How to remove a figure eight on a bicycle wheel with your own hands

Bicycle wheel figure eight, egg and umbrella fix

Correcting the figure eight and other wheel defects is not difficult, but a very painstaking task. For everything to work out, it takes not so much skill as perseverance and patience. Before you start fixing the figure eight on the wheel, prepare the following:

  • The wheel itself. it is better for a beginner to first fix a wheel on which there are one or two eights, otherwise he may get confused;
  • A piece of chalk or a white marker. to mark places of curvature;
  • Spoke key. it is important to choose the key exactly according to the size of the spoke nipples;
  • Wheel straightening machine. is needed only in especially difficult cases, the wheels on which there are few eights can be fixed without removing the wheel from the bike.

Fixing a figure eight on a bicycle wheel

To find the figure eight, spin the wheel and slowly move the crayon to the wheel rim. As the crayon starts to touch the rim, remove it and the place where it left the mark will show the direction and place of the figure eight.

Next, we start fixing. weaken the tension of the knitting needles on one side and tighten on the other. But the weakening of the tightening of the knitting needles must be carried out carefully and proportionally, constantly making sure that an egg does not form.

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There are several options for eights, then I will describe which knitting needles should be used to fix:

If the figure eight is formed between two knitting needles. one knitting needle should be slightly tightened, and the other should be loosened by the same amount.

If the figure eight formed opposite some kind of spoke. the knitting needle, opposite the figure eight, must be tightened by a quarter of a turn, and the knitting needles adjacent to it should be loosened by one eighth.

The figure eight formed opposite several adjacent spokes. it is necessary to tighten the knitting needle located closer to the center of the figure eight stronger than all the others (by half a turn), then. the farther from the central one, the weaker it tightens / looses the rest of the knitting needles.

After adjusting the rim, we spin the wheel again and check, if the figure eight is gone or decreased, then everything was done correctly, and if the figure eight increased, we return the nipples to their original position. Then you need to carry out the same operations, but vice versa. the knitting needles that you twisted must be unscrewed, and accordingly those that were unscrewed should be tightened.

Umbrella fix

Adjust and install the umbrella gauge on the wheel axle. His feet should touch the rim, and the center mark should be aligned with the wheel axis and touching it.

Next, turn the wheel over. Without reconfiguring the umbrella, attach it to the other side of the wheel. If his feet do not touch the rim, and the center indicator is in contact with the axle, then the spokes on this side of the wheel must be tightened. If his feet touch the rim, and the center indicator does not reach the wheel axis, then the spokes on the other side of the rim must be tightened.

Fixing an egg on a bicycle wheel

The first step is to find the place where the egg appears. We take the chalk, spin the wheel and slowly bring the chalk to the rim outside the wheel. As soon as the crayon begins to touch the rim, an egg turns out there.

To fix the egg, the knitting needles must be tightened equally on both sides of the rim, otherwise a figure eight may form. The knitting needles located closer to the center of the egg need to be tightened more, it turns out if the central knitting needle is pulled up by half a turn, the adjacent ones need to be tightened only by a quarter of a turn.

Do not be upset if you fail to fix the eight the first time, I repeat, this work requires perseverance. Experience is also important, the more eights you fix, the easier it will be to fix the next.

Prevent when correcting eights

Do not allow individual spokes to loosen, otherwise they may break while riding. If, after tuning, there are still loose spokes, they should be tightened, and together with them, the adjacent ones (but weaker than the previous one) should be tightened, then the wheel tuning should be repeated.

Do not overtighten the spokes as they may damage the rim. If, after tuning, the spoke is overtightened, loosen it and loosen the adjacent spokes (but weaker than the previous one), then repeat the tuning.

Umbrella repair

To fix the umbrella, it is better to use a special device. an umbrella gauge, 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, tighten the spokes from the other side. It must be remembered that on some bicycles the umbrella is deliberately displaced (for example, on multi-speed ones).

Of course, to eliminate the bends on the rim, you can contact 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.

An 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 an eight on a 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. Add bumps in the road. 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 the 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 can you 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 eight. By spinning more strongly and bringing the chalk closer to the rim, you can also determine the boundaries of the curvature.

How to fix the figure 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 straightening; tightening and loosening the wheel spokes.

The necessary set of tools to eliminate deformation: 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 more deformation. There are several ways in which it can be removed.

