How to straighten a rim on a bicycle with your own hands

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.

Eight on a bicycle wheel. fix it yourself

The spoke wheel can be safely called one of the most classic elements of your bike, as it is installed 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.

The deformation of a wheel is called a figure eight in the event that a 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 intensively 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.

straighten, bicycle, your, hands

how to identify the eight

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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

Eight bicycle wheel. determine the exact place

To determine the exact place of deformation, it is necessary to turn the bike with the wheels upward. Next, you need to rotate the problem wheel, gradually bringing the chalk or marker to the spinning rim. Where there is a figure eight, the crayon or marker will touch the rim. These places should be noted. This is how you can determine the problem area. the hearth of the eight.

There is another method for determining the focus of the figure eight using ordinary ear sticks, adhesive tape and a marker. To identify the problem area of ​​the rim, you need to stick the ear sticks with tape on the front fork feathers on both sides. The areas where the ear sticks will come into contact with the rotating rim are problem areas. It is here that it will be necessary to tighten or loosen the spokes in accordance with the algorithm described above.

Elimination of the figure eight defect is a simple process, but troublesome, you can cope with it yourself without the help of a specialized specialist. This method is flexible and suitable for different types of bicycles.

Important: after eliminating the defect, it is imperative to check the degree of tightness of all the spokes of the problem rim. This will help you avoid unexpected accidents on the road.

If you still have any questions regarding the methodology for determining the problem area and eliminating deformation, we recommend that you watch the video instruction:

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.

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 obey the fingers like the strings on a guitar, then they need to be tightened by about 1 turn around 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.
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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 knitting needles.
  • The sixth and seventh (extreme) needles are loosened by 1/8 of a turn.

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.

How to fix a figure eight on a bicycle wheel

Power straightening

To remove the bend in this way, you will need to remove the wheel from the frame. In this case, you do not need to remove the tire with the camera. Turn the bulge towards you and grab the rim and tire on both sides. With medium deformations, the optimal grip of the wheel is position 10 and 2, that is, 60 degrees to both sides of the eight. We put the knee to the most convex area and press with force from ourselves.

What position of the wheel will best allow the rim to align? If there is enough strength in the leg, then you can press on the weight. An alternative is to place the wheel vertically with the defective section up. The help of a partner is needed here. He must firmly press the wheel to the floor. After straightening, the wheel is put on the frame and checked again by the rotation method.

This method cannot be called effective for several reasons:

  • Can’t bend small bends.
  • The rim may bend to the other side.
  • Uncomfortable.
  • Low accuracy.
  • Not every rim can be subjected to simple force so easily.

This method works relatively well somewhere on the road, when the figure eight was formed suddenly due to a swoop on a large obstacle and it must be urgently straightened in order to reach the destination.

Why does an eight form on the wheel?

The malfunction occurs for several reasons:

  • During the movement of the bicycle, vertical loads are applied to the structure. Their value depends on the body weight of a person.
  • The eight appears at the moment of hitting an obstacle. For example, a cyclist might bump into a stone or curb.
  • When braking and accelerating, the vehicle is affected by lateral forces.

Gradually, the shape of the wheel begins to change and an eight is formed, which leads to the failure of the product.

What methods do cyclists use to eliminate the figure eight?

In the process of repairing a bent rim, several operations must be performed.

The bike owner must identify the type of malfunction and where the curved section is located.

To this end, it is necessary to turn the vehicle over and spin the wheel. After identifying the defective area, you can begin to straighten the wheel.

You can get rid of the figure eight in 2 ways:

  • to correct a defect along the way, you can resort to force rectification;
  • Needle lift is a more accurate method that will require a lot of tuning.

Bicycle wheel defects elimination options

Even without special skills, it is easy to eliminate the curvature. To do this, you need a special key for the knitting needles, as well as accuracy and the ability to do the work thoughtfully and slowly. There are two ways to remove the figure eight on a bicycle wheel:

Determination of curvature on wheels

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

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 vertex 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.

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 obey the fingers like the strings on a guitar, then they need to be tightened by about 1 turn around 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.

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 knitting needles.
  • The sixth and seventh (extreme) needles are loosened by 1/8 of a turn.
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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.

Contact method

For more accurate troubleshooting, you can use the contact method:

  • The user must, at the time of spinning the wheel, bring the chalk to the rim. This method allows you to determine the top of the defective area.
  • After the procedure, a greasy line drawn with chalk will appear on the deformed part of the wheel.

Causes of deformation of the type eight

When creating modern bikes, manufacturers use the latest technologies, but the design of the discs still remains outdated, spoke. Small curvatures do not lead to tangible troubles when driving, they can be tolerated for a long time. Sequential deviations can lead to dangerous situations, such a malfunction must be eliminated.

There is an opinion that the eight on a bicycle is a consequence of active and careless riding. Driving over bumps, uneven surfaces, unsuccessful jumps, dashing turns lead to deformation. These factors inevitably affect the geometry of the rim, but they are not the only reasons for the formation of the figure eight. During operation, the driving style has the least effect on the appearance of distortions.

