Varieties of rear bicycle hubs, how they differ from each other
The division of the rear hubs into varieties allows them to be classified according to the possibility of braking and stopping the bike. Depending on their design, the rear hubs are divided into:
- Without brake.
- With built-in brakes.
Conversely, bushings that do not have a braking mechanism also fall into two categories:
- No freewheel.
- Free running.
The bushings, which have a built-in foot brake mechanism, are structurally made according to the second category. The main feature of the hub with a brake mechanism is that at the moment of braking and stopping the vehicle, press the pedals in the opposite direction.
The bushings are fixed to the frame with two nuts. This method is inexpensive. The second mounting option is with the help of an eccentric, which is much more expensive, but more convenient. So the nuts do not need to be unscrewed with a wrench; to remove the eccentric wheel, you just need to squeeze its handle. Removal procedure takes only a few seconds.
The bushing material is of great importance for efficient operation. Bushings are:
- Aluminum. They are not subject to decay, corrosion, lightweight, comfortable.
- Steel. Extremely strong, but heavy, corrosive.
The hubs also vary in size. The standards regulate several dimensions. from 9 mm to 15 mm. The weight of the bushing is the greater, the larger its section.
Most often, the repair of the rear wheel hub is necessary either with backlash or when tightening the cone. So, step by step instructions:
- Clear the place of operations from all unnecessary items, things, unnecessary tools.
- Loosen the lock nut with a key.
- Loosen or tighten the cone nut.
- Tighten the locknut in its original place.
Bicycle rear hub and its device
The wheel has long been ranked among the most important units. It usually experiences more stress from the back than from the front. Why? Yes, because it is equipped with a ratchet and an additional cassette.
During movement, the main emphasis is carried out on it. Competent repair, maintenance of the rear wheel is possible only after familiarization with the device and the functional purpose of its hub.
A hub is a wheel component that attaches to the bike frame, specifically drop points. It is located in the very center of the wheel and provides free rotation for it. Sleeve composition:
Instructions on how to lubricate the rear bicycle hub
The bicycle is recognized worldwide as the most healthy, lightweight and practical means of transportation. But its owner should definitely learn how to eliminate at least elementary malfunctions, especially if you are traveling on a difficult and long cycle route. Otherwise, your two-wheeled friend will cost you a tidy sum.
You can master shallow recovery with patience and observation. These qualities are extremely necessary when disassembling units, lubricating, replacing worn parts. Often you have to service the wheels along with the rear hubs.
How to Grease Bike Wheel Bearings
How to Assemble the Rear Bicycle Hub?
After lubricating every part, reassemble the bushing. For correct assembly, the following professional recommendations should be strictly adhered to:
- The axle is exposed in such a position that it is impossible to confuse its right side, which is tightly tightened. Adjust the axle using its left taper.
- Push the left cone onto the axle until it stops.
- Put on washers.
- Tighten the lock nut.
- Adjust the bearings.
If the cause of the breakdown was a malfunction or breakdown of any part, then you should simply replace it using the following recommendations:
- After removing the workplace, dismantle the retaining ring.
- We take out the hub axle. Disconnect the elements located on the side opposite to the asterisks first.
- We check the condition of every detail.
- We carry out replacement of worn out parts.
- Assembling the assembly, tightening the flare nuts and locknut.
When to service the rear hub
Trouble-free operation of wheels, 100% serviceability of critical parts of the machine are possible only if they are maintained in proper condition. Lubricate the rear hub of the bike regularly as it visually dries. The spokes and rim must be tightened periodically. Bearing balls should also be changed, brake pads should be adjusted as often as possible.
The rear hub just needs to be serviced regularly. If this is not done, very soon a complex and expensive repair of the entire wheel will be required. It’s better to take care of your vehicle right away for the long term. The rear hub does not require much more effort to service than the front.
It must be serviced in the following situations:
- The body makes noise when rocking or while driving.
- Bearing crunch.
- Roll-forward dynamics is insufficient.
It is dangerous to ignore these signs. In the future, the bicycle disease will worsen. Very soon, the whole car would just crumble. A complete renovation will cost much more.
It is best to service the wheels regularly, especially since it is easy to do it yourself. In the spring, when the cycling season is just beginning, they should be checked for play. All bearings must not be over-tightened.
Cleaning and lubrication
It is necessary to clean the balls and cups in contact with them, cone-nuts, axle. In a sleeve with good dust protection, the lubricant is usually clean, so cleaning can be carried out without chemicals. with an ordinary clean rag. If dirt is present, use one of the degresers we have recommended for cleaning the chain in the material, how to clean old bicycle chain grease at home.
