How to remove the bottom bracket on a stealth bike

Assembling and installing a bicycle carriage

An important point when assembling the carriage is that the cups are correctly positioned. It is worth remembering that the left cup has a right-hand thread, and the right one has a left-hand thread.

At the end of the process, the connecting rods are installed in their places and fixed with screws.


As you know, there are only a few types of bicycle carriages. cartridge and integrated. Both types consist of industrial bearings, which are connected to the shaft and connecting rods using a spline connection. In fact, the cartridge carriage cannot be disassembled, but if it is integrated, then it is quite amenable to such manipulations.

When disassembling, you will stumble upon two completely identical cups, which contain industrial bearings. Pay attention immediately to their location. After cleaning and lubricating the two cups and carriage tube, they must be reinstalled where they were. Typically, the first cause of breakage is improper thread placement.

Tools with which you can service the carriage:

  • screwdriver;
  • puller for mechanisms;
  • special wrench for squeezing the connecting rods;
  • slotted wrenches;
  • set of wrenches.
remove, bottom, bracket, stealth, bike

Before starting to remove the mechanism, you must secure the bike so that it is stationary. After that, you need to pull off the plugs that are on the connecting rod itself, unscrew the fixing bolt, get the connecting rod and release the axle.

Repairing the carriage of a Stealth bike is quite simple. If it is cartridge, then it cannot be repaired, it is best to change it to an integrated one. In this case, the carriage can be serviced for a long time.

Bicycle cassette

The cassette consists of several pairs of stars that are attached to the hub, namely the drum itself. Often, the cassette contains 7 gears that are installed on the spider. But on some bikes, like hybrids, there can be 8 to 11 stars, which greatly increases the acceleration of the bike.

Do-it-yourself Stealth bike cassette repair consists in timely cleaning of each star from dust and plaque, as well as monthly lubrication of parts. You can clean the sprockets with a toothbrush, as it will help you get to hard-to-reach places. As for the lubricant, do not use grease, petroleum jelly or any other similar product. The most optimal substance for these purposes is ordinary engine oil (transmission or motor). If finances allow, you can purchase a special solvent for cleaning stars.

Open carriage service:

  • The condition of the bearings in the carriage cup is checked: both the bearings and their seats are wiped with a clean cloth from the remnants of old grease.
  • The carriage thread is washed with kerosene, gasoline or WD-40 and wiped off with a dry cloth.
  • Seats are lubricated with a small amount of grease.
  • Bearings are put in, and some more grease is added. If necessary, old bearings must be replaced.

Closed carriage

How to disassemble the carriage

Place the bike in a comfortable position so that in case of something it does not fall. The fact is that removing the carriage requires some effort, and the instability of the structure can greatly interfere with this.

Move the bike chain to the smallest drive sprocket, then remove it. There are two holes on the boot, into which insert the appropriate tool, and then unscrew the part from the connecting rod. Under the boot you will see a hollow bolt that unscrews the hexagons by 10, while holding the pedals.

Pull out the washer that is located under the bolt and remove the inner screw of the puller completely. Unscrew the puller from the connecting rod and remove the latter from the carriage. Repeat the same operation for the second axis.

Take the special wrench and unscrew the right-hand locking nut located on the left side of the carriage. In this case, you must make some effort, but do not overdo it so as not to rip off the key and damage the part. Some bike designs do not have this nut.

Insert the slotted wrench for the carriage into the slot. Use an adjustable wrench to unscrew the left adapter cup, which has a right-hand thread, from the frame. When doing this, use tools with long handles to make it easier to turn and apply force. Remove the left cup with the bearing.

Go to the right side of the bike where the sprockets are located. Using a similar technique, unscrew the right bowl from the frame, which has a left-hand thread. Make an effort if necessary.

Remove the cartridge or the right axle cup from the bike structure. This will remove the carriage. Clean it from the system of grease with a cloth, then rinse all parts in a solvent, for example, in kerosene. Once dry, lubricate the bottom bracket and put it back on the bike.

