The essence of the method is the impact of brute physical force on the rim.
To eliminate the defect in this way, it is necessary to remove the wheel from the bicycle frame, but the tire and the camera do not need to be dismantled. We take the tire on both sides, turning the wheel with the bulge towards us. An ideal capture is considered to be 60 degrees on both sides of the center of the figure eight (figuratively speaking, at 10 and 2 o’clock). The knee should be close to the most convex area. With maximum effort we push in the direction away from ourselves.
If the legs are strong enough, then this operation can be performed on weight. Another option is to mount the bike wheel so that the damaged area is at the top and have a partner press the rim firmly to the surface.
If there is a good emphasis and sufficient strength, then the defect should be reduced. This method can smooth out large curvatures, but it is ineffective for a number of reasons:
- the small “eight” cannot be corrected;
- possible bending of the rim to the other side;
- inconvenient to work;
- not every rim can be repaired using force.
The method helps out well when the cyclist is on the road and needs to correct the curvature in order to get to the house or the nearest repair shop.
Correcting the figure eight
How to fix a figure eight on a wheel? Eight in this case is when some part of the rim does not coincide with the plane of rotation.
Tools that will be needed for the repair:
1) chalk, with its help we will mark the area with a defect;
3) a wheel straightening machine is desirable, but this is not necessary. The small figure eight can be removed without removing the wheels. Turn the bike upside down. in this position, you can check the correctness of the wheel relative to the brake pads.
How to fix eights on bike wheels? This process can be divided into several stages. The first step is to find the deformation. During the rotation of the wheel, it is necessary to bring the chalk closer to it. In the place where there is an eight, a trace will remain. With this simple method, you can easily determine where the deformation of the rim has occurred. At the second stage, we tighten and loosen the knitting needles, but only from a certain side. If these manipulations are performed incorrectly, you can further damage the wheel by getting a new deformation.
How to fix a figure eight on a bicycle wheel? There are several ways in which it can be removed. If it is between two knitting needles located next to each other, then using a spoke key, tighten the first knitting needle by 1/3 of a turn, and twist the knitting needle next to each other in the opposite direction, while we also loosen the clamp by 1/3.
Quite common is the case when the figure eight is located opposite one of the spokes of the wheel. Then pulling up this knitting needle should be done by ¼ of a turn, and by 1/8 of a turn it is necessary to relax the two knitting needles located next to it. It happens that on a deformed wheel, the figure eight changes the position of several spokes located next to it. This case is difficult, and you need to be very careful and adhere to the following rule: the knitting needles that are closer to the center should be tightened or loosened with more force, and the knitting needles located at the edge should be tightened or loosened with less force.
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In order to determine the correctness of the repair, it is necessary to spin the corrected wheel, and the changes should be immediately noticeable. The actions you performed were correct if the wheel became level, otherwise you need to repeat all the actions again.
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.
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 spoke wrench.
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But first, it should be noted that there are two ways to fix it:
- Through the adjustment of the spokes.
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 hard 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 weight. An alternative is to place the wheel vertically with the defective section up. This is where the help of a partner is needed. 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.
- 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.
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 on most bikes and has a simple 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.
Deformation of the “eight” type. what is it
Bicycle wheel curvatures are associated with irregular rim configuration. 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.
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:
- Strength straightening, or “knee” as cyclists say.
- Wheel Spoke Tightening and Loosening Method.
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 detection method 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.
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 line up 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.
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.
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.