How to change a wheel on a speed bike

Housing disassembly, cleaning and lubrication

Before proceeding with the disassembly of the case, it is necessary to clean the workplace, since it is very important to carry out all stages very carefully and with utmost care.

First, remove the cassette from the axle using a puller and a whip. Then we open the circlip and remove the washers and bearings. In order not to get confused in details, it is important to remember the original location of the washers and bearings.

If any part is damaged, even the smallest scratches, they should be replaced. Next, you need to pull out the axle, clean the body from dirt with a soft dry cloth, and then start lubricating the parts. We do this as we put the parts in their places.

When to remove the rear wheel

It is unlikely that the idea of ​​unscrewing the chassis from the bicycle frame would just come to mind, unless, of course, a person specializes in bicycle dismantling. But this is a completely different case. Dismantling the rear wheel will be required if the following problems are observed:

  • noticeable damage to the rim;
  • complete wear when a wheel needs to be replaced;
  • a flat tire or a burst tire;
  • bulkhead bushing.

This includes the planned replacement of the rear sprocket system and chain.

Usually one wrench of the appropriate size is enough, with which the nuts are removed one by one. If the hub axle turns, then the nuts are unscrewed simultaneously in different directions. It is recommended to use open-end wrenches or box wrenches. The adjustable version is undesirable, as its thick horns “eat up” the corners of the nut due to loose fit and sliding.

There are three types of defects.

EIGHT. when the wheel rotates, it moves so that the rim is not in the same plane constantly.

EGG. wheel beating up and down when rotating.

UMBRELLA. constant displacement of the wheel to the right or left relative to the hub.

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All of the above defects are corrected by loosening the knitting needles from the side of the bend and pulling up from the opposite. It is important to remember that when the tension of one spoke changes, the tension of the others changes, and all the needles are involved in correcting one or another defect. To gradually reduce the defect “to naught”, you need a wheel straightening machine. You can use a bicycle instead of a machine. If your bike has V-break rim brake mounts, it couldn’t be easier. Removing the brake,

We put on a clothespin on one of the pins (photo 14,15)

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And, moving it to the edge of the rim, we rotate the wheel. Having found the place of the defect in this way and having adjusted the tension of the spokes as needed, we repeat the operation. Thus, you can straighten a figure eight or an egg. The umbrella can be easily straightened by eye.

So, you can put the wheel on the bike and go. Just do not forget to inspect the wheel afterwards and correct new defects if they appear. And henceforth, be careful and monitor the pressure in the chambers. it is better to pump a little than to correct the wheel or assemble it again.

Spokes

A rather vulnerable part of the structure. In addition to the rider’s weight, which is exerted on them, the spokes are regularly subjected to the stress arising from the unevenness of the road surface. The spoke is fixed in the rim with a nipple. The most common materials for manufacturing are steel and aluminum.

Depending on the production process, the knitting needles can be:

  • katan (the cheapest option);
  • pulled (lighter, but more expensive);
  • flat (the most expensive option, surpassing others in weight and resistance to oncoming air currents).
change, wheel, speed, bike

So, step by step

  • The rim brake opens, if any
  • We remove the damaged wheel, having previously unbuttoned and unscrewed the eccentric. Make sure that the unscrewed nut and the removed spring are not lost when falling
  • We lower the pressure in the chamber to the minimum
  • We stick a bead between the tire and the rim located on the side of the wheel. The side must be opposite to the nipple
  • We release the border towards the center of the wheel and hook it onto the spoke, do not forget to do this, because this is a common mistake of novice cyclists
  • After 5-10 centimeters, repeat, but with a different border
  • We remove evenly, with both hands, finish near the nipple
  • Removing the camera
  • We remove the second bead of the tire. Do not forget to look and feel the tire, suddenly there is some sharp object or pebble that will ruin the next tire
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How to change the rear wheel on a speed bike

Carrying out a spring revision of my old high-speed bike, we found an “eight” on the rear wheel. a change in its geometry. The rim was bent so much that it constantly touched the brake pads, making it impossible to drive safely.

First we decided to tighten the knitting needles. There are special ways to do this at home. For those who are interested, it is enough to search the Internet for how to fix the G8. A closer inspection revealed that a pair of spokes was missing. The plastic spoke guard installed on the wheel makes it difficult to install new ones, so it must be completely disassembled.

Turn the bike upside down, unscrew the eccentric clamp nut, remove the eccentric itself from the hole in the axle, release the footrest, remove the chain and wheel. In this case, you need to loosen the brake pads and release air from the wheel so that the tire does not cling to them.

Unscrew the nipple, pull out one side of the tire, gently prying it with a flat screwdriver, without tearing the camera. Take out the camera, then remove the tire.

Now you need to remove the asterisk. It is impossible to do this without a special puller, so we took care of its purchase in advance.

Inserts the puller inside the sprocket and unscrew it with a gas wrench. By the way, for these purposes, any key for 24.

