How to fix eights on bike wheels -This question is relevant for many. Eight on the wheel of a bicycle is the most common problem of its deformation. The main reason for it are loose spokes. Consider the correctness of the tension of the spokes, types of eights and how to correct them.
The correctness of the tension of the spokes
Of the correct tension of the spokes often dependdriving characteristics of this vehicle. The tension of the spokes produced in the direction of the tangent of the circumference of the sleeve with three crosses along the path from the flange of the sleeve to the rim. Thus, the strength and elasticity of the wheel is achieved. The spokes are inserted differently, one from the inside, the other from the outside of the sleeve - and so on around the perimeter of the circle. Then the needle is threaded into the socket of the rim, a nipple is put on top of it, and with the help of a nipple key, the needle is tightened.
Causes of deformation
In operation, the bike is experiencingloads, and they are least dependent on how you drive. Over time, there is a process of changing the geometry of the wheel rim, that is, its deformation. How quickly it happens mainly depends on the quality of the rim.
On the rim of the wheel can form three defects. This is the eight, "umbrella" and "egg". Let us dwell on each of them.
We fix the eight
How to fix the eight on the wheel? The eight in this case is when some part of the rim does not coincide with the plane of rotation.
Tools needed for repair:
1) chalk, with its help, we will mark the area with the defect;
2) a key of the spoke;
3) a wheel straightening machine is desirable, but this is notrequired Eight small size can be removed without removing the wheel. Turning the bike wheels up - in this position, you can check the correctness of the wheel relative to the brake pads.
How to fix eights on bicycle wheels?This process can be divided into several stages. At the first stage it is necessary to find the deformation. In the process of rotating the wheel to him to bring chalk. In the place where there is a figure eight, a trace will remain. Using this simple method, you can easily determine where the deformation of the rim occurred. At the second stage, we make tightening and loosening of the spokes, but only from a certain side. If these manipulations are performed incorrectly, you can ruin the wheel even more by getting a new deformation.
How to fix the eight on the wheel of a bicycle?There are several ways in which it can be removed. If it is between two knitting needles located next to each other, then using the spoke wrench, tighten the first knitting needle 1/3 of a turn, and knit the knitting needle next to it in the opposite direction, while loosening the clamp also 1/3.
It is quite common whenThe eight is located opposite one of the wheel spokes. Then the pulling of the knitting needles must be carried out ¼ turn, and by 1/8 turn you need to relax the two knitting needles located next to it. It happens that on a deformed wheel, the eight changes the position of several spokes located side by side. This case is difficult, and you need to be very careful and adhere to the following rule: the needles, which are closer to the center, need to be tightened or loosened with greater force, and the needles, which are located at the edge, need to be tightened or looser with less force.
In order to determine the correct executionrepair, you need to unwind the corrected wheel, and the changes should be immediately noticeable. The actions you performed were correct if the wheel became flat, otherwise you need to repeat all the actions again.
Many are wondering how to fix the eight on the rear wheel of a bicycle. There is no fundamental difference between the correction on the rear wheel and the front wheel.
Radial beating
"Egg" is when the wheel rim becomesoval, that is, when one part of the rim is located closer to the center than the rest. "Egg" appears, as a rule, after unsuccessful landings and is much less common than the eight.
How to fix the eight on a bicycle, which is commonly referred to as "egg"? Make it much more difficult than in the previous case.
1. The very first thing that needs to be done is to remove the tire and make sure that the rim is deformed and not the tire.
2. Turning the bike, turn the wheel, while attaching the top of an object. It should be noted with the help of chalk that part of the rim that will lift the subject.
3.At the third stage, three directions must be traced simultaneously: starting with the central spoke, loosen the tension; pull the needles, which are near, for the same number of turns, so that there is no figure eight; and the needles, which are in the opposite end of the wheel, pull to exclude the appearance of "eggs" in another place. In order to fix the eight, experience is necessary, since this process is rather complicated. You can start it again if something does not work out, first loosening, and then pulling all the spokes at the same time.
4. After correcting the “eggs” in the same way as in the example with the figure eight, you need to press the spokes with all the weight - for their shrinkage.
Editing "Zonta"
There is such a thing as an "umbrella".This is when the wheel rim has shifted in one direction and is located not ideally smooth with respect to the center of the hub. The value of this offset will depend on the design of the frame itself and on the type of brakes. This fault often occurs in case of improper wheel assembly.
The umbrella straightens out in the same way as the eight.On the one hand, you need to tighten the spokes, and on the other hand, loosen the force too. In contrast to how to straighten the figure eight, when straightening an umbrella, the force should not fade, but should be uniform over the entire circumference.
Fundamental rules
So, in order to know exactly how to fix eights on the wheels of a bicycle, you need to remember a few rules.
First, by pulling the wheel spokes, you candamage the rim. If in the process of straightening one or more of the spokes will be overtightened, it is necessary to loosen them and the neighboring spokes, after which the adjustment is repeated again.
Secondly, in the process of driving the spokes can break,if they are very weak. If during the alignment process one or several spokes of the wheel are loosened, it is necessary to tighten them, then repeat the adjustment again.
