 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.

Immediately focus on the ratchet. Changing the rear chainring 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, there are options up to 11 pieces, depending on the bike model.

Ratchet and cassette elements

So how do you change the rear sprocket on a speed bike? Consider the algorithm of actions.

  • I took a bicycle key for the rear wheel, dismantle it. We sequentially unclench the levers and weaken the fixation of the nut.
  • Now it is the turn for the axle nuts. Using the second key, we turn off the mount.
  • The next stage involves unscrewing the bearings of the cone and pulling it out.
  • We take out here with all the elements.

Sleeve recessing process.

  • 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.

The preliminary stage is over. Such simple actions are possible in ordinary home conditions. We emphasize that if the wear is not one star, 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 you DO NOT search throughout the room

How to replace front sprockets.