To tighten the chain on a regular bike, you need to set the transport with the wheels up. This is the most comfortable position for loosening the rear wheel nuts. When unwinding, it is easy to set the optimal sag and tension of the bike chain. You need to move the wheel along the grooves. The mechanism is fastened only in a parallel position of the axis relative to the carriage shaft. The correct slack is 5 mm. When tightening the chain, there is a difficult rotation of the pedals. Insufficient tension will cause the mechanism to kick off. Sometimes there is a tight stop of the wheel in the edges of the grooves and the extra links are removed.
Collapsible chains are placed on a regular bicycle without speeds; they have a lock on one of the links. Most modern speed bikes use non-separable chains with all the links riveted equally well. It is not difficult to disassemble a one-piece riveted chain, it is enough just to grind the heads of the pins on one of its links on emery. It is even easier and more accurate to disconnect the rivets using a special tool. squeeze.
It should be noted that pomace is a versatile tool. With its help, you can not only squeeze out the locking pin, but also re-rivet the disassembled chain. Many squeezes have two working grooves: one is needed for pressing the pin out of the roller, and the other is for pressing it in. A mounting location farther from the pressure screw is for ripping the chain pins. You can learn more about using such a tool in the following video.
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Tensioning the chain on a sports bike is a little different. Since the sports bike is equipped with a rear parallelogram derailleur, the bike chain is somewhat different from the usual one. In this case, the tension is determined by the degree of stiffness of the switch spring. Excessive length of the mechanism leads to the chain hitting the veloram. Insufficient length makes switching difficult. As a result, parts wear out faster. The main reason for the sagging mechanism of a sports bike is extra links. Chain collapse can be prevented by removing excess links with a squeeze for the bike chain.
Tensioning the bike chain
The mechanism can be pulled independently, both on high-speed models with gear shifting, and on bicycles without them.
In order to properly tension the chain on the bike, especially if it starts to slip, you need wrenches (which usually come with the vehicle) and a little patience.
Bend the bicycle spoke with a spiral and place it on the transmission. It is necessary for the spiral to pull back on the bike chain. This is an old and uncomplicated method, where the pacifier does not look very aesthetically pleasing.
Adjusting the tension on a bike without gears
A properly tensioned chain on a bike without speeds should be slightly free by an amount of sag of about 5 mm.
To tighten the chain on a regular speed bike, you need to:
- Put your transport wheels upside down.
- Loosen the nuts or eccentrics of the rear wheel.
- Adjust the correct amount of chain slack by sliding the wheel along inclined slots called dropouts.
It is necessary to fix the rear wheel only in the position when its axis is parallel to the carriage shaft.
If the chain is too tight, it becomes very difficult to pedal on the bike, the parts of the chain drive wear out quickly. Whereas the sagging chain can jump off the asterisks, and it will definitely be impossible to go further.
If the wheel is already against the edge of the dropouts, there is nowhere else to move it, and the chain belt is still dangling, then you will need to remove a couple of links.
The chain starts to slip when the tension is released due to its extreme tension. And when overstretched, it, in turn, quickly wears out the sprockets. So by putting a new chain on an old ratchet, you may not achieve anything. All the same, slipping on small stars will remain.
If this is not the first time you tighten the old chain, get ready to replace it soon. Remember that you can only remove two links from it once. In the end, you still have to spend money on a new part.
Why is there a violation of gear shifting
To understand what action should be taken to adjust gear shifting, you need to understand what causes may lead to the problem in question. Experts identify several such predisposing factors:
- deformation of the rooster;
- stretching the cable;
- deformation of the speed switch;
- malfunctioning return spring.
How to adjust the front derailleur
There are also clear and simple step-by-step instructions for adjusting the front derailleur:
- Shifting the chain to a smaller star.
- Unscrew the fixing screw and release the cable.
- We find the screw marked “L”, with its help we adjust the position of the frame so that the chain is between the plates of the frame, but at the same time does not touch them.
- We stretch the cable, fix it with a screw.
- Now we move the chain in the cassette to a smaller sprocket. it is convenient to do this using the rear derailleur.
- With the front derailleur, move the chain to the middle sprocket and look. if the chain on the second one touches the outer side of the frame everywhere, then you need to increase the cable tension using the drum located on the left shifter.