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Power straightening Having considered 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 in place. Although in case the wheel let you down somewhere along the way and the figure eight happened suddenly due to, for example, hitting a large stone, force straightening is the only possible way.

Adjusting the wheel spokes Correct spoke tension often affects the ride quality of your bike. 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 has a size of three knitting needles, the following actions are taken: tightening the central knitting needle by a quarter of a turn with a wrench; slight loosening of the outer needles (half the tension in the center).

If the figure eight has a size of seven spokes, the algorithm of actions 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 extreme spokes of the figure eight are loosened. After the procedure, the wheel is set in place and tested for possible distortions. If the figure eight is bent in the opposite direction, all tension is eliminated and the 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.

Changing the spokes 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.

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Figure 8 around an object

Work on a set of spokes: it is necessary to lubricate the spoke threads 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 faces 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 tensioning the spokes, tighten all the nipples equally. Then you need to start the process by screwing each nipple one turn. If trembling remains in the needles, the tension increases. We install the wheel for checking and remove all defects such as the figure eight.

Eliminating Radial Runout An oval egg-shaped 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. It is much more difficult to fix such a breakdown than a regular figure 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:. release the tension from the central 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 a figure of eight requires considerable experience, the process is characterized by its own difficulties. After fixing the eggs, you need to press on the knitting needles with all their weight, as in the above scheme. to shrink them. Editing an 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.

Summing Up The 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.

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Elimination of defects in a bicycle wheel

When the area of ​​curvature of the wheel is found, it’s time to start straightening it. Every owner of a two-wheeled vehicle can do it with their own hands, especially since such problems can arise with enviable regularity. There are two ways to eliminate the figure eight on your own:

  • Power straightening, or knee, as cyclists say.
  • Wheel Spoke Tightening and Loosening Method.

The process of repairing an egg-type rim defect

Unlike figure eight, we pull the knitting needles in the right direction on both sides! Otherwise, the repair of the ellipse will lead to the emergence of the already known figure eight. For example, if the center needle needs to be pulled up by 1/4 turn, then the next. by 1/8.

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.

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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.

At the third stage, you need to simultaneously trace three directions: starting from the central spoke, release the tension; pull the knitting needles next to it by the same number of revolutions so that there are no eight; and tighten the spokes at the opposite end of the wheel to prevent the appearance of an egg in another place. In order to fix the figure eight, experience is required, since this process is quite complicated. It can be started over if something did not work out, first by loosening, and then pulling all the needles at the same time.

After fixing the eggs, in the same way as in the example with the figure eight, you need to press on the knitting needles with all your weight. to shrink them.

Eight deformation. what is it

Bicycle wheel curvature is associated with a misconfiguration of the rim. In other words, the wheel is no longer round. A common variant is the so-called figure eight, when there is a deviation of part (or several parts) of the rim from the plane of rotation. When rotating, these areas describe trajectories in the form of eights around the central axis of rotation. When riding a bicycle, this defect is expressed in wobbling or wobbling on the go.

Riding with eights is possible, but it is unlikely to be a pleasure. In addition, deformed wheels are less resistant to stress, which will lead to further distortion and complete unsuitability of the rim. Can I fix a figure eight on a bicycle wheel myself? Yes, and it’s not difficult at all. How to do this in the article.

How to straighten a figure eight on a bicycle wheel

This question is relevant for many. A figure eight on a bicycle wheel is the most common problem with bicycle deformation. The main cause is loose knitting needles. Consider the issues of the correct tension of the knitting needles, the types of eights and how to fix them. It should be said right away: for preventive purposes, so as not to wonder too often how to fix the eights on the wheels of a bicycle, you need to tighten the spokes at least once a season.

Eight deformation. what is it

Bicycle wheel curvature is associated with a misconfiguration of the rim. In other words, the wheel is no longer round. A common variant is the so-called figure eight, when there is a deviation of part (or several parts) of the rim from the plane of rotation. When rotating, these areas describe trajectories in the form of eights around the central axis of rotation. When riding a bicycle, this defect is expressed in wobbling or wobbling on the go.

Riding with eights is possible, but it is unlikely to be a pleasure. In addition, deformed wheels are less resistant to stress, which will lead to further distortion and complete unsuitability of the rim. Can I fix a figure eight on a bicycle wheel myself? Yes, and it’s not difficult at all. How to do this in the article.