The vertically directed load occurs already when you get on the bike. Abrupt braking at speed leads to deformation, the figure eight begins to form. Biking and cornering at high incline speeds only exacerbate the problem.

This is especially true for those who like to perform jumps on a bicycle. Not all bike models are equipped with special shock absorbers that partially compensate for the load upon landing. The jump irreversibly changes the geometry of the wheel of the bicycle, it is not easy to eliminate such a defect.

Sloppy driving cannot explain all the reasons for the emergence of the eight. Even if you ride very carefully on a perfectly smooth road, deformation will be observed over time. this is a characteristic feature of bicycle operation. The more kilometers traveled, the more often there will be a need to adjust the wheels of your bike.

A high-quality rim, made technologically correct, significantly reduces the possibility of forming a figure eight. On cheap models of bicycles, defects may already be present at the time of purchase, respectively, repairs will need to be done almost immediately after the start of operation. On a poor quality rim, curvature develops after the first few rides.

How to upgrade your bike

Sooner or later, every cyclist comes to the fact that he has an irrepressible desire to supplement his model with new elements. A lot of material has been written and a lot of words have been said about how to improve a bicycle, however, in order to understand the nuances of this process, you still need to pay attention to the opinion of experts. You must always remember that the issue of safety for a person should always come first, no matter what goals he pursues, deciding to upgrade his iron friend!

Where to start and how to quickly achieve the desired result

Before starting to make metamorphoses, it is necessary to determine not only what specific changes the bicycle should undergo in the final version, but also to understand the sequence of their implementation. Pay attention to the bicycle fork: here you will definitely need to know the size of the “glass”. the diameter of the ring where the fork is inserted. The most common size is considered to be one point one-eighth of an inch. The shape of the “glass” is conical, then the diameter of the top of the ring may differ from the bottom.

Important! These dimensions will be required when selecting a fork with a suitable stem.

If you want to effectively pump the plug. choose “air” (for example, “Recon Gold”, or better “Rebu”). The air fork is very easy to use, as the pressure can be adjusted to adjust the stiffness. These forks are lightweight and reliable, and also do the little things well. Their impressive advantage is that they do an excellent job of mitigating impacts on both medium and large obstacles. They are also less sensitive to sudden changes in temperature, and also have increased wear resistance.

From simple to complex elements

Now we turn to the bushings, and if we take it on a larger scale, then we will continue to talk about replacing the wheels. This is a very sensitive topic, as it requires you to treat it with special attention. Bicycle wheels are a very important element, since they constantly have to come into contact with different surfaces, depending on the place of use, which often becomes the reason for repairs.

A significant element of the wheel is the number of spokes. According to the standard, there should be 32 or 36 pieces, but there are more. Mountain bikes may have fewer, and segmented flange hubs, which are often found on these models, require special straight spokes. The quality of the bushing depends on the type of machining and bearing seals. The more precisely the part is made, the softer their rotation will be.

Attention! No matter how good the quality of the bushing is, do not forget that frequent and prolonged ingress of moisture in the absence of lubrication will quickly render them unusable.

Before deciding to install higher level brakes, you can try to retrofit them in a different way. It is only necessary to increase the radius of the rotors, since in practice this is often enough for the brakes to work much more efficiently. This will save you a lot of money.

Another part that often helps to improve the bike in interesting ways is the rear derailleur. If a cable with a loop is provided in the modification of the switch, then when replacing it with a cable with a vertical position, it will be possible to achieve an improved result. Namely, gear changes will become clearer and more natural, since there is no loop in such a mechanism.

Change bike tires

There are several types of tires in the cycling world:

  • clincher (household);
  • tubeless;
  • one-tube;
  • solid (cast).

The most widespread are clincher tires, and they should be used. Pay special attention to the type of nipple, since the rim is designed to replace the chamber with a specific type of nipple. Otherwise, you will have to re-drill the hole to enlarge it to the required diameter. Replacing rubber tires with a lighter synthetic material will greatly improve the ride quality and comfort. All this can be done at home.

HOW TO MAKE YOUR RIM STRAIGHT. FIXING A BENT WHEEL

Choosing a modern material, as well as changing the old type of tires, will significantly reduce the number of punctures on the road. For long-term use, tires are ideal, the sides of which are made of flexible Kevlar cord.

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An overview of the presented standards and nuances will help you make your bike much more interesting in terms of operation with your own hands. We wish you only the pleasure of driving!

light on the bike. so every ride is different

Light tuning has been popular in big cities for many years. And for good reason. the backlight led not only looks spectacular in the dark, but also protects the rider on the road. Of course, it is not at all necessary to turn the bike into a Christmas tree, like the aliens in the Men in Black tape. But some elements really come in handy and help you stand out.

