Straighten the figure eight on a bicycle wheel with your own hands

Eight on a wheel

Probably, every cyclist when buying a mountain bike pays attention to the rims, because they can be one-, two- or three-layer, and the more layers, the less likely the occurrence of an eight. Nowadays even inexpensive mountain bikes are equipped with double-layer rims, but even three-layer rims cannot guarantee 100% protection from the figure eight.

How to fix a figure eight on a wheel

First, we turn the bike over and, holding a marker or pencil at a distance of 1 mm from the side surface of the bent rim, turn the wheel. A strip will appear in the place of deformation of the wheel. Do the same on the other side of the rim.

Now you can start directly correcting the figure eight. Pay attention to the arrangement of the needles: one on one side, the next on the opposite, i.e. they alternate quite logically. Now find the spoke closer to the center of the line drawn earlier from one side of the rim and going to the opposite side. It will then need to be pulled, but first you need to slightly loosen the two adjacent knitting needles fixed on this side. It should be noted that tightening must be twice as strong as loosening. The same operation should be done on the back of the rim.

But look, do not get carried away, since you need to tighten and loosen quite a bit. It all depends on the “seriousness” of the figure eight, so the knitting needles should be twisted ¼-½ a turn. Now erase the lines and repeat everything from the beginning until the wheel is straight. This is basically all that is needed to fix the figure eight, but if the wheel was damaged and it was rear, then you may need to adjust the forward and reverse gears.

Figure eight on a bicycle wheel

Oftentimes, the figure eight appears as a result of a strong impact of the wheel, but the impact is not the reason for the appearance of the figure eight. The blow can be attributed to the final stage of the emergence of the eight, the real reason is the loose spokes. Therefore, for prevention, it is necessary at least once a season to tighten the spokes on wheels using a special key, especially mountain bikes.

If the figure eight has already appeared, do not get too upset, this is not critical. it can be repaired, like a punctured tire (see the article “Repairing a bicycle camera”). To do this, we need a knitting key, a marker or pencil and a little patience.

Failed to fix figure eight on bicycle wheel?

Attention! If, as a result of your actions, the figure eight on the wheel has become even larger, then you should return everything to its place and carefully re-read this instruction again. Another important point is that you should not leave the needles both loose and overtightened. You may not be perfect on the first try, but remember that with experience everything will turn out much better.

In the event that the rim is severely bent, it is better to contact a professional service, as something else, for example, the stem of a bicycle, may be damaged and most likely professional repair or replacement of these parts will be required. Always be careful and take care of yourself!

The text was prepared by Roman Borisov.
Posted May 29, 2020.
Headings: Repair and maintenance.

  • Tags:
  • tool
  • wheels
  • rim
  • repairs
  • knitting needles

Deformation elimination algorithm

First you need to determine the problem area as accurately as possible, identifying the lesion focus. Next, you need to find the central wire in the affected area.

Please note: if the figure eight falls to the right side, the first step is to tighten (or loosen) the spoke on the opposite side with a spoke wrench.

After performing the manipulation (you need to tighten the needle little by little, by about 1/3 of a turn), you must immediately check the result. Next, in the same way, you need to tighten the adjacent knitting needles on the opposite side. The number of key turns for tightening adjacent spokes should be approximately two times less than the central spoke tightened. As you move away from the deformation site, the number of revolutions should gradually decrease in proportion.

How to straighten a figure eight on a bicycle wheel

Eight on a bicycle wheel. fix it yourself

The spoke wheel is one of the most classic elements of your bike, as it is found on most modern bicycles. The configuration of such a wheel includes:

In the course of long-term operation, the wheel is subjected to significant stress and can be deformed over time. Therefore, every cyclist should be able to fix simple problems on his own.

Wheel deformation is called “figure eight” in the event that part of the rim deviates from the plane of rotation. With such a malfunction, you can ride a bike, but there will be no pleasure from such a walk. over, over time, the figure eight will lead to the fact that the rim will completely become unusable and will need to be replaced with a new one. Therefore, it is better not to delay and fix the problem immediately after its identification.