How to apply lubricant
The goal is to lubricate balls, cones and cups. This can be done as quickly and efficiently as possible using the following technology:
- Lubricate the cup with your finger.
- Put the balls into the cup using medical tweezers, observing the intended purpose of the groups sorted during disassembly.
- Apply a thin layer of lubricant over the balls.
- Repeat steps 1-3 for the second side.
- Put the boot on the locked cone located on the side of the cassette (only relevant for the rear bushings).
- Apply a thin layer of grease to the beveled surface of both cone nuts.
There should not be a lot of lubricant at the contact points. This statement is relevant only because excess grease is squeezed out through the anthers, and it intensively begins to collect dust. You can estimate the sufficient filling level from the photo. There are usually no problems with the installation of balls. They adhere well to the lubricant, which is already in the cup according to paragraph 1 of the technological instructions.
It is customary to lightly coat the thread on the axle and the ends of the nuts with a compound that was used to treat rubbing surfaces. This activity is designed to minimize oxidation of metals and the formation of rust at the interface of detachable parts.
How to properly lubricate a mountain bike?
A bicycle is one of such human mechanical inventions, in which there are elements that interact with each other by rolling some surfaces relative to others (wheel hubs, main carriage), by means of a chain transmission and by entering one smaller cylindrical surface into another. this is the damping mechanism front fork.
Despite the fact that bearings significantly reduce friction, proper lubrication of all these elements is necessary: friction is reduced, movement is easier. This increases the life of the parts. However, it is important to know how to lubricate your bike properly.
The better the bike, the better the factory lubricant, the longer it lasts. These mountain bike models include, for example, Merida, GT. For example, it is known that the 2009 GT Avalanche 2.0 can freely gain 10,000 km without any lubrication of the bushings and carriages, while there is no damage to the bearings. Of course, this does not mean that you should not give a damn about the maintenance of the bike.
In the event that you buy an “Auchan-bike”, it will be right to “open” all the units that need lubrication, check them and lubricate them again immediately after the purchase. Sometimes it is necessary to replace something immediately, for example, the rear bushing and bearings of the main carriage.
Probably it is not necessary to additionally indicate that only a thoroughly washed and, most importantly, dried bike should be lubricated.
So which parts of the bike need lubrication and how is it done?
The ride comfort depends on the regular lubrication of the bicycle chain. the chain does not buzz, it switches easily and freely. As a rule, the need for lubrication arises if the chain begins to rustle, rattle, and it is also difficult to shift gears. This can be felt after intensive driving in rain and muddy weather, after the chain is dry.
About the types of lubricants
Greases with an increased m of any element. such as lithium or calcium.
Lithium greased. such as “Litol-24”, it is good to lubricate the bearing axles, the carriage. It is lithium that gives the lubricant a specific slip, and it exhibits antifriction properties. In addition, lubricants with the addition of lithium do not thicken in frost to.50 degrees and do not liquefy even at midday temperature in the desert, since they are capable of not changing properties when heated to 150 degrees.
The negative side is a fairly high water solubility, therefore, the lubrication points must be sealed with sealed anthers. In addition, this lubricant is not recommended to be applied to aluminum surfaces.
Calcium greases are greases and work well for a long time. An example of such a lubricant is Uniol. Unlike lithium, they have high adhesion, or adhesion to the surface, and hold for a long time. In addition, they help to resist corrosion in wet conditions. These lubricants are yellow or greenish. It is very important that they do not react with aluminum, unlike lithium greases. Therefore, their price is high and they can be used to lubricate expensive bikes.
Aerosols are a special type of lubricant. which can contain several components, for example Teflon. Their advantage is the ability to penetrate into hidden cavities and hard-to-reach places, including due to adhesion and surface tension force. Their predecessor is kerosene, which has a truly unmatched enveloping ability, even able to get out of the vessel. With the help of such lubricants, it is possible to process cables, all types of threads, especially when loosening “heavy” and “stuck” connections. Examples of such lubricants are LM 40, LM 47 and others.
Perhaps the most famous “quick release” aerosol lubricant is the well-known WD-40. Among other things, it creates a hydrophobic layer and displaces water.
Lubricants with m silicone. They are easy to apply, able to “repel” dust and water.
Wax lubricants: on the chain, for example, the coating can last for several months under dry conditions. But the wax is subsequently able to “fall off” itself in the form of scales and flakes. If the bike is operated in water, mud, fords are crossed or riding occurs in spring or autumn, then you need to choose another lubricant, because the wax is not fluid and cannot effectively penetrate into the chain joints.