Editing the Umbrella

There is such a thing as an umbrella. This is when the wheel rim has moved to one side and is not perfectly aligned with the center of the hub. The amount of this offset will depend on the design of the frame itself and the type of brakes. This malfunction often occurs in the case of improper wheel assembly.

The umbrella straightens in the same way as the figure eight. On the one hand, you need to tighten the knitting needles, and on the other hand, loosen the same effort. Unlike how to straighten the figure eight, when straightening the umbrella, the effort should not fade, but should be uniform around the entire circumference.


The basis of this method is to align the rim using brute force. You can fix the figure eight on a bicycle by following the step-by-step instructions:

  • remove the wheel from the frame, do not dismantle the tire;
  • we wrap the tire on both sides, turn the wheel towards us with a deformed section;
  • we put our knee to the very center of the figure eight and press with force away from ourselves.

Optimal grip. 60 degrees on both sides of the center of curvature.

To straighten the rim in this way, you need to have physical strength. To correct a large deformation, it is better to call an assistant who will hold the bicycle wheel, pressing it to the floor. If you apply enough force, the curvature will smooth out.

Such an edit is perfect on the road, away from the village. However, the method has many disadvantages:

  • eliminating small curvatures will not work;
  • not all rims are corrected by force;
  • inconvenience in work;
  • you can accidentally bend the wheel rim in the opposite direction.

You need to act carefully and skillfully, otherwise you can achieve the opposite effect.

How can you fix a figure eight on a bicycle wheel, basic methods

Cycling is a great pastime with family or friends and has health benefits. But while walking, you can accidentally run into a bump or fall into a hole. The main force of impacts falls on the wheel, as a result, it can deform, which will lead to various problems with the rim. Not all users know how to fix a figure eight on a bicycle wheel on their own. There are several main ways. Mastering the technique will not be difficult.

How To Build Bicycle Wheels the Easy Way

Needle lift

The method consists in adjusting the spokes: tightening or loosening. The work to fix the figure eight on the wheel is performed using a spoke wrench:

  • with an eight between the knitting needles. tighten the first knitting needle slightly, and loosen the second in proportion;
  • curvature opposite one knitting needle. the knitting needle that is opposite the defect is pulled up by a quarter, and the neighboring ones are weakened by one eighth;
  • if the figure eight on the wheel is opposite several spokes. the spoke closest to the center is pulled in half a turn. the farther from the center, the more it is worth weakening or tightening the other spokes.

It is not recommended to use pliers when adjusting, as they can accidentally erase the edges of the nipple.

In case of significant deformation of the wheel rim, it is better to start checking all spokes for tension. Carry out prevention: tighten or weaken the elements. Correction of the figure eight is carried out by the adjustment method:

  • mark the curved area with chalk;
  • find the center spoke, which is at the largest point of curvature;
  • loosen the side where the rim is bent and pull on the opposite side at the same time;
  • loosen the central knitting needle by half a turn. turn it three quarters, and return it back one quarter;
  • pull the adjacent spokes as much as the central spoke was weakened and, gradually moving, get to the edge of the figure eight;
  • next spokes. tune with fewer revolutions.

When the repair is completed, you need to check the wheel for curvature by the contact method.

Eliminating the figure eight on a bicycle by adjusting the spokes can seem like a daunting and time-consuming process to beginners. However, this method is very accurate and will allow you to get rid of even the most difficult defects. As a result of training, the work will not take much time. It should be remembered that even the most accurate and experienced cyclists form an eight, so you need to know how to repair a wheel with your own hands.

Elimination methods

Even if there is no experience in such matters, acting carefully and following the rules, you can fix the figure eight on the wheels of a bicycle with your own hands at home. Before starting work, you need to prepare tools:

  • key for knitting needles;
  • chalk or marker for marking defects;
  • plastic assemblies for mounting and dismounting tires.

There are two methods of dressing a bicycle wheel: power and spoke tightening. Each of them has its own strengths and weaknesses.

Spoke wrench Bicycle assemblies

How to fix a figure eight wheel on a bicycle?

Of all the constituent elements of a bicycle, the most conservative is the spoke wheel. This type of wheel fits most bikes and is simple in design: a center hub, rim and spokes that connect the rim to the pivot. During the operation of the bicycle, the wheel is subject to static, dynamic and shock loads, as a result of which changes in its shape can often occur.

