How to replace the rear wheel hub of a bicycle

The STELS FOCUS bike creaked. the reason for the rear fork bushing

The reliable and popular Focus stealth bike or stealth navigator has served me faithfully for five years, but at some point the “creak of the pedals” became simply unbearable, even the music in the headphones does not muffle. It is characteristic that it starts to creak at the moment when you turn the pedals, if you roll “coasting”. no creak. But besides the squeak, there was a significant backlash in the rear fork and wheel, i.e. if you shake the rear wheel, it just dangles. The problem turned out to be not easy, because repair kits on sale are not completely suitable for replacing stealth and adrenaline.

How and what to replace the bush on the STELS double suspension

After talking with smart people, I came to the conclusion that the bushing should be made of bronze or brass, which does not care about corrosion, but in terms of strength it differs significantly from caprolon and will last a long time, without maintenance.

This means you need to look for a turner, draw a drawing and all that, because a turner, if you tell him to carve a sleeve, will immediately require a drawing. And without a drawing, he will look at you like an idiot and send you through the forest.

Why does STELS bike squeak when pedaling

A significant miscalculation in the design of the STELS two-suspension mountain bike is a caprolon bushing in the frame. Even a new bike will creak after the rain, the hub is not protected from dust and dirt, which flies from under the rear wheel just to it. By pedaling, you completely transfer your weight from one side of the bike to the other, causing a squeak in the bike’s rear suspension assembly clogged with dirt and dust. Of course, if you disassemble the bike once a week and remove dirt with subsequent lubrication of the rear suspension unit, it will not creak, but:

  • To lubricate and clean the bushing, it is necessary to remove the connecting rods, and then disassemble the bushing itself. quite a gemoric occupation
  • The rear suspension backlash is formed in any case, the plastic bushing 1 mm thick at such loads just has to be squeezed out and flattened, which actually happens over time.

When I began to understand the problem, I found a repair video. as it turned out, such a repair fixes only part of the problem, rear wheel backlash.

And even then not for long, the aluminum foil as a sleeve under significant load quickly turns into dust and the problem resumes.

aluminum foil rear fork bushing quickly turns to dust

Rear fork hinge bushing drawing

It’s good that among my friends there is a turner and a jack of all trades, turning to him, I got the right part without any problems in a couple of days.

I collected all this happiness for a thick bicycle lubricant for bearings. I’ve been driving for a month on a new bushing, there is no backlash, nothing creaks. beauty!

If you live in Chelyabinsk, I can give the phone number of my friend turner, call 89227229100.

How to Assemble the Rear Bicycle Hub?

After lubricating every part, reassemble the bushing. For proper assembly, the following professional guidelines should be strictly adhered to:

  • The axle is exposed in such a position in which 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.

about replacement

The rear wheel of the bike is under significant stress.

The hub is the basic element, thanks to it the movement of a two-wheeled vehicle takes place.

  • Slides. Works by rotating two elements relative to each other. Made of refractory alloys, the design is simple and reliable.
  • Rolling. They consist of metal balls (rolling elements), they are assembled between two steel rings. There are two types of such devices: bulk, industrial.
replace, rear, wheel, bicycle

The hub axle on the rear wheel can be fixed to the frame. The spokes extending from it are connected to the rim, thanks to the bearings they rotate the wheel.

Hubs with a brake block at the base have bearings, there is a brake mechanism inside.

The most common bushings with a built-in brake, in childhood we rode on such bicycles, the device is stopped by pressing the pedal in the opposite direction.

Varieties and main constituent elements

Hubs are divided into two types. front and rear. The front ones are used exclusively for fixing the wheel. They act as a kind of attachment and axis of rotation of this element.

The rear hub of a bicycle is used not only to secure the wheel, but also to transmit power from the pedals. Therefore, it has high mechanical loads, it is on it that the parameters largely depend.

Bicycle rear hubs differ in materials used for manufacture, design and some other parameters. Several varieties of these parts are now on sale:

  • Planetary. They use an internal gear selector and the main elements are located inside the housing. These parts are very reliable and do not require regular maintenance. Their only drawback is their high cost.
  • Ratchet. They use a set of sprockets that are connected by a ratchet mechanism. Today these are the simplest and cheapest parts, they are installed in inexpensive bikes.
  • Cassette. In these, the rear sprockets are placed in the drum.
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The last two options are considered the most common on the market. This fact is due to their cost. Parts of the planetary type are much less common on the market. They are reliable, but cost a lot and can only be seen in some city bikes.