Open carriage

The latter, in turn, are screwed directly into the bottom bracket of the bicycle frame. This type of carriage is serviceable and can be easily removed, lubricated, sorted out and reassembled. If necessary, it can also be replaced with a new one.

Maintenance of a bicycle carriage means disassembly, lubrication of its parts, installation and adjustment.

Troubleshooting: maintenance, cleaning, replacement

Dismantled the carriage, pulled it out of the frame and what do we see? The condition of the bottom bracket depends on how much dirt gets into it and how much the bearings are worn out. Sometimes the bearings simply shatter and require a complete replacement. This often happens if the carriage assembly has been in operation for more than three to five years.

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First, all parts must be checked for defects. This primarily applies to bearings. Then we inspect the carriages, cups with latches. If any component has visible damage, then you need to change it to a new one. The rest of the parts are cleaned in a solvent. The most difficult thing will be to clean the bearings: dirt is very firmly adhered between the balls.

The space inside the carriage glass is cleaned with a rag. It is better to sprinkle fine dirt with a lubricating spray (WD-40, for example) and wipe the walls with a soft dry cloth.

Fault definition

The fact that the carriage has become “buggy” can be found only when you rotate the pedals. Visually, knot problems are difficult to identify, so it is best to prick up your ears and move your attention to the area of ​​the bottom of the frame. You should not listen too much, especially if you are driving on a busy road. However, if the state of the carriage is not good, it will “scream” about itself without delay.

How To Remove A Stuck Bottom Bracket Cup. Some Smart Soultions. BB Removal. Bicycle

A faulty bottom bracket will prevent you from cycling quickly. Blocked dirt, worn bearings and lack of lubrication will continually impede movement. All this is accompanied by an unpleasant creak and a characteristic knock from below. Also, the assembly may start to play (broken bearings and axle misalignment).

You can finally check whether it is really worth disassembling the carriage using the “standing ride” method. To do this, you need to accelerate a little, get up from the seat and twist the pedals. When the carriage mechanism is jammed, the sounds and deterioration of the pedal travel will only increase.

Bicycle bottom bracket: what is it and why?

The carriage is a unit located in the middle of the frame, placed in a special cavity. a glass. Where to look? It’s simple: it is hidden where the cranks with pedals and stars are located. The main function of the bottom bracket is to connect the crankset to the frame of the bike and provide torque when pedaling.

A quite reasonable question may arise: what, without this device, you can not do at all? There is no bicycle without a carriage. If such a person is still caught, it means that he is not in use now.

Depending on the bike model, carriages differ in size and maintainability. The most common are 68mm knots, but other diameters can also be found. Carriage shaft length range: 110mm, 113mm and 122.5mm.

  • cartridge (disposable);
  • collapsible to be repaired.

The first type includes carriages that are installed in the frame and cannot be disassembled. Obviously, the service life of such a mechanism is equal to the time of complete wear of the bearings or axle. Full sealing of the unit allows you to operate it for a long time even in extreme conditions, not to mention measured driving.

Collapsible mechanisms will require periodic inspection and maintenance from the owner. The latter consists in replacing worn bearings and lubricating the entire assembly. We will just talk about them further: how to remove the carriage, eliminate the malfunction and reassemble the assembly.

How to disassemble and remove the bicycle carriage yourself

Perhaps lovers of simple periodic bike reels are not familiar with this term, but those who often use a bicycle as a vehicle, and even more so, professionals in the field of cycling, are aware of what a bottom bracket mechanism is.

Like any mechanism, this part over time is exposed to external influences, wears out or completely becomes unusable, which requires maintenance, full or partial replacement. In any case, you first need to remove the carriage, establish the suitability of the part, and then decide whether to repair it or replace it with a new one.

Removing the carriage: doing it right!

It makes perfect sense to first remove the assembly from the bike frame to fix the problem. To be precise, take it out of the glass. Just about how to do it yourself, and the conversation will go.