How to correctly identify the presence of an eight?

If you begin to suspect that the wheel is deformed, the first step is to find the place where the rim is curved. This can be done in two ways:

In the first case, you simply spin the wheel vigorously and define a curved section. It will constantly move away from the plane of rotation. At this point, you need to grab the wheel with your hand and mark the deformed area with a marker.
Preferring the contact method, you take a marker and rotate the wheel, drag it along the rim. The marker should make a full circle and after that you will clearly see the place of deformation.

how to identify the eight

After you have identified the area of ​​deformation, the only thing left is to eliminate the figure eight. You can easily do it yourself without asking for help from specialists.
There are two main ways to eliminate the figure eight:

Experienced cyclists do not really trust this method and resort to it in the event that the deformation of the wheel caught them suddenly on the road and you need to fix the malfunction in order to get to the destination.
In order to correct the figure eight by force, it is necessary to remove the wheel from the frame, turn the deformed section towards you and firmly grab the rim and tire on both sides. Press the deformation area with your knee and press away from you with maximum force.
It is difficult to call this method effective due to the following reasons:

  • You will not be able to eliminate small bumps
  • There is a risk of bending the rim the other way
  • Eliminating the figure eight by this method is very inconvenient.
  • Some rims are simply not subject to human force

Eliminating the adjustment by tightening the spokes

elimination of the figure eight by pulling the knitting needles

Defect elimination tools

To repair your vehicle yourself, you will need the following tools:

  • marker or chalk;
  • plastic assemblies for dismantling the tire;
  • spoke wrench.

Causes and types of defects

The most common types of bicycle wheel defects are figure eight and egg. The occurrence of deformations is facilitated by the active operation of the vehicle and intensive driving on uneven bumpy roads.

You can identify and correct these types of deformities on your own, without resorting to the help of a qualified specialist. It is quite easy to diagnose the presence of defects. To do this, turn the bike upside down, placing it vertically.

Next, you need to spin the problem wheel by rotating it around the axis. As a rule, the figure eight is visible to the naked eye. If we are talking about a slight deformation during the rotation of the wheel (if the figure eight is not visible, upon first examination), a characteristic clicking sound will be heard.

Mountain biking. How to fix a figure eight on a wheel and change spokes?

A figure eight on a bicycle wheel is the most common deformation. Today, when creating bicycles, the latest technologies are used, but even on an ultramodern bike, the wheel remains very conservative, spoke. The design in this case does not represent anything complicated: the bushing, but the rim and the spokes that unite them. During operation, every cyclist is faced with wheel deformation. And the appearance of the “eight” on the wheel is far from uncommon. This is due to a violation of the integrity of the rim and looseness of the spokes.

And yet why does this deformation occur? During operation, the wheel is inevitably subjected to stress as soon as the cyclist takes his place on the saddle. We add road irregularities. pits, bumps, poor coverage or lack thereof, and the question of the reasons for the emergence of “eights” disappears by itself. In addition, inexperienced cyclists often distribute their weight incorrectly on the bike, which also increases the load. Sharp braking, jumping and other extreme sports, as well as long-term operation, also make it necessary to adjust the wheels.

As you can see, during operation, the bike experiences loads that are least dependent on your riding style. Over time, the geometry of the wheel rim changes. it deforms. The speed of its manifestation depends on the presence of defects in the rim (figure eight, displacement of the “umbrella” and “egg”). It should be noted that the service life of wheels often also depends on the materials from which they are made and their quality. Sometimes inexpensive models may require repair much earlier than those made from expensive components (for example, a high-strength rim).

How to tell if a wheel is bent?
When there is a suspicion that the wheel has lost its original shape, the bike should be turned over and a thorough inspection should be started.