Rear wheel ratchet bushings are the cheapest and most widely available on the market. But it is better to choose cassette parts. They are more expensive, but much more reliable than models with a ratchet.

Crackle or noise inside the hub

Noises, squeaks, and crunching signals indicate that your bushing should be serviced. And this should be done as soon as possible, otherwise everything may end very badly. First you need to disassemble the bushing, change the lubricant and check the parts for defects. Defective components must be replaced. If after all this the problem remains, then you should consult a specialist. It is possible that it arose due to the poor quality of the bushing itself, and you will have to install a new one.

The rear hub of a bicycle is a very important and often underestimated element of a bicycle, and its axle is subjected to increased stress. Sand, dirt, microscopic debris and dust are abrasive and destroy metal. Failures of the mechanical part of the rear wheel require expensive repairs or even replacement of the entire assembly, so timely and correct maintenance of the hub will significantly extend the life of your bike and help avoid unnecessary expenses.

How to change the bearing

When replacing the rear wheel bearings, first of all, prepare the workplace. For this, the carriage is removed from the axis, while the receiver and the whip are used.

With correct dismantling, all parts are copied into a table so that after the end of the work there are no “superfluous”.

  • The screws are loosened, the axle is removed;
  • The body is cleaned with a cloth soaked in kerosene or “White Spirit”
  • Grease is introduced into the channel where the elements are located;
  • After removing the ratchet ring, the bearings are installed.
  • When making one side of the sleeve, the core is installed again in the cage, then fixed.
  • Testing in progress.

We install the bearings where the ratchet is. It is important to correctly adjust the load, the cone is fixed with a lock nut, which is located in the ratchet itself.

On the transmission side, the axle must be tightened.

In what cases to change

The bushing and bearings must be regularly inspected, tested, retightened and lubricated. This important block cannot be “started”, otherwise the bike will not be able to move normally. Signs When Paying Attention to Rear Hub Bearings:

  • while the bike is moving, noise is heard in the area of ​​the rear wheel fixing unit;
  • wheel play becomes excessive;
  • there is a sharp creak and “crunching” of the bearing;
  • rolling dynamics deteriorates.
replace, rear, wheel, bicycle

If you do not pay attention to the “first signals”, then the situation will worsen, the bike will quickly fail. Before the start of the warm season, you should:

  • Checking the wheels for an important parameter. backlash, the bearings must not be tightened too much;
  • Dismantling of wheels and frame must be carried out in a specialized room.

Rear axle

The rear axle of a bicycle is a threaded rod rigidly fixed in dropouts, which does not transmit torque, but at the same time carries the main load when the bicycle is moving. It is usually made of steel, titanium or aluminum alloy and is an integral part of the bushing.

Depending on the type of attachment, the axles can be hollow or solid. The hollow ones are used in conjunction with eccentric braces to facilitate wheel mounting and dismounting. Such axles have greater rigidity and less weight.

Another way of fastening the wheel is to fix its axle in the frame stays with special nuts. For a frame with horizontal dropouts, an axle with nuts is more suitable due to a more reliable and durable wheel attachment.

Some mountain bikes and cyclocross bikes use thru axles with a threaded end. These axles are part of the frame design and are usually supplied with it.

The thickness of the rear axle depends on the type of bike, and its length is determined by the distance between the dropouts of the frame stays. In some models of bushings, the diameter can be changed using special adapters. The following axes are usually used (the first number is the diameter, and the second is the length):

  • 10 x 135 mm. used in most modern bicycles;
  • 10 x 130 mm. for road bikes;
  • 12x150mm. bike axles for downhill and free ride;
  • 10 × 170 mm. such axles are placed on fat bikes;
  • 10 x 120mm. Suitable for speed track bike.

On bicycles for extreme sports of the High End level, special axles of increased thickness can be used, which have increased strength.

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.

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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:

Design differences

The rear hub device of a mountain bike has some differences from the design of the undercarriage for road bikes.

Bushings for road and road bike models have oil seals. special seals designed to protect bearings from contamination. Often glands are integrated into a single piece with tapered elements.

The rear hub of the Stealth bike, as well as other common models of mountain and off-road bikes, in addition to the oil seals connected to the cones, often has rubber anthers. The presence of such elements helps to increase the protection of the running gear from dirt, all kinds of debris and dust.