So, before proceeding with the removal procedure, you will need a set of tools:

  • Connecting rod squeeze.
  • Wrench. If the size of the nut is unknown, then an adjustable wrench will go.
  • Flat screwdriver.
  • Small hammer.
  • Carriage puller for removing from the glass.

Before proceeding with disassembly, all space around the carriage should be cleaned. A damp cloth removes all dirt and dust from the frame, bottom bracket area and connecting rods. This will be enough so that excess dirt does not get inside during parsing. But it will be better if you wash the whole bike. Cleanliness is the best repair assistant. Proven!

Plugs are removed from the connecting rods. Basically, these are plastic covers that can be easily pry off with a screwdriver and can also be easily inserted back. Next, you need to unscrew the nuts securing the connecting rods to the carriage. A squeeze will help in this matter: we put it on a nut, then we take the key and unscrew it. Depending on the type of thread, the direction of loosening and tightening the nuts may vary. There is an option where the thread is right on the left side (counterclockwise. loosening), and on the right side. left (counterclockwise. tightening). Maybe only right-hand thread on both sides, it will be easy to figure it out.

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The next step is to remove the connecting rods. The squeeze is inserted at the other end and twisted into the connecting rod. The squeeze bolt is forcibly screwed into the connecting rod, as a result of which it gradually comes off the axis. It is recommended to start removal from the side where there are no transmission stars.

The bicycle carriage is held in place by means of special cups fixed with rings. A screwdriver is attached to the ring so that its end points to the left. By lightly tapping the hammer on the screwdriver, the ring smoothly turns to the left and jumps off. Similarly, by turning to the left, using the percussion method, the cup is also removed.

So, finally we got to the bottom bracket bearings. These small parts can be removed with the same screwdriver: pry, and they will pop out.

And, finally, a removable device pulls out the carriage shaft from the glass. a rotating part that plays a major role in the mobility of the bicycle cranks.

Carriage Lubrication and Assembly

Using a screwdriver, the walls of the glass are processed. Apply the product in an even thin layer. No need to put grease inside the mountain. This is useless. Then grease is applied to the bearing, which is inserted from the side of the stars. The flat bezel should face outward. Then you need to lubricate the carriage shaft and insert it so that the long end is on the transmission side. In general, the carriage is assembled in the reverse order.

The bearing on the other side is inserted in reverse, with a frame into the glass. The cups are lubricated from the inside, and then put on. It is necessary to tighten until the axial play is completely eliminated. In this case, the rotation of the shaft should be slightly constrained. As soon as the fastening rings are mounted, the cup will move slightly and the axle will rotate freely.

It remains to collect the connecting rods. The most important thing here is to put them on so that when pedaling, God forbid, they do not fall off. Procedure for Efficient Connecting Rod Assembly:

  • The square is lubricated with a small amount of grease, this will help to push it deeper onto the axle.
  • Processing a screw with a thread lock.
  • Tighten the connecting rod nut with maximum effort until it stops. You can even lengthen the wrench. the thread will not break.
  • Insert plugs.

A bicycle is an extremely unstable unit, therefore, during any repair work, it must be carefully fixed. The frame will not wiggle back and forth, which eliminates the risk of the bike falling to your feet or hands.

The carriage is assembled and ready for use. In general, the procedure is simple even for the first time, and in the future it will not be difficult to disassemble and install the mechanism at all.

How to remove the bottom bracket from a bike without a puller?

Despite the fact that a bicycle is a simple structure from a technical point of view, it still needs to be checked and carried out technical equipment and all kinds of maintenance. With the help of these procedures, you can greatly extend the life of your device. In addition, if you follow all the rules and more often look closely at the condition of the bike, then you can warn it against significant types of repairs, which are also quite expensive.

It is worth noting the fact that there is absolutely no need for minor repairs or inspection of the bike to contact service centers. In this article, we will tell you how to remove the carriage from the bike, due to which you can save on service centers. Consider all the direct nuances of this process and other things that you will definitely need.