First you need to inspect the wheel in the place of the expected curvature. To do this, spin it, while in the case of the rear one, you can do this using the pedals. It is visually obvious that the curved sections move to the side during rotation. Now it remains to grab it with your hand in that place and stop it, which is quite difficult.

Another, more powerful way is to use a crayon or marker. When spinning the wheel, it must be brought to the rim. First of all, the stroke will remain on the bulge of the figure-of-eight. By spinning more strongly and bringing the chalk closer to the rim, you can also determine the boundaries of the curvature.

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How to fix the “eight”
And now the curvature is found. Each cyclist can fix it with his own efforts, and, given that deformation is not a rare phenomenon, valuable experience comes over time. There are two ways to get rid of the “disease”:
power rectification;
tightening and loosening the wheel spokes.

Required set of tools for deformation elimination:
1) chalk to mark the area with a defect;
2) a spoke key;
3) wheel straightening machine (desirable, but not required).

The figure eight, small in size, can be eliminated without dismantling the wheel. To diagnose the problem, turn the bike upside-down to check that the wheel is in the correct position relative to the brake pads. This process can be divided into several operations. First you need to identify the deformation. As the wheel rotates, press a piece of chalk onto it. In places where the figure eight is formed, you will see a corresponding trace. This simple method will help you determine the exact location of the rim deformation.

Next is the tightening and loosening of the knitting needles, but only from a certain side, which will be described in detail below. If such manipulations are performed with inaccuracies, you can give the wheel even greater deformation. There are several ways in which it can be removed.

Power straightening
Considering this scenario possible, the wheel should be removed from the frame. However, the tire and the camera should not be removed. We turn the wheel with the bulge towards ourselves and grab the rim and tire with our hands. At the same time, the average deformation requires a hand position equal to 10 and 2 o’clock on the dial. We use the knee, putting it on the convex area, and push hard from ourselves.

If there is enough strength, this is done by weight. Or you can position the wheel vertically, with the deformed section up. In this case, the help of a partner is required, who will press the wheel to the floor. After this extreme straightening, the wheel is returned to the frame and tested.

But this method is not always effective. It is not accurate, small deformations are not corrected. Among other things, inept actions can provoke new bends. Yes, and not every rim will succumb to the impact of the foot. high-strength modern wheels will remain “on their own”. Although, if the wheel let you down somewhere along the way and the “eight” happened suddenly due to, for example, hitting a large stone, “force straightening” is the only possible way.

Wheel spoke adjustment
Bicycle running characteristics often depend on the correct tension of the spokes. The tension on the spokes adds strength and elasticity to the wheel. In this case, the tires are removed, the tension of each spoke is carefully checked. It happens that the rim is bent as a result of their general weakening. In a situation where the spokes dangle like guitar strings, they should be tightened 1 turn of the key. In the found area of ​​curvature, a spoke is searched for, located in its center, that is, at the bulge itself. The turn of the knitting needle must be carried out in the direction opposite to the direction of the bulge. In this case, the spokes located on the sides of the central one are weakened.

If the figure eight is between the two nearest knitting needles, then using a special key, the first knitting needle is tightened by a third of a turn, and the knitting needle next to it is twisted in the opposite direction, loosening the clamp by a third. If the figure eight is three knitting needles, the following actions are taken:
tightening the central spoke by a quarter of a turn with a key;
slight loosening of the outer needles (half the tension in the center).

If the figure eight has a size of seven spokes, the procedure is as follows:
the central spoke is tightened by half a turn;
the second and third needles must be loosened by a quarter of a turn;
the fourth and fifth are tightened by one eighth;
the sixth and seventh (i.e. extreme) are weakened by one eighth.

That is, the alternation of tension and stretching of the spokes should be carried out so that the outermost spokes of the “figure eight” are weakened. After the procedure, the wheel is installed in its place and tested for possible distortions. If the figure eight is bent in the opposite direction, all tension is eliminated and tightening on the weakened spokes is increased. After which everything is repeated, but to a lesser extent. The result of a long operation is the alignment of the wheel to a perfectly flat circle. At first, the work will not go so quickly, but with the acquisition of experience, the speed of adjusting the spokes also increases.