Unlike the road bike category, mountain bikes are designed to ride in the most rugged terrain. Naturally, the use of additional protection for the rear hub mechanism will proportionally increase the weight of the two-wheeled vehicle and reduce the ease of movement. That is why the assembly of the rear hub of a road bike is carried out by most manufacturers without installing these elements.

Separately, it is worth considering the design features of bicycles with disc brakes. Here mechanisms are used, the flanges of which are connected to the brake discs.

Differences are also present in the methods of connecting the ratchets to the hub with the cassette mounts. Most common domestic bike models contain hubs with built-in ratchets. In contrast, the rear hub of a speed bike is usually a screw-on type of ratchet.

How To Service Shimano Ball Bearing Hubs. Service A Shimano Hub

Bearings

The rear hub of the bicycle must be equipped with bearings with a dust cover. Only in this case it will be possible to forget about their maintenance and replacement, having driven more than 10,000 km on the bike. Frankly low-quality bearings will make you endure unpleasant sounds and suffer from wheel play after the first ride in rainy weather, not to mention winter. Reliable dirt protection is represented by various seals that prevent contact of the lubricant with the external environment.

Currently, there are bulk and industrial bearings for rear bushings. The difference is that the wheel play can be eliminated by performing the usual adjustment of the bulk bearings. If there is a similar problem in the case of industrial bearings, most likely they will have to be replaced. Therefore, the rear wheel hub of the bicycle should be selected based on the type and reliability of the bearings.

The main parameter of the rear hub axle is its length. To select the hub according to the axle length, you just need to measure the distance between the opposite outer nuts on the corresponding mountings of the bicycle frame.

Bicycle rear hub. repair

As practice shows, the most common and typical malfunction of the rear hub is excessive tightening or loosening of the cone. In the latter case, you will have to endure a noticeable back wheel play. Conversely, overtightening the taper mechanism will result in a tighter, more difficult ride for the two-wheeled vehicle. In addition, a crunching sound may occur in bearings.

What to do when a loose rear hub is the cause of backlash? Repair in this case will consist in tightening the cones using special wrenches. Open-end wrenches of 15 and 20 mm are suitable for this, with the help of which the locknuts are first unscrewed, and then the cones are clamped or loosened to the desired limit.

Ideally, there should be no backlash when the bike is moving. If the adjustment of the tapered mechanisms of the rear hub was made correctly, the wheel will rotate easily without additional impulse, only under the influence of gravity on the reflectors.

Bending of the bushing often becomes the cause of breakage. This most often happens when using low-quality, inexpensive parts. If this happens, only a complete replacement of the axle with a new, more reliable one will solve the problem.

To make repairs or scheduled maintenance of the rear wheel hub easier, it is recommended that the ratchets be removed in advance. However, when the whole essence of the repair lies in the usual tightening or loosening of the cones, it is not at all necessary to resort to such an action.

Overhaul Rear Wheel Hub Of BMX Bike

Ultimately, in order to avoid unnecessary problems in the form of long downtime of the bike and waste on expensive repairs, it is enough to regularly undergo maintenance. Most often, the essence of maintenance is reduced to the bulkhead of mechanisms, their cleaning, lubrication and installation in the reverse order.

How to Assemble the Rear Bicycle Hub?

When assembling the mechanism, you need to take into account the fact that the left and right ends of the axis have some differences. The right cone is firmly connected to the axle, additionally reinforced with a lock nut and therefore never dismantled. The system is adjusted by changing the position of the left cone.

When trying to figure out how to assemble the rear hub of a bicycle, the main thing is not to confuse the side on which the axle with the right taper should be installed. It is much easier to make a mistake here than in the case of a front wheel assembly, where both sides of the mechanism look identical.

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To avoid trouble by connecting the elements of the rear hub into a single whole during installation, the following sequence of actions will allow:

  • To begin with, the bushing body, ratchets and the surface of the cups for mounting the system are cleaned of dirt, remnants of old grease, after which a new grease base with a thick consistency is applied.
  • Using tweezers, the balls of the bearings are placed in the right place and pressed into a layer of grease, the amount of which should be sufficient so that the balls do not roll back.

On this, the rear hub is considered to be practically assembled. The only moment is the installation of rubber boots. However, it is advisable to do this only after the final adjustment of the chassis.

Flanges

These are specific annular protrusions that are contained on the rear hub body. This element is used to connect with the spokes of the wheel. Flanges contain special holes where spokes are inserted when dialing.