A bicycle is not an easy machine. Before you lubricate your bike, you need to know that, in addition to the places for lubrication, there are areas where lubrication is completely undesirable. These include wheel tires (accidental ingress of grease on large areas can lead to skidding and the impossibility of emergency braking), rims (in the case of using tick-type brakes), as well as brake discs and pads. In addition, if oil gets on the rubber chamber, it can begin to corrode the rubber, which will lead to its rupture for a considerable length.
How to properly disassemble, clean and lubricate the rear hub
Immediately remember one truth: any service is recommended to be carried out with a snagged sleeve. Otherwise, the chances of assembling the wheel correctly and quickly are unlikely to work. this can only be done by a person who is already experienced in servicing bicycles.
Step-by-step instructions for maintaining the rear bicycle hub:
- Remove the cassette from the axle using a whip and a puller.
- Opening the retaining ring.
- We remove all bearings and washers.
Note:the sleeve can be on industrial bearings and bulk bearings, but in any case, it is very important to remember their original location in the sleeve. This rule must be observed when removing the washers.
- We carry out a careful inspection of the bearings. if they are damaged, then this means the need to replace them with new parts.
- We take out the axle. it does not understand.
- We clean the body of the rear hub of the bicycle from dirt. All internal cavities must be wiped with a dry cloth.
- When installing back, each part is thoroughly lubricated, special attention should be paid to the bearings during this process.
- The last step is to install the stopper and tighten the fastening nut. It is not necessary to apply great efforts to tighten, as this can result in a problem of free wheel rotation.
Of course, everything looks quite easy and simple, but there are a lot of nuances in servicing the rear hub of a bicycle. they must be known and taken into account in the process of work:
- Firstly, the direct disassembly of the bushing should be started only after the cassette has been removed. over, the sleeve is disassembled from the opposite side and, as a rule, it is on the left. The locknut, if any, is unscrewed with a 15 mm wrench, then the stopper is removed (again, if any).
- Secondly, you need to be extremely careful when removing the washers and rings. they will need to be laid out on a pre-prepared sheet of paper in the exact order, if this moment is overlooked, the assembly of the rear bicycle hub after cleaning and lubricating it can turn into a real torment.
- Thirdly, after twisting the housing of the rear hub, its axis will begin to give in. just at this moment the bearings will appear. And again, you need to be extremely careful when removing the bearings. the parts are small and easy to lose. We remove each bearing with a knitting needle or tweezers, carefully wipe it with a rag soaked in kerosene or gasoline, and put it aside. Just in the process of wiping, the bearings must be carefully inspected for damage, and if there are any, then the part must be replaced.
Note: in the articles and instructions for servicing the rear hub of a bicycle, you can find a recommendation to use acetone to wipe bearings. this is permissible, but it should be borne in mind that the aroma from such a product will not be the most pleasant, and acetone can corrode the skin on the fingers. And one more thing. many “kulibins” in order not to lose small bearings use a magnet. in no case should this be done! The fact is that the bearing is magnetized and during the operation of the bicycle, iron dust is attracted to these small parts. the fact that the hub will soon become unusable can be predicted with confidence.
It is highly undesirable to confuse the left and right parts when disassembling / assembling the rear hub of a bicycle. this can lead to wheel play. If at least one ball is lost, then you will have to carry out a full replacement of the bearings. Sometimes, when opening the bushing near the axle, you can observe iron “dust”. this means that the bearings are completely worn out, they must be completely replaced.
Causes of malfunctions
There can be a lot of reasons for bike wheel breakage. A short list of situations in which a malfunction may occur:
- Bushings were not regularly serviced.
- Excessive play.
- Poor bushing elements.
- Strong wear.
- High tightening torque of the cone.
For long-term trouble-free operation of the bike, you must pay maximum attention to it. Maintenance every day, after each trip, regular inspection of all units and mechanisms will significantly extend the life of your two-wheeled friend. And then all open spaces will obey you. Drive with pleasure!
How to lubricate a bicycle chain
In addition to lubrication, you need to monitor the “mileage” of the chain. On average, it needs to be replaced after every 1500. 2000 km for the following reasons:
How To Service Shimano Ball Bearing Hubs. Service A Shimano Hub
- it starts to sag;
- fuzzy gear shifting;
- the extended chain damages the cassette sprockets on the rear wheel.
The question often arises as to how often to lubricate the chain.?
There are no uniform standards. It all depends on the feelings of the bike owner:
- if resistance or crunch appears in the circuit;
- after driving through dust and sand;
- after any walk that exceeds 3-5 hours.