Change the needles
Not all craftsmen know how to assemble wheels efficiently, and therefore it is best to learn how to do it yourself. The assembly is carried out according to a certain algorithm.

Knitting needles work:
it is necessary to lubricate the thread of the spoke and the rim in places where there is contact with the nipples, otherwise the spoke will not be tensioned with sufficient rigidity;
in a situation where the flanges of the hub have a countersink on the only side, the spoke heads are on the non-channeled one, it is needed to bend the spoke;
nine spokes are inserted into the flange so that there is an unoccupied hole between them, and so that the heads are located on the outside. In a rear wheel situation, start from the right side of the hub;
on the rim, among the holes shifted to the right, you should find the one closest to the hole for the camera nipple;
the first spoke is attached to this hole, it is considered the key;
from the key spoke, four holes should be counted, moving clockwise, put the next spoke and wrap the nipple;
as a result, there should be three unoccupied holes between the knitting needles, the knitting needle closest to the valve hole is located to the right of it, and the cut part of the sleeve is facing the master;
then the remaining seven spokes are fixed, while every fourth hole in the rim is used;
after turning the wheel, nine more spokes are connected to the rim, inserted into the left flange from the outside;
the tenth spoke should be to the right of the key, adjacent to it, but not crossing;
after mounting the tenth knitting needle, the next eight are recruited in the sequence specified above;
and now the drive spokes are already in place and their heads are on the outside of the flange. In this case, the nipples are turned only for a certain number of turns;
tension spokes are installed with heads on the inside of the flange. A spoke is threaded into the flange hole and the sleeve is rotated so that all the spokes in place receive a certain direction that is closest to the tangent relative to the flange. The first tensioning needle must cross the three driving ones standing in place, while each tensioning needle must pass from the outside of the first two crossed by it under the third, also crossed;
the rest of the spokes get on the same principle.

Tension
Before tightening the spokes, screw all the nipples equally. Then you need to start the process by screwing each nipple one turn. If there is a “shiver” in the needles, the tension is increased. We install the wheel for testing and remove all defects of the “eight” type.

Eliminating radial runout
An oval “egg” wheel rim looks like this: one part of the rim is closer to the center than the rest. This wheel flaw appears after unsuccessful landings. Fixing such a breakdown is much more difficult than the usual eight:
1) remove the tire and inspect the rim;
2) turn the bike body over, spin the wheel, holding an object on top. Mark with chalk the part of the rim that will lift the item;
3) simultaneously trace three directions:
– loosen the tension from the center spoke;
– pull the adjacent knitting needles by the same number of revolutions so that there are no eight;
– the spokes at the opposite end of the wheel should be tightened to prevent the appearance of an “egg” in another place.

To eliminate such an eight, considerable experience is needed, the process is characterized by its own difficulties. After correcting the “eggs”, you need to press on the knitting needles with all their weight, as in the above scheme. to shrink them. Editing “Umbrella”
Cyclists are familiar with the concept of an umbrella. The defect is as follows: the wheel rim is displaced to one side and is not perfectly aligned with the center of the hub. How severe this bias is for the bike itself depends on the frame design and the brake configuration. This type of malfunction often occurs when the wheel is not assembled correctly. The “umbrella” is eliminated by analogy, like the usual figure eight. On the one hand, you need to tighten the knitting needles, and on the other, loosen them. Unlike the elimination of the usual figure eight, in the process of editing the umbrella, the effort for each next knitting needle should not be weaker, but maintain uniformity around the entire circumference.

Let’s summarize
Eights appear on the wheels of even the most experienced and savvy cyclists. In order to straighten a wheel, you need to remember a few simple rules. Always overtighten the wheel spokes. there is a risk of damage to the rim. If during straightening one or more of the knitting needles are overtightened, loosen them and the adjacent knitting needles. Only then repeat the adjustment again.