The main requirement for flanges is a high strength index. Based on the small size of the part, it is enough just to imagine how much increased loads fall on its share. After all, a third of the structure of the bicycle, together with the cyclist, is located exactly above the area where the rear flanges are located.

How to change the hub on a bike

The rear hub of a bicycle must always be in good condition, because it is it that determines the smooth running of a two-wheeled vehicle. According to many cyclists, the ride quality of a bike depends largely on the type and mechanical performance of the frame. However, in practice, the defining moment here is the state of the undercarriage. bushings, carriages, chains, and other systems.

According to compatibility with different types of brake systems, there are several distinct types of rear hubs:

  • for disc brakes;
  • for roller brakes;
  • for rim brakes.

Of course, the more complex rear hub of a bicycle, designed to be connected to a disc brake system, can easily be used when assembling a wheel with rim brakes, but not vice versa.

Standards

Having studied the internal and external design of the rear bicycle hub, it is recommended to pay attention to the wide range of standard sizes of this system. The presence of some differences in parameters is due to the use of hubs on various types of bicycles:

Download video

How to disassemble the ratchet (stars) of the rear wheel of a mountain bike and make preventive maintenance of this assembly. What to look for when repairing a ratchet.

See my other videos: 1. Why the bike does not slow down (KhVZ, MMVZ) https://www.YouTube.com/watch?v=uQCeelczPMU 2. How to remove the cassette from the rear wheel https://www.YouTube.com/watch ? v = BffRxjwkiG4 3. How to replace the tire and tube on the bike https://www.YouTube.com/watch?v=GXbeZZ8g4oE 4. Which is better. HVZ rear hub or worm hub? https://www.YouTube.com/watch?v=2ftAZFkxC1I 5. How to assemble a worm bushing https://www.YouTube.com/watch?v=p79u2yDPGb4 6. How to eliminate scrolling of the rear wheel of a bicycle HVZ, MMVZ https: / /www.YouTube.com/watch?v=on1Qx3Cvt2E 7. How to install the bike computer on the bike https://www.YouTube.com/watch?v=DjY9s8DKF-Y 8. Review and setup of the ASSIZE AS-820 bike computer https: // www.YouTube.com/watch?v=Mss8zKGauA8 9. How and how to measure the wear of the bicycle chain https://www.YouTube.com/watch?v=sNzVCkxDT5A 10. Centering the old bicycle wheel https://www.YouTube.com / watch? v = bsMX0beXgCA 11. Review of the Satisfaction XC 26 mountain bike from the owner https://www.YouTube.com/watch?v=zPfytIwyvig 12. Homemade bicycle wheel alignment machine https://www.YouTube.com/watch ? v = upN8b0WBzvg 13. XC-771T rear flashlight, review https://www.YouTube.com/watch?v=5rZmw5WOMZM 14. Review of ASSIZE AS 300 bike computer https://www.YouTube.com/watch?v=CTENJZBb1D4 15. Maintenance of the rear hub of a mountain bike https://www.YouTube.com/watch?v=o9gISNsAcI8 16. How to disassemble the rear wheel ratchet of a mountain bike https://www.YouTube.com/watch?v=reER-V3Wvms 17. Review of the ASSIZE AS 827 bike computer https: //www.YouTube.com/watch?v=CtPpF0rgaoQ 18. How to remove the ratchet from the rear wheel of a mountain bike https://www.YouTube.com/watch?v=knVf74CpqwU

thoughts on “How to disassemble the ratchet (stars) of the rear wheel of a mountain bike”

A lot of lubrication is also not needed, so as not to attract stones and sand

How To Replace Cartridge Hub Bearings In Your Road Bike Wheels

It is very common in recent years to make such a zap, collect a lot without lubrication, and it is clear that often a new spare part fails, disassembling and not observing the lubricant. many remember the “” kind word “of the masters and the Chinese.))))

Hello. I recently went over shimano tz21. As they slipped under large loads, and overshoots. What to do? Replacing the dogs? The slots seem to be lively reciprocal. Or pull up the spring?

5 stars each dumbass can make out, but 8-9 none of the vidos have seen yet

Thanks for the video, I figured out how to disassemble this Chinese guano. There is a normal design, no, you have to do it like this.

If the ratchet is slightly loose on the axle, what should I do? retaining ring is it tighten or what?