DIY bike tuning. 3 easy steps

The concept of tuning came from the world of cars and means the improvement of transport. The goal can be different. to improve ride comfort, improve technical parameters or appearance. But if it is problematic to upgrade an iron horse without the help of professionals and special equipment, modifying a bicycle with your own hands is a feasible task for a cyclist. How to do this. in the article.

Flashlights and headlights

The headlights of bikes such as the MAGNUM M come in a variety of designs and designs. They are also distinguished by the method of installation and type of lighting.

The basic types of bicycle headlights are front and rear. The fact that a vehicle should be equipped with them has practically become the norm. After all, this is the main lighting that makes the cyclist visible on the road.

Headlights are used to illuminate the path and indicate their presence at night. Not all types of lights are suitable for this: LED lights do well, which are affordable, and xenon. these will cost more.

The taillights will provide safety at night or in bad weather. they will help the cyclist to be identified by those who are riding behind. Such lights should work in two modes. flashing and constant. As a rule, LED lights are used for these tasks.

A new feature in light tuning is turning headlights. Their use to indicate maneuvers is more comfortable and safer for the cyclist and other road users.

LEDs and neon will help make a bike like ONTARIO SPORT brighter and more attractive. The LED strip is a flexible strip on which the LEDs are located at an equal distance. It is sold in bobbins, and it is easy to divide it into the desired lengths. The long ones are suitable for frame upgrades, and the short ones can be installed on wheel rims or spokes.

Neon tubes will appeal to those who prefer soft, slightly diffused light. Such illumination looks aesthetically pleasing, but you cannot see it from afar. In addition, tubes are easily damaged and require more LEDs to operate.

The use of reflective elements is necessary, first of all, for the safety of the biker himself and other vehicles. So, both pedestrians and cyclists are advised to wear clothes with stripes or prints that reflect the light of car headlights in the dark.

To become more visible on the road, reflective stickers on the bike will not interfere with the biker. You can stick them on the frame, rim or fork. In addition to safety, this design looks stylish and discreet in the daytime.

Phosphor Stripes Phosphor stripes are great for highlighting or spotlighting the controls. You can choose a contrasting color with the main color, or vice versa. in tone.

Bike styling

The easiest way to update the led and give it personality is to paint. Even an old Stork can transform a fresh color, let alone the fashionable Leon XC 80.

How to True (Straighten) a Bicycle Wheel

  • sandpaper;
  • primer;
  • solvent;
  • paint of the desired color in cylinders.

First, you need to scrupulously wash the frame, twisting the rest of the parts from it. After. remove the old paint using a solvent. Irregularities and roughness should be sanded with sandpaper, and then the surface for painting should be degreased and allowed to dry completely.

As before painting the walls, the frame needs to be primed. Better. in 2-3 layers, while each previous layer must dry before applying the next. And only after the last layer has dried, paint is sprayed onto the surface. The manufacturer usually indicates the drying time on the cylinders.

Important: You should take care of good ventilation in the room where the staining is carried out.

Additionally, you can decorate the frame on a model like the Cross 1300 with your favorite designs. To do this, you will need special stencils, which can be purchased at specialized retail outlets or made yourself on self-adhesive film.

Wheels are painted in the same way as frames. But it is imperative to close the sleeve and knitting needles from the paint. Also available for DIY styling:

  • change of tires;
  • hauling wheels with a film;
  • equipping them with blades made of plastic or plywood.

Those looking for a big change should look out for cast wheels with a robust and eye-catching design.

Additional accessories. we make the bike even more convenient and practical

To make a model like the Discovery Canyon as comfortable as possible in everyday use, you can gradually add the necessary accessories to it. Details like these will also make your rides safer and give your bike a special charm:

Fenders will protect the rider from dirt on the road or in bad weather. If you drove without them, you can put new ones. Alternatively, replacing relatives with more suitable design and materials.

The rearview mirror is no longer the prerogative of motorists. On the track, this accessory will help to monitor the situation and correct maneuvers in time.

Those who prefer to move on the sidewalks need to get a horn or bell. It’s much more impressive than screaming back and forth every now and then!

Only those who try to gently lean the bike against benches, walls and fences several times every day will truly appreciate the value of the peg.

A trunk or a retro basket is not only useful in the household. These accessories create a complete and holistic image of the bike and its owner.

For long-distance travelers without water, no way. Yes, and in the hot summer you won’t go far without her. Therefore, a bottle or bicycle flask holder is a priority purchase.

Experienced bikers will need a bike computer. The gadget will help you get and analyze the most useful information about the distance traveled and physical activity.

Of course, for those who take out a bike from the attic a couple of times a year, tuning it is an unimportant task. But cyclists who can no longer imagine life without riding their favorite bike will enjoy the do-it-yourself upgrade. After all, you can arrange the lead exactly as you want, and not explain the reasons for your choice to anyone. Therefore, it is worth doing improvement at least in order to create something special, unique, reflecting an attitude to life.