Puller Features

Before you know how to remove the carriage from a mountain bike, you need to learn about the puller tool. It must be selected taking into account the appearance and structure of the carriage itself. Often the manufacturer of the carriage must match the manufacturer of the puller. Today, there are universal types of puller in the world, but, unfortunately, they may not be suitable for one or another mechanism. This mechanism is perfect for removing so-called carriage cups. This is precisely the main feature of the mechanism. Therefore, when using such a device, you should be extremely careful and attentive.

And how to remove the carriage from a bicycle without a puller?

Characteristic qualities of this type of repair

Every bicycle owner should know how to remove the carriage from a bicycle. It is worth noting that if the manufacturers of your bike have installed such a closed-type mechanism in it, then there is no point in repairing it. Such devices, as a rule, are disposable and the best way out of this situation is to replace the old unit with a new one.

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In the same case, if your mechanism is open type, then everything is somewhat different. It can be easily removed, repaired and reinstalled. Bicycle repair experts say the bottom bracket is a fairly simple mechanism that can be easily repaired.

When carrying out repairs, it is necessary to do a number of actions:

  • It is necessary to lubricate all parts that are present in the mechanism.
  • Backlash must be eliminated.
  • If there are any sounds when driving, then they should be eliminated.

Carriage Removal Process for a Newbie

Undoubtedly, it is always difficult for a beginner in this or that business. But if there is a certain desire to do something with your own hands, then you need to learn and do. We present you with a description of how to remove the carriage from a bicycle with your own hands.

Doing so-called maintenance of your own vehicle is better than trusting it to a stranger. After all, you will clearly know what works great in your device and what needs to be eliminated. If you have the necessary tools for various work with the bike, then you can carry out a number of actions yourself.

In order to remove the carriage from the bike, as well as remove the pedals from the bike carriage, you need to prepare in advance a number of tools that will be at your fingertips. These tools include:

  • a wrench for nuts or an adjustable character;
  • for connecting rods, a special squeeze is required;
  • flat-type screwdriver;
  • hammer, but small;
  • a tool that allows you to remove the carriage itself.

On a device such as a bicycle, the carriage is a bearing assembly. The main essence of such a mechanism is to connect the connecting rod to the frame. In addition, a product such as a carriage provides so-called torque to the connecting rods. Based on this, it can be understood that such a detail is very important on a bicycle, its condition affects a lot.

The design of modern bicycles implies a special glass for such a material as a carriage. This glass can be found in a specific area of ​​the rear pipe. As a rule, manufacturers install a carriage cup in the area of ​​the rear stays. Due to the fact that the device is installed in such a vulnerable area of ​​the bicycle, its durability is poor. From this it turns out that there is a need to check the device and repair it from time to time.

It is negatively affected by dirt, dust and rain. For this reason, backlash is formed. If you do not clean it in time and prevent damage to this product, then this threatens with a lot of negative nuances. During movement, you may encounter a decrease in potential speed or jamming of the device.

Therefore, advice on how to remove the carriage from the bike is quite relevant.

How To Remove A Stuck Bottom Bracket From Your Bike | GCN Tech Monday Maintenance

Convenient instructions for removing this carriage

A lot of people are wondering how to remove the bottom bracket from a bicycle without a puller. The question is quite interesting, but first, let’s look at the instructions for the standard process. It is important to remember that the design of this product contains small bearings, which often crumble. Therefore, you must understand that it is necessary to carry out the removal and repair with accuracy and care.

Carriage difference

How to remove the bottom bracket on a speed bike is a separate topic. This is justified by the fact that on such a vehicle, this device has a slightly different form.

On other bicycles where the bottom bracket is of the standard type, it should be externally checked. If it is disassembled, then that is good. But before starting this procedure, you should pay attention to the condition of its bearings. In order to clean the carriage itself and especially its threads, it is necessary to use gasoline. It is important to remember that such devices need regular cleaning, this is necessary for your safe driving.

Putting the material in its place

After cleaning the material, the work does not end. The carriage must be attached and reinstalled. This process also brings with it a number of complications, which involve placing the cups in place. After installation, the device must be lubricated. That’s it, now you know how to remove the carriage from the bike.