When riding a bicycle, the spokes often break, being in a state of weakening. If during the pulling procedure one or more spokes of the wheel are loosened, be sure to tighten them in order to repeat the adjustment after that.

Determination of curvature on wheels

So, there is a suspicion of the occurrence of deformation of the wheel, and it remains to determine exactly where it was formed. Turn the bike upside down and fix it clearly.

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The first method of identification is visual, which allows you to find the location of large and medium defects. The wheels must be spun strongly, since at low speeds the eights, even the coarsest ones, show poorly. The rear wheel can generally be pedaled.
Curved sections move away from the plane of rotation to the side. At maximum deflection, the wheels must be quickly grasped in this place. It is not easy to do this at high speeds, and the hand can slip off, so it is better to resort to the following method.

The second method. contact, consists in marking the damaged area. As an indicator, you can take a marker, or rather a regular crayon. Spin the wheel and slowly bring the chalk to the rim. The first thing he does is strike a figure eight along the edge of the bulge. After the “top” is determined, the wheel must be spinned even more and continue to bring the chalk closer. This defines the entire area of ​​curvature. As soon as the chalk “runs” over the entire rim, the test can be considered complete. The focus of the figure eight will clearly stand out with a bold line against the background of a pale stripe along the entire circumference.

Umbrella repair

To fix the umbrella, it is better to use a special device. an umbrella meter, it reveals the symmetry or asymmetry between the sleeve and the rim. If its central screw is in contact with the axle, and the blades do not reach the rim, we tighten the spokes from this side. If, on the contrary, the blades are on the rim, and the central propeller is not in place, we tighten the spokes from the other side. It must be remembered that on some bicycles the umbrella is deliberately shifted (for example, on multi-speed ones).

Of course, in order to eliminate the bends on the rim, you can turn to a professional with good quality. But eights appear regularly, and learning to correct wheel deformations on your own can save both time and money. It is not very difficult to repair a bicycle rim, and almost every experienced cyclist who has held a spoke wrench in his hands at least once will succeed.

If your wheel is bent and you don’t know how to fix it, you are in the right place. I have already come across this problem and I will tell you just the repair is possible, everything is quite simple. over, I will say that the problem that you are faced with will most likely arise at an enviable frequency if you love your bike and ride it several times a week. Therefore, it is worth learning this once, so that in the future you can remove the breakdown yourself every time it occurs.

  • articles:
  • How defects can form and why?
  • What tools we may need to eliminate defects?
  • How to straighten a wheel in practice and how to determine exactly where the figure eight goes on a bicycle wheel

You also need to know how to glue the bike camera. Also, be sure to read how much pressure you need to inflate the wheels of the bike here.

How to tell if your wheel is okay. Simply place the bike upside down on the saddle and handlebars with the wheels up. Spin the problematic wheel, as you think, (spin it in the sense of rotating it around its axis) and check it first by eye. If everything is in order with the wheel, then it will rotate around the axis absolutely evenly. If there is a figure eight, then it should be visible to the naked eye, or more often something like the beating of a wheel in a certain place. It is necessary to look at the wheel in profile and in face, since the bending of the wheel can occur in different directions.

How to True (Straighten) a Bicycle Wheel

Types of bends that are possible in principle:

the most common type of defects is wheel eight,

The eight wheel tilted to the left, the dotted line shows how it should be

egg bending is also common. This is when the wheel loses its circle shape and begins to resemble an egg.,

The wheel is curved like an egg. The dotted line shows how it should be

bend type umbrella. Usually it is associated with a factory defect, it is better in this case to contact a specialist. Here I will not analyze how to fix it. This bending is due to the uneven placement of the wheel in the grooves of the fork.