Eight deformation. what is it

Bicycle wheel curvature is associated with a misconfiguration of the rim. In other words, the wheel is no longer round. A common variant is the so-called figure eight, when there is a deviation of part (or several parts) of the rim from the plane of rotation. When rotating, these areas describe trajectories in the form of eights around the central axis of rotation. When riding a bicycle, this defect is expressed in wobbling or wobbling on the go.

Riding with eights is possible, but it is unlikely to be a pleasure. In addition, deformed wheels are less resistant to stress, which will lead to further distortion and complete unsuitability of the rim. Can I fix a figure eight on a bicycle wheel myself? Yes, and it’s not difficult at all. How to do this in the article.

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.

Editing Bicycle Wheels: How to Remove Eight, Egg on Wheel

The spokes connect the hub and the rim to each other, holding it and at the same time evenly distributing the load on the latter and transferring back the shock loads from the road through the hub with the axle. on the frame. For connection, there is a hook with a head at one end of the spoke, and at the other. rolled thread (cut would very much loosen the spoke). In addition, the spokes in the wheel are not located along the radii, but along the tangent to the bushings, so that they mainly work in tension.

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It is not at all a fact that even on new wheels all the spokes will be tensioned as expected, especially on relatively cheap models. But even if everything is fine in this regard, then after running in, you will probably have to tighten the spokes. And if adjusting the tension of the spokes. relatively simple work, then troubles and more serious often happen, and when eliminating them, you cannot do without broaching the spokes.

The most common wheel damage after punctures is figure eights. end bending of the rim (local deviation from the plane of rotation) during a sharp collision with an obstacle or as a result of weakening of the spokes during prolonged use without tightening them. Visually, this is detected by the wobble of the wheel during rotation (the cycloidal curve of the extreme point of bending, when viewed from above, writes out a narrow figure), Often, a part of the rim deviates (bends) so much that it starts to touch the brake pads (or, in the absence of a brake, the tire on the fork blade) and interfere with spinning the wheel.

There are some easy ways to save a wheel. Simplest. straighten the resulting figure eight, which is called through the knee. I have used this folk technology many times.

Turning the bike over and setting it on the ground, leaning on the handlebar and seat, I slowly turn the wheel and find the most convex (deviated) place. It is even better to search for this place with a piece of chalk: only now you need to spin the wheel faster, and slowly bring the chalk from the side of the fork blade (from the side) to the rim to the teal. places of their contact. I put my knee in here, and with my hands I grab the tire with a rim on the left and right and straighten it with effort. I scroll again and if I find another bulge, then I straighten it again. Usually, a few such manipulations are enough to reduce the curvature of the rim, and the wheel has already entered the fork with lateral clearances, without touching the feathers during rotation. After such a repair, it is already possible to ride a bicycle, but not very pleasant: it seems that the wheel seems to dangle on the axle, and at high speed the steering wheel even begins to shake.

To straighten the figure eight completely (in a circle), you will have to use a different method. the constriction of the spokes, taking into account the emerging curvature of the rim. Spin the wheel and mark the most prominent points of the rim. Then, here, weaken the outer row at the two or four nearest knitting needles, and on the inner row. pull the nipple one turn. By gradually loosening and twisting the corresponding spokes, you can achieve sufficient flatness (flatness) of the rim without disassembling the wheels.

After several such repairs or an unsuccessful landing, a radial displacement of the rim and the appearance of ovality (eggs) is possible.

To detect ovality, the bicycle is also turned over and with a piece of chalk, bringing it closer from the crown of the front fork while slowly scrolling the wheel, determine the ovality. To eliminate it, loosen in the hollow and pull all the spokes in the convex place. Then tighten everything evenly to normal. You also need to strongly squeeze in pairs all the spokes in the left and right rows and stretch the weakened ones again.

The end result is an almost round wheel.

Before the next spring-summer season, you should align the wheels with a bare rim, and, if necessary, a more thorough straightening.

How To Remove And Fit Road Bicycle Wheels

The most difficult wheel repair. Its complete disassembly and subsequent assembly. On the knee, such repairs cannot be done. An assembly tool is required for accuracy. The simplest jig is made on a suitable sheet of plywood or chipboard. A hole is drilled in the center along the diameter of the wheel axis.