Our speed bike had a single rim wheel. Almost all modern bikes are equipped with double rim wheels. It is believed that they are stronger and more reliable. The difference in price is not very big, so we listened to the seller and bought a copy with a double rim.

At first, the plan for replacing the rear wheel on a speed bike seemed simple: screw the sprocket onto a new one, insert the tube, insert the tire, and mount it on the bike. But upon closer inspection, it turned out that the wheel axles are different. The old one. with a hole inside for the eccentric, and the new one. without it.

Therefore, I had to rearrange the axle from the old wheel to the new one. This requires 2 keys. We hold the locknut with one, and unscrew the other with the other. Having unscrewed, remove the washer and unscrew the locknut, which is the bearing boot. While loosening the nut, watch out for balls that may fall out of the gap formed. Now you can remove the axle.

In the same way, we remove the axle from the new wheel. The grease in it is fresh, thick, so the bearing balls, sticking to it, were in their place.

Carefully, adding fresh grease, insert the axle with a hole for the eccentric onto the new wheel and tighten the nuts in the reverse order.

It is necessary to tighten the nuts with a cone for the bearing until there is no play in the carriage, but at the same time the wheel rotates freely. On both sides of the axle along the edges, we leave a space equal to 1 cm so that it fits into the eyes of the rear fork of the bicycle. This distance is adjusted with a bushing washer. Tightening the second nut, we fix the first with a key so that it does not move, otherwise the wheel will spin with effort.

Then we collect everything in the reverse order. We install the protection of the spokes, with the help of a puller we twist the asterisk.

On the one hand, fill the tire, insert the camera, fill the tire completely. We pump the chamber with a pump, then bleed the air so that it fits into place.

Now we take the wheel, put the chain on the sprocket and install the axle in the fork eyes. The tire, having pressed on it, must be pushed between the brake pads.

Install the footrest, insert the eccentric clip and secure it with a nut.

Let’s adjust the brakes by fixing the pads near the rim. We pump up the camera and make a test drive. This completes the replacement of the rear wheel of the sports bike. If you liked the article, share it on social networks.

When to remove the rear wheel

It is unlikely that the idea of ​​unscrewing the chassis from the bicycle frame would just come to mind, unless, of course, a person specializes in bicycle dismantling. But this is a completely different case. Dismantling the rear wheel will be required if the following problems are observed:

  • noticeable damage to the rim;
  • complete wear when a wheel needs to be replaced;
  • a flat tire or a burst tire;
  • bulkhead bushing.

This includes the planned replacement of the rear sprocket system and chain.

Usually one wrench of the appropriate size is enough, with which the nuts are removed one by one. If the hub axle turns, then the nuts are unscrewed simultaneously in different directions. It is recommended to use open-end wrenches or box wrenches. The adjustable version is undesirable, as its thick horns “eat up” the corners of the nut due to loose fit and sliding.

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Removing the cassette and bulkhead bushing

A hub is one part of a bicycle wheel that requires periodic maintenance. On average, you need to look into it once every 2000 km of run, in terms of time it is 2-3 months of active driving. If the wheel is already squeaking and there is a decrease in the efficiency of rotation, in other words, the great rides worse, then it’s time to remove it and inspect the hub.

The main problems with the bushing are backlash and insufficient lubrication of the bearings. Due to a violation of the fit or increased friction, the parts begin to wear out rapidly. If the wheel has not been serviced for a long time, the bearings may crumble altogether. To gain access to the bearings of the hub, you will need to temporarily get rid of the rear sprockets.

The reverse gear is removed using a puller and a so-called whip. Removing the cassette is a short-lived affair, but it will take a lot of effort to unscrew it from the wheel. In stages it looks like this:

Before disassembling the hub, you should slightly loosen the spoke tension. This can be done using a round key with knocked out holes for different diameters of the knitting needles. You need to loosen a little, a quarter of a revolution is enough. If the sleeve needs to be replaced, the spokes must be unscrewed enough to easily pull it out of the engagement.

A complete bushing replacement is required if both the axle and the bearings become unusable. However, often when the bushing is jammed, the axle is in normal condition, it is enough to change the bearings. Often, both will still serve faithfully if they are well lubricated. Proper lubrication will prevent parts from wear under dynamic loads.

The bulkhead of the axle part of the wheel is associated with cleaning the axle and bearing balls from dirt. The removed parts must be temporarily placed in a solvent, then allowed to dry, lubricated and reinstalled. Bearings in a skewed position must be adjusted by returning them to a straight position. However, during the backlash, the parts are already faulty, so replacement is the best option.

How to remove the rear wheel on a speed bike

Any experienced cyclist knows how to remove a bicycle wheel on his own. This action often has to be done when a wheel needs to be repaired, replaced with a tire, rim or spokes, or simply replaced with another, more reliable or new wheel.

However, on newer bikes with different derailleurs and many parts, it is very difficult to change the wheel for a beginner who can do something wrong and panic.

