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.
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.
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.
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.
This is how the curvature of the rim is recorded.
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.
How to straighten a figure eight on a bicycle
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.
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.
So, 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.
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 and tear. But that’s not the only reason a wheel can break. When the cyclist sits on the bike, the wheels are already giving in to the load 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, you need to 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.
How to fix a figure eight on a bicycle wheel
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 will tell you simply. 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.
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 OK. Simply place the bike upside down on the saddle and on the handlebars with the wheels up. Spin the problematic wheel, as you think, (spin it in the sense of rotating it around the 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.
Types of bends that are possible in principle:
The eight wheel tilted to the left, the dotted line shows how it should be.
The wheel is curved like an egg. The dotted line shows how it should be.
Umbrella curvature. Dotted line as it should be.
General algorithm for eliminating problems with a deformed wheel
The general algorithm is as follows. we determine 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. weaken 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 it is 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. We loosen the spokes on one side of the wheel, and tighten them on the other. 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. To perfectly align the figure eight, you will have to patiently and painstakingly perform all of the above actions slowly (i.e. we twist a little).
How to Tighten Your Bicycle Spokes
Eight larger. to be treated in the same way as a small one.
The wheel is flattened by an egg, the straightening algorithm is slightly different. We only pull up the right side.
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 (crayon 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 scotch tape from both sides and, just like with a crayon, rotating the wheel, gradually bring the ear sticks to the wheel rim and the places where they begin to clearly touch the rim. mark 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 bring the chalk from the outside of the rim. where the tire with the camera should be.
As you can see from the above, the elimination of the figure eight on a bicycle is not a very difficult process, and what is most pleasant is that it is accessible 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 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!
Pedals on the bike find out the reason here.
How To: Tighten Your Spokes. TransWorld MOTOcross
See more about fixing the figure eight on a bicycle in the video below so that everything finally fits in your head with a clear picture.
Types of spokes for bicycles
Bicycle spokes are divided into three large groups, which differ in their technical characteristics:
Note: butting is a reduction in the thickness of the spoke in the middle (central) part of it, although towards the edges the spoke “acquires” its declared thickness. Thus, manufacturers reduce the weight of the spoke, while not at all reducing its quality and functionality.
Step Three. Tensioning the Spokes
This step is considered final and easy to complete. You just need to make sure that the nipples are screwed in the same number of turns. If the needles are short, then this can be determined by the number of visible “steps” of the thread in the nipples
After all the steps are completed, you need to install the wheel with the dialed spokes on a special machine or any other device (you can use a bicycle for this). It is in this position that all the irregularities will be visible. the skew of the wheel in any direction can be corrected by adjusting the twist of the nipples. In most cases, half a turn is sufficient to align the wheel. Please note that such a check must be carried out twice. when the wheel is horizontal and when it is vertical.
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End of balancing, conclusion
After balancing is complete, make sure the spoke ends do not protrude beyond the rim. If this is observed, the protruding ends need to be cut off, and the remaining grease (it can ruin the camera) should be removed.
Knowing how to properly tighten the spokes on a bicycle is extremely important and useful and simply necessary for every lover of this type of transport. After reading this article, a person will be able to carry out such an adjustment on his own. It should be remembered that you need to be careful and careful when tightening the knitting needles. Improper wheel alignment can lead to premature wheel failure.
The first step is determining the length of the bike parts
If you have to adjust the spokes on the front wheel of a bicycle, then you can not even deal with determining the length of the parts. it is believed that it is the front wheel that is structurally simple, the length of all spokes is absolutely the same.
As for the rear bicycle wheel, things are a little more complicated. The fact is that in this wheel the spokes are set of different lengths, since it is necessary to observe the difference in inclination.
How To Tighten the Spokes on Your Motorcycle
Note: experts do not recommend that you independently determine the length of the spokes. For this, there are special calculators on the sites that allow you to get the necessary calculations online.