Steel band rim options: 1. for a tire with a wire bead; 2. box section; 3. without internal cavities

After completely disassembling the wheel (removing all the spokes), the rim is straightened for steepness by adjusting the rim mowing line with an even drawn circle on the surface of the sheet. A well-aligned rim should be absolutely round and flat.

When detecting spokes, pay attention to the condition of the thread, anti-corrosion coating and wear of the hook neck.

To facilitate the work, the threads of the spokes and parts of the rim in the places of contact with the washers of the nipples (around the holes) are lubricated with grease or machine oil.

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The assembly begins with the spokes filling the sleeve body in rhythm with the head on the left (outside). head on the right (inside). Here you need to pay attention to the following: if the holes in the hub flanges have a countersink on one side, then the spoke head should be on the opposite side. countersink is designed to bend the spoke. In addition, upon closer examination of the hub, one cannot fail to notice that the holes on the flanges of the hub for the spokes are offset relative to each other by half a step.

Then the bushing with the axle is screwed into the center of the device, the spokes are distributed over four future rows, a bare rim is placed.

When dialing the first nine spokes, you must insert them into the corresponding holes in the rim (those that are offset to the flange where the spoke is inserted). The spoke should be screwed to the nipple adjacent to the valve (or, in its absence, with a hole for it). Looking ahead, I note that the finishing spoke of the last row should be located on the other side of the valve and not intersect with the leading spoke. Otherwise, it will be difficult to connect the pump hose to the valve.

Wheel on the slipway: 1. rim; 2. sleeve; 3. coordinating support (4-6 pcs.); 4. centering sleeve (2 pcs.); 5. wide washer; 6. fastening the wheel to the slipway (M8 bolt with nut and washer); 7. fastening the support to the slipway (screw, set); 8.slip (particle board or plywood)

When the threaded nipples are first baited, the direction and rhythm of the wheel spacing should be clearly defined. For example, in the rear wheel of an ordinary adult bicycle. 36 spokes. Divide into four rows. it turns out nine spokes in a row. The first lower one is baited through three holes on the fourth. Second row. in the opposite direction, starting with the middle empty hole and on to all the middle ones. Third row. in one direction with the second row into a free hole along the way and further. The fourth, last top row has the same direction as the bottom first. It spokes into the remaining holes of the rim.

The traditional set is called semi-tangential, when the direction of the spokes approaches the tangent to the hub flange. This position makes the wheel more rigid in relation to the torque (and braking). Most of the wheels are assembled into three crosses (but they can be two, four, or even five). This means that each spoke intersects with three others coming from the same hub flange.

It remains only to evenly tighten all the knitting needles. This should be done at random, and not in a hurry. If the ends of the spokes protrude from the nipples into the rim, then they must be filed.

The prepared wheel is removed from the device and put into the bicycle fork.

Now, if the rim breaks (and this, unfortunately, also happens) or the bushing is worn out, feel free to buy new ones, disassemble the wheel and replace.

It is possible to replace the standard hub or rim in the wheel with non-native ones. Then there may be a discrepancy in the number of spoke holes at the rim and hub. Not scary. There will simply be fewer knitting needles and the rhythm of the knitting will be slightly out of place. The safety factor is usually sufficient.

There are often cases of designing equipment with bicycle wheels, when reinforcement of the hub or rim (or both) is required. Then a new extended sleeve is machined. The spoke flanges also increase in diameter. you can estimate it by trying on a regular spoke to a regular rim or by drawing a simple drawing. The wheels of the bogie with a widened bushing and on conventional ball bearings (and not standard ones, without cages) will be more reliable and will last longer. Similar wheels are used in the manufacture of such exotic ecotransport as velomobiles and pedicabs.

In the case of large bushings in combination with small diameter rims, use fewer crosses (no more than two) to avoid bending of the spokes at the nipple.

Motorcycle and moped wheels are designed in a similar way because both are. there is a derivative of bicycles, only with an engine. Therefore, their repair is identical.

Rim deformations: a. rim without deformation; b. figure eight (part of the rim goes beyond the plane of rotation); in. egg (the rim is not round, part of it is concave or convex, or both); d. umbrella (the middle of the rim is offset from the middle of the hub, usually the result of improper wheel assembly)

Elimination of rim deformations without complete disassembly of the wheel: a. correction of the eight; b. elimination of eggs