Let’s figure out how to remove the front and rear wheel of a bicycle on our own, together.

Spokes

A rather vulnerable part of the structure. In addition to the rider’s weight, which is exerted on them, the spokes are regularly subjected to the stress arising from the unevenness of the road surface. The spoke is fixed in the rim with a nipple. The most common materials for manufacturing are steel and aluminum.

Depending on the production process, the knitting needles can be:

  • katan (the cheapest option);
  • pulled (lighter, but more expensive);
  • flat (the most expensive option, surpassing others in weight and resistance to oncoming air currents).

How to remove the rear wheel

Removing the rear wheel is as easy as removing the front. However, before removing the rear wheel from the mounts, you must first remove the chain from the axle, and also open the brakes so that they do not interfere.

Sleeve

The hub is located in the center of the wheels and is attached to the bike frame. Provides wheel rotation, eliminating slippage and turning. Rear hub helps roll the bike. efficient travel without wasting energy.

Bicycle rear hub design provides the following configurations:

  • the presence of a free wheeling, lack of a braking mechanism;
  • lack of free play, the presence of a brake mechanism;
  • the presence of a free wheeling and braking mechanism.

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The dimensions of the hub, its weight and quality affect the ride and energy consumption of the cyclist while riding. There are three types of this node.

  • Ratchet Hub. Modern rear hub allows cassette sprockets to be mounted on the drum. The bearings are located closer to the middle, which negatively affects the uniformity of the load distribution. It is customary to complete teenage and inexpensive bicycle models with similar bushings.
  • The cassette hub is another modern mechanism option. In this case, the cassette is fixed by means of the slots located on the sleeve. Such bushings are reliable and can withstand loads of up to 120 kg, since the bearings in them are located closer to the edge.
  • The planetary hub of the rear wheel of a bicycle is a design that combines the functions of a hub and a derailleur. The device of the rear wheel hub of this type of bicycle is rather complicated: the mechanism is closed by a case, which protects it from dust and moisture. At the same time, when working with it, the chain will last longer, since it does not change the position for switching speed.
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The 3-speed hub has a simple design, while the 5- or 7-speed gears are best left unassembled. Gears of planetary systems are installed in a certain position during assembly. Such work requires special equipment.

Removing a wheel from a bike

Removing the rear and front wheels of a high-speed bike, as well as cassette and sprockets.

Carrying out various types of repair work on bicycles is, in essence, not so difficult. This type of transport has rather simple designs of most of the parts, which allows its owners to carry out repair work with their own hands, instead of contacting a master. It is only important to show a little patience and diligence when performing certain types of work, especially those associated with any complex structures such as a brake system or gearbox. This is usually the case with high-speed and mountain types of devices.

How can this be done?

Rear

Removing the wheel will not be difficult for the bicycle owner if all the steps are followed correctly. First of all, it is necessary to determine which parts are planned to be removed. Most of the difficulties arise precisely with the rear. Before removing the rear wheel of a bicycle, you need to determine which brakes are used on it. It is important to remember that if the bike is high-speed, then the brakes, as a rule, are disc brakes and their repair should be carried out as carefully as possible so that, before removing the rear wheel of the bicycle, by unforeseen accident, the sprocket, which is the heart of the brake and the speeds of this type of transport.

  • So, having decided on the brakes, you can already get down to business.

To carry out this repair work, the bike must be turned upside down so that the installation is fairly stable. The wheel is removed by unscrewing a special nut on which it is fixed. The nut is unscrewed in the classical way counterclockwise. When unscrewing, you need to be careful and careful not to hurt the tire, brakes and sprocket. It is not necessary to unscrew the nut completely, as it may be sufficient to simply loosen it until the wheel can be removed. If there is a desire to return it back to its place, then it will be enough just to put it exactly in the grooves and tighten the nut again. It is only important to remember that the nut is already being screwed not against, but back, clockwise.

There is also a special lever instead of a nut. The situation is even simpler with it, since no wrenches are required to unscrew it. In order to remove the wheel using the lever, it is necessary, as well as the nut, to start unscrewing it counterclockwise until it becomes possible to remove the part. You can put it back in the same way.

Front

Repairing the front part is even easier than the rear one, because it is not equipped with brakes and other complex systems. It may be necessary to remove the front wheel, for example, in order to remove the tire from it. To do this is elementary and simple. It is enough, as in the rear element, to unscrew either the nut using special sized wrenches or using the lever, in the right direction and carefully. At the same time, no structures will interfere with the repair, which greatly simplifies the task.

Summing up, we can conclude that removing the wheels is not such a difficult task. The main thing in this matter is to show maximum accuracy and to turn the parts correctly, on which, in fact, the wheels are fixed. Following this algorithm, you can easily provide yourself with a high-quality repair of wheels or other necessary spare parts, which will subsequently allow you to fully enjoy driving your favorite vehicle.