Some people lubricate the chain after 100 km of run, regardless of operating conditions. Probably this decision is the most correct, as it teaches you to regular maintenance.
How to assemble the rear wheel brake sleeve
Trouble-free operation of wheels, 100% serviceability of critical parts of the machine are possible only if they are maintained in proper condition. Lubricate the rear hub of the bike regularly as it visually dries. The spokes and rim must be tightened periodically. Bearing balls should also be changed, brake linings should be adjusted as often as possible. Read more.
Again, with a screwdriver, not with strong hammer blows. until it stops. Further, the adjusting washers will not allow it to be tightened. But you shouldn’t make too much effort. Now that everything is assembled, you need to start adjusting the working clearances at the hub bearings Read more.
One of the most important parts of a bicycle is its wheel. In particular, the rear wheel is much more loaded than the front wheel, since it is on it that the ratchet (freewheel mechanism) and the cassette (sprocket block) are installed. The wheel is the main focus when driving, so it is important to understand the design of its hub in order to be able to properly maintain it. details.
At first glance, it may seem that the rear and front hubs of a bicycle have a complex structure, and it is not an easy task to repair and service them yourself at home. But it is not so. Of course there are some design differences, but most of them are the same. Therefore, in this article we will touch upon such topics as: types and arrangement of bicycle wheel hubs, their disassembly / assembly, repair and maintenance, and also consider what, how and with what frequency they should be lubricated. We will try to present the material as briefly as possible in the form of detailed instructions, and in some moments we will add a video for clarity of disassembling the sleeve. details.
When one side of the rear sleeve is assembled, the core is carefully placed in the cage, secured, washers are installed, being very careful, insert the bearings into the cages so that they do not deform. On a free run, check the work of the part. details.
At the moment, there are several types of bicycle wheel hubs on the bicycle parts market: with free wheeling, without free wheeling (used on fix bikes), as well as with a built-in foot brake, with a built-in dynamo machine, and the so-called planetary bushes. There are two types of bearings that can be used in freewheel designs: cone-cup type (mainly from Shimano) and industrial bearings. Since free-wheeling hubs with integral brakes are the most popular, we will discuss their design below. details.
Next, we’ll take a look at how to disassemble and lubricate a bicycle rear hub. In principle, there is not much difference from the method of disassembling the front one (so you can read it first, there are moments that we did not repeat in the description for the back one), except for a few minor differences. details.
To disassemble the bicycle rear wheel hub, you need to pull out the cassette by removing the retaining ring. Cassettes are usually riveted. Some have sprockets of two standard sizes, therefore, having removed them, you need to keep the order. Read more.
Mounting of sleeve parts: right bearings. wheel axle. cone. left bearings. stopper. washers and rivets. lock nut. The rear hub will most likely need to be adjusted after assembly. This is done only on the left side. Using the same wrench, we slightly loosen the lock nut by 15. Then it is twisted all the way, and the cone is held in a fixed position. details.
Bulkheading the rear wheel hub of a bicycle is not a big deal. However, to perform the procedure, you need to know the specifics of the process and have some skills for such work. It is necessary to determine the type of unit, prepare tools and devices, stock up on grease and rags. The list of common actions includes: .
How are the bushings of a bicycle lubricated? This question is relevant for many cyclists. When assembling the rear hub of a bicycle, it is recommended to use grease for bearings, such as Litol and SHRUS. For gears in the ratchet and dogs, a liquid lubricant is more suitable (you can mix it with a thick one). details.
In such cases, it is simply necessary to have such skills as attention to detail and accuracy, since they will help you to repair or disassemble any part, for example, the rear hub of a bicycle wheel. details.
Speed bikes have non-brake rear hubs that are lighter than braking, smaller and simpler in design. When the bike is in motion, free play prevents the pedals from rotating. details.
On a bike without freewheel, the opposite is true: the wheel rotates the rear sprocket, which transmits torque through the chain to the drive sprocket and connecting rods. The non-brake type can be found on the wheel of mountain and road bikes, and the version without free wheeling is used on fix bikes. details.
In addition to drums, there is another type. a worm bushing. These types are found on single speed road bikes. The pedal braking performance is not very high, as only the rear wheel stops. But the resource of such parts and unpretentiousness boldly negate this minus! details.
Looseness and twisting of the rear hub housing can be eliminated by tightening the retaining nuts. With a strong tightening (this also happens), the rotation of the entire wheel is difficult, here you need to loosen the nuts a little. Extraneous sounds and deterioration of roll-off indicate poor quality of bearings or insufficient lubrication. details.