Elimination of horizontal and vertical irregularities
In the case when horizontal unevenness (“figure eight”) prevails at the right displacement (hump) of the rim by about 4 spokes (when two of them look at the left flange, and two at the right), then the left nipples are pulled up by a quarter of a turn, and the right ones. are weakened by the same amount. If the hump consists of three spokes: one to the left flange, two to the right, then the first is pulled half a turn, and the other two are also loosened by half a turn. If the irregularities are not eliminated in this way, then the worst left irregularity is selected. and this place is stretched.
Vertical bumps, called ellipses, are handled in a slightly different way. On the rim, a place is searched for, the farthest from the bushing, and stretched according to this pattern. If the area found consists of two knitting needles, then they are both pulled up by half a turn, and if out of three, then the middle of them is also pulled up by half a turn, and the two extreme ones. by only a quarter of a turn. This method increases the stiffness of the wheel.
Initial adjustment phase
Do not forget that the tightening of the spokes on a bicycle is carried out with the camera and tire removed, so as not to damage them during operation. Before you start to tighten the knitting needles, their nipples must be wrapped to the same depth. Note that nipples come in three basic sizes (3.22 mm, 3.3 mm and 3.45 mm) and for ease of use the key must fit exactly to the nipple. Otherwise, the key will slip. There is also such a subtlety that if the needles are short, then after tightening the nipples, the threads are visible at the same level, if they are long, then the outgoing end of the spoke is set at the level that the nipple splines reach. Evenly wrapped nipples greatly simplify the adjustment process.
Then screw the nipples from the valve hole, each one turn. The spokes are then checked for tension. If the tension is insufficient, then you can make another turn. the main thing is not to overdo it in this matter. If the turnover is superfluous, then when passing the second half of the wheel rim, it may be difficult to tighten the next nipples. In this case, adjusting the bicycle wheel with the spokes requires a reverse stroke, that is, you should perform a reverse rotation at each twisted nipple.
Further adjustment of the spokes on the bicycle, if possible, should proceed in the following direction. the assembled wheel must be installed on a special centering device, with the help of which irregularities are eliminated. If this is not possible, the wheel is mounted on a bicycle, which turns the wheels upside down. After that, the wheel being installed must be carefully inspected. First, the loose knitting needles are determined. The method of determination is quite simple. for this you need to step with your fingers towards the spoke, the amplitude of the vibration should be 1–2 mm. If it is larger, then the problem needles are tightened.
Wheel assembly, bicycle wheel re-spacing
The most important part of a bike is the wheels. If you take two bicycles. one extra-class, the other cheap ten-speed. and change the wheels on them, then the cheaper one will be faster. However, getting good wheels is not easy. The fact that the wheel is balanced at the time of purchase does not guarantee that it will remain so during use.
Most bike mechanics do not know how to assemble wheels that can be ridden for a long time without adjustment. But even qualified mechanics do not have enough time for thorough work and skip some operations, as a result of which quality and reliability are reduced. Therefore, it is best to assemble the wheels yourself. This is done as follows:
- A. Set
- 1. Lubricate the spoke threads and rim with oil where they touch the nipples. Without this, it is impossible to pull the spokes tight enough.
- 2. If the holes on the hub flanges are countersunk on one side only, the spoke heads should be on the non-countersunk side. countersink is designed to bend the spoke.
- 3. Insert nine spokes into one flange with a free hole between them and with the heads on the outside. If it is a rear wheel, start at the right (threaded) side of the hub.
- 4. Take the rim, find among the holes shifted to the right, the closest to the right of the valve hole.
- 5. Insert the first spoke into this hole and screw the nipple two turns. This spoke is called the key.
- 6. Count four holes clockwise from the key spoke, insert the next spoke and tighten the nipple.
- 7. Check your progress against the following conditions:
- but. The threaded part of the sleeve faces the worker;
- b. The spoke closest to the valve hole is to the right of it;
- from. Both spokes connect the right side of the rim to the right flange of the hub:
- d. Three free holes between the spokes.
Contact our bike workshop to assemble your bike!