Umbrella curvature. Dotted line as it should be

How defects can form and why

There is a widespread belief that the wheel can change its shape if you do not ride carefully, when driving over bumps or during unsuccessful jumps. This is all true. That is, all this, of course, affects the rapid wear. But that’s not the only reason a wheel can break. When the cyclist sits on the bike, the wheels are already loaded in the vertical direction. Further, when braking at speeds, the wheels can deform, forming eights. When maneuvering (cornering) in any direction and hard braking. In general, I think you can not explain what sloppy driving is, you yourself understand everything perfectly. So caring for your bike can put off the problem, but over time you will come back to it anyway. Even if you ride very carefully on a good road, such is the specificity of a bicycle.

Of course, everything still depends to a large extent on the wheel rim itself, on its physical characteristics. Therefore, when buying a bicycle, one should pay the seller’s attention to such things, wondering how long the wheels can last, how they react to the deformations described above. So on cheap bicycles, the rims are correspondingly less strong. And various bends (egg and eights) of the wheels can form much earlier than on their more expensive and high-quality counterparts.
In general, how the problem can arise, I think you already understood. So let’s get straight to how to solve the problem and align your wheel.

What tools we may need to fix defects So, in order to fix your wheel, you may need:

  • spoke key
  • crayon or something that can draw on the wheel rim (water marker)
  • universal plastic assemblies for dismantling bicycle tires.
  • We need the spoke key to loosen and tighten the wheel spokes. I must say right away that you won’t have to tighten up much. You will gradually tighten the knitting needles and check the results immediately.

    General algorithm for eliminating problems with a deformed wheel

    We determine the general algorithm in which specific place the figure eight begins and where it ends (we select the lesion focus). The next step is to find the center needle in the figure eight and work with it. If our figure eight falls to the left side, select the spoke on the opposite side and pull it up to a distance of less than one turn of the spoke key. Then we take two adjacent knitting needles, these will be knitting needles already on the opposite side of the previous knitting needle, we loosen them by the number of revolutions a little less (for example, 2 times less) than we tightened the previous knitting needle. And so on until fully straightened. That is, the next two knitting needles (they will be placed on the opposite side) are already tightening even weaker than the very first knitting needle. As you move away from the central spoke (lesion focus), the number of revolutions, respectively, will also decrease gradually.

    So, again, how do you fix a figure eight on a bike? To fix the wheel, we select a section where there is an eight, and along the length of this entire section, we loosen and tighten the spokes going one after the other. On one side of the wheel we loosen the spokes, on the other we tighten. When the required operations have been completed with all the spokes, we rotate the wheel again and see the correct movement of the wheel around the axis. If it gets worse, we return the knitting needles to their previous place and make the tightening-weakening less. Thus, the skew in one direction leading to the figure eight will gradually level out. In order to perfectly align the figure eight, you will have to patiently and painstakingly perform all the above actions slowly (i.e. we twist a little).

    The larger eight is treated in the same way as the small

    The wheel is flattened by an egg, the straightening algorithm is slightly different. We only pull up the right side

    The egg-on-wheel defect occurs most often due to unsuccessful landings. It flattens strictly vertically. Quite often, an egg in combination with an eight is found on the wheel. So, having corrected one, do not forget to correct the other. Unlike the figure eight, an egg-type defect is treated by pulling the knitting needles on both sides. We also identify the lesion and gradually, as shown in the picture above, we need to straighten the egg by pulling the knitting needles. It will be said below, but it is necessary to ensure that all the spokes are not overtightened or, on the contrary, too loose.

    How to straighten a wheel in practice and how to determine exactly where the figure eight of a bicycle wheel goes

    How to determine exactly where the eight passes. Masters who have gotten their hands on in this matter can fix the problem without improvised means (crayons and other things). You will have to edit the wheel first using a crayon. We spin (rotate) the wheel and gradually bring the chalk to the rim of the wheel rotating in the axle. In those places where there is an eight, the chalk will touch the rim and scribble serifs on it. So you define an eight for yourself.