For the correct operation of the wheel and its main parts, incl. bushings, it must be kept in good condition at all times. It needs lubrication, and its body needs to be tightened periodically. In addition, replacing the bearing balls and adjusting the pads on the brake sleeve will not interfere. details.
Rear hub service is essential as in cases where this does not occur, the entire wheel may need to be repaired. Therefore, it is best to take care of your bike in the long run. It should be noted that servicing the rear hub is not much more difficult than servicing the front hub. details.
After lubrication, the bushing must be reassembled. To properly assemble the rear hub, you must adhere to the following rules: .
The rear hub just needs to be serviced regularly. If this is not done, very soon a complex and expensive repair of the entire wheel will be required. It’s better to take care of your vehicle right away for the long term. The rear hub will not require much more effort to service than the front hub. details.
The sports hubs have free play. Those. on such bikes, you can idle back pedaling. On bikes with a foot brake, there is no free wheeling. When pedaling in the opposite direction, the drum brake is applied. mounted in the rear wheel. details.
Lubricate the switches with liquid types of oils during active use of the bicycle with a frequency of several times during the week. Derailleurs on sporty bike models that are used for long-distance riding are recommended to be lubricated before each next ride.
As in the previous case, the nodal mechanism of the bicycle carriage is lubricated with thick substances. Initially, thick grease is plentifully poured into the carriage when the bike is being assembled. Regarding the care of racing bike models, here the carriage is treated exclusively with liquid lubricants.
Shift and brake cables
It is possible to take care of the brake and shift cables using both conventional liquid oils and all kinds of aerosols. For effective lubrication of this element, a small amount of oil, literally a drop, is enough. over, only the inlet and outlet openings of the elements are lubricated through which the cables pass.
The most effective lubricant for chain lubrication is liquid synthetic oil. It is not necessary to lubricate the inner surfaces of the chain rollers, because such actions do not actually entail any practical sense. Instead, it is recommended to oil the outside of the links on both sides. It is convenient to cope with the task, having at your disposal an oiler with a thin end.
Once the lubrication of the bike is complete here, turn the gears and gently wipe the outside of the chain with a dry piece of cotton.
To lubricate the front fork, simply fill a conventional medical syringe with liquid oil. The procedure is carried out by pouring grease under the protective plastic caps, which are located in the upper part of the suspension fork legs.
The rear shock is also treated with a liquid oil. There should be absolutely no problem when choosing the right lubricant consistency for the care of the front and rear shock absorption systems.
For the bike to be fully lubricated, the pedals must be repaired. To do this, the constituent elements of the pedals must first be disassembled:
- the cap that protects the pedal nut is removed;
- the nuts are unscrewed, and then the lock washers are removed and the cone is removed;
- bearings are dismantled and pedals are removed from the axles.
Further, the parts of the pedals are thoroughly washed in kerosene, after which they are wiped with a rag. As soon as all the constituent elements of the pedal mechanism are dry, they are lubricated with liquid oils. At the end, the pedals are assembled in reverse order and installed.
Bicycle lubrication. Lubricate wheel, rear hub, fork, bike bearings
In order for the bike to serve faithfully to its owner for many decades, the bike owner must periodically lubricate all mechanisms. Primary attention must be paid to the chassis. parts that are directly responsible for the movement of a two-wheeled horse.
Types of lubricants
What lubricant to lubricate the bike with? Currently, there is a wide variety of products that can be used to lubricate certain running gears of a bicycle.
- Liquid oils are bicycle lubricants that are suitable for the maintenance of all categories of chains, brake and shock absorption systems. Due to the liquid structure, they effectively envelop the treated areas, ensuring the smooth functioning of bicycle parts for a long time.
- Aerosols. ideal for lubricating threads, switches, cables.
- Plastic type of grease. used when it is necessary to seal various joints.
- Lithium greases. a special type of greases with a whole host of additional components.
- Calcium lubricants. are classified as plastic substances. Designed to care for all kinds of nodes and connections.
Preparing the bike
Many experienced cyclists believe that after each serious trip, and even more so before the scheduled lubrication of the main mechanisms, it is necessary to carry out a comprehensive cleaning of the bike from dirt. This makes it possible to significantly extend the service life of the two-wheeled friend’s defining assemblies and keep it attractive.
Nowadays, the market is overwhelmed with special products in the form of bicycle cleaning fluids. Most of them chew off dirt and clean bike parts in minutes, then rinse off easily.
However, it is not at all necessary to resort to additional costs for the purchase of cleaning fluids. The expected effect can be easily obtained using ordinary hot water and shampoo. Alternatively, you can use the mildest, low-salt dishwashing detergents.