    I saw another great option on how to straighten a figure eight on a bicycle wheel in one video. We take ear sticks. On both sides of the wheel we have front fork stays. We attach ear sticks to these feathers on the scotch tape from both sides and, just like with a crayon, rotating the wheel, gradually bring the ear sticks to the wheel rim and mark the places where they begin to clearly touch the rim with chalk. Quite a convenient option, since it can be quite problematic to hold the chalk on the weight. If your wheel is flattened like an egg, that is, it has lost its perfectly round shape, we do everything the same as for the figure eight, only we just bring the chalk from the outside of the rim where the tire with the camera should be.

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    As you can see from the above, eliminating the figure eight on a bicycle is not a very difficult process, and what is most pleasant is available to everyone. The only thing I want to add is that when you have done all the work on aligning the figure eight on the bike, be sure to check all the other spokes. What shouldn’t be? The spokes should not be loose or overtightened. Freely dangling spokes can break, so carefully tighten them and repeat the wheel adjustment again. If the spokes are too tight they can pierce the pin or wheel rim. Craftsmen advise if you have tuned the wheel and everything suits you, but some spokes stick out from the wheel rim, you can sharpen them, for example, with a file, so as not to pierce the camera.

    As a result, I would like to say that it is better to learn how to do all this yourself once than to go to the workshop every time. Personally, I remember the workshops as would-be masters who do not have time to serve everyone, so they do everything in haste. And you are the owner of the bike and you can do everything unhurriedly, unhurriedly, literally and accurately. So go ahead and buy spoke wrenches and fix your bike wheels!

    All of the above may require special cycling tools from you.

    Pedals on the bike find out the reason here.

    Radial runout

    The “egg” is when the rim of the wheel becomes oval, that is, when one part of the rim is closer to the center than the rest. The “egg” appears, as a rule, after unsuccessful landings and is much less common than the eight.

    How to fix a figure eight on a bicycle, which is commonly called an “egg”? This is much more difficult to do than in the previous case.

    The very first thing to do is remove the tire and make sure the rim is deformed and not the tire.

    After turning the bike over, turn the wheel, while attaching an object on top. It is necessary to mark with the help of chalk that part of the rim that will lift the given object.

    After correcting the “eggs”, just as in the example with the figure eight, you need to press on the knitting needles with all your weight. to shrink them.

    Causes of deformation

    During operation, the bike experiences stresses, and they are least dependent on how you ride. Over time, there is a process of changing the geometry of the wheel rim, that is, its deformation. How quickly it happens depends mainly on the quality of the rim.

    Three defects can form on the wheel rim. These are figure eight, “umbrella” and “egg”. Let’s dwell on each of them.

    Wheel spoke adjustment

    Attention! The spoke tension should only be changed with a spoke wrench, and never with pliers or adjustable wrenches.!

    It will take patience to align a figure eight on a bicycle wheel, especially for first-timers. Tires must be completely removed.

    Check the tension of all spokes first. Often times, the rim is bent due to their overall weakening. It is easy to check this: when the spokes are clearly dangling and “obeying” the fingers like strings on a guitar, then they need to be tightened by about 1 turn over the entire wheel. If such a problem is not observed, then nothing needs to be touched: this way you can only aggravate the eight.

    We mark the defective area and proceed to the “central” spoke. the one located at the bulge. The turn of the spoke is carried out in the direction opposite to the direction of the bulge. The spokes on the sides of it are loosened. With a figure eight for three needles, the straightening scheme is as follows:

    • Tightening the central quarter turn key.
    • Weakening of the outer needles by an eighth of a turn: the weakening force is half the tension in the center.

    Eliminating the little eight

    With an eight for 7 spokes, wheel repair is done as follows:

    • The center is pulled half a turn.
    • Weaken two spokes (second and third) on the sides by ¼ turn of the key.
    • 1/8 tightens the fourth and fifth needles.
    • The sixth and seventh (extreme) needles are loosened by 1/8 of a turn.

    Straightening the Big Eight

    The alternation of pulling and stretching is carried out in such a way that the outer needles on the figure eight are loosened. To check the result, the wheel is hung on the bike and tested for residual curvature. If the figure eight is bent in the opposite direction, you should remove all tension and increase the tightening torque on the loose knitting needles and repeat the procedure again, but with less tightening and loosening forces.

    Despite the fact that you have to tinker a lot, you can achieve the ideal result. straightening the wheel to an even circle. And if the first time the work may take too long, then with the subsequent occurrence of the eight, the repair will go much faster. Now, when a defect appears on the wheel, you can not put the bike aside, but quickly adjust the spokes yourself and resume trips.

    Sometimes the figure eight can be seen with the naked eye, sometimes to identify it you need to carry out a simple procedure with a crayon or a marker, which is described below.

    First of all, you need to understand why the figure eight is formed. Poor rim material, riding on uneven surfaces, maneuvering and hard braking, regular bumps and bad jumps, and most importantly, loose or too tight spokes.

    There are several types of deformation:

    • The figure eight is the most typical deformation, when part of the rim is bent and goes out of the plane of rotation of the wheel;
    • Egg. the wheel is flattened and is not a circle, but an oval;
    • Umbrella. the rim of the wheel is not located in a plane passing exactly in the middle between the tips of the hub; at the same time the bike tends to go to the side.

    To fix a figure eight on a bicycle wheel, use:

    • Spoke wrench for loosening or tightening;
    • Crayon or felt-tip pen for drawing on the wheel rim.

    Eight definition

    To accurately align the rim, you need to locate the bend correctly. This can be done in two ways:

    • Visual;
    • Using a label.

    The most traditional method of troubleshooting that every young cyclist in the yard has experienced is by visual inspection of the wheel.

    To do this, turn the unit upside down and turn the rim strongly. At speed, you can clearly see the curved section.

    The main thing is to twist it harder. However, having identified the defect, it is necessary to accurately remember the area or to abruptly stop the wheel with your hand so as not to lose the place of curvature.

    This method has its drawbacks. Chief among them is the precariousness of our eyes. They cannot always identify small eights, especially if there are more than one curved sections.

    Another disadvantage is memorizing the damaged sector. Therefore, this method can be used when you do not have tools at hand or you are on the road.

    The second method is more accurate. It consists in setting marks on the curved section of the wheel. But, if for visual inspection it was not required to remove the tire from the rim, then with this method of determining the defect, it is necessary to release the wheel.

    With the bike turned upside down, roll the curved rim and slowly bring a chalk or marker to the back of the rim. The convex part will touch the chalk and the mark on the curved sector will be set.

    Continue to slowly move the crayon towards the wheel until it traces an outline around the entire radius. This is necessary to identify less noticeable eights. The places of the outlined outline where the chalk mark becomes thicker, and there is a figure of eight.

    This method of determining a malfunction requires more time and preparatory work, but thanks to it you will be able to more accurately determine even minor changes in the shape of the wheel.

    Causes and types of defects

    The most common types of bicycle wheel defects are figure eight and egg. The occurrence of deformations is facilitated by the active operation of the vehicle and intensive driving on uneven bumpy roads.

    You can identify and correct these types of deformities on your own, without resorting to the help of a qualified specialist. It is quite easy to diagnose the presence of defects. To do this, turn the bike upside down, placing it vertically.

    Next, you need to spin the problem wheel by rotating it around the axis. As a rule, the figure eight is visible to the naked eye. If we are talking about a slight deformation during the rotation of the wheel (if the figure eight is not visible, upon first examination), a characteristic clicking sound will be heard.

    Correction methods

    You don’t need any special skills to fix a figure eight on a bicycle wheel. All you need is patience, neatness and a dedicated spokes wrench.

    But first, it should be noted that there are two ways to fix it:

    • Power;
    • Through the adjustment of the spokes.

    Defect elimination tools

    To repair your vehicle yourself, you will need the following tools:

    Straighten a bike wheel with the simple “Gt” method (truing)

    • marker or chalk;
    • plastic assemblies for dismantling the tire;
    • spoke wrench.