- We switch the gear to the largest sprocket in the cassette and check. if the chain touches the walls of the frame, you need to move the last element so that the chain is in the middle. This manipulation can be done using the screw marked “H”.
The combined type is a combination of an external and an internal mechanism. It attaches to the bike’s rear wheel hub.
The combo derailleur is a hybrid of the external and internal types of bicycle shifting.
This mechanism is extremely rare, since it has collected all the negative aspects of both external and internal gearshift systems. It is configured only by a professional.
How to properly adjust the rear and front derailleurs on a bicycle: photo and description of the process
Despite the fact that the bicycle was invented a long time ago and, it would seem, should have been out of date for a long time, but this two-wheeled vehicle is gaining more and more popularity every year. Cycling enthusiasts prefer this type of transport due to its convenience, ease of operation, environmental safety and practicality. Not only ordinary bicycles are very popular, but also mountain, track bikes, which use modern innovative technologies. In order for the owners to enjoy cycling, they need to take care of it and monitor the condition of all parts and assemblies. If, in the process of cycling, you hear extraneous sounds, creaking, knocking and twitching during gear shifting, it’s time to pay attention to such a detail as the gear selector.
How the switches work
Using the handle and shifter, the cyclist activates the required speed. In a certain position of the handle, the cable is pulled. As a result of this tension, the frame is thrown onto larger sprockets; when the cable is loosened, it is not thrown onto small sprockets. As mentioned above, you can start setting up your bike from the rear derailleur. Procedure for adjusting the rear derailleur:
- select the second star in the front block, and the smallest in the rear one and set the switch chain on them;
- The bike’s rear derailleur system has two bolts that act as stops. One is abbreviated as H, and on the other. L. These two bolts are used to adjust the high and low gears on the sprockets. If during the adjustment process any extraneous sounds arise, you can get rid of them with the help of the latch;
- check the tension of the cable and if the tension does not correspond to the required one, use the regulator located on the shifter;
- Test the switching quality. If the switching occurs smoothly, no extraneous sounds are heard, then you did everything right.
When chain adjustments no longer help?
Chain stretching cannot always be eliminated by the trivial removal of unnecessary links. The thing is that under the constant influence of high loads, the links simply begin to deform and stretch.
So, the normal link length is considered to be 11.9-12 mm. If this figure reaches 12.1-12.6 mm, then the chain begins to “lick” the cassettes, and with a length of 12.9 mm, the chain will have to be changed along with the stars. You can measure the length of the link using the lips to measure the internal dimensions of the caliper.
How to tighten a chain on a bicycle?
Bicycle maintenance is an integral part of its operation, no matter how carefully and carefully you treat your vehicle. This is due to the natural wear and tear of the parts. And today we will talk about how to tighten the chain on a bicycle, because it is this spare part that requires special attention and, with intensive riding, often causes problems.
How to tension a chain on a regular bike?
The first and easiest way is to offset the wheel. It is implemented in the following way:
- We turn the bike over and put it on the handlebar and harness. You can also use dedicated stands for repair and maintenance.
- We loosen the bolts or eccentrics with which the wheel is attached to the frame itself.
- We begin to move the wheel along the landing grooves. If the chain should be loosened, then the wheel should be moved towards the front wheel, if pulled, then vice versa.
How To Put A Bike Chain Back On-EASY Tutorial
After completing the adjustment, it is important to check that the axis of the rear hub is perpendicular to the longitudinal axis of the bike itself, only in this case the wheel can be fixed.
The second way is to remove the extra links. This can be done using the “old-fashioned method”, knocking out the link roller with some thin elongated object. But this approach requires a lot of time and effort, and there is a high probability of simply damaging the chain.
It is much easier to purchase a special squeeze that will allow you to remove an extra link in a matter of seconds, minimizing the likelihood of damage to the chain. How to do it?
- We take one link of the chain, put it in a special groove on the squeeze and gently squeeze it with a lock.
- We twist the arrow knob clockwise, slowly squeezing the roller out of the plates. IMPORTANT! The roller should not be squeezed out completely, because then it will be extremely problematic to return it to its place.
- After parsing one link, we disassemble the chain and determine the number of extra links, removing them in the same way as described above.
- We connect the ends of the chain and press the roller using a squeeze.
I would like to note right away that this procedure requires a certain skill and for the first time may require a lot of time and effort.
How to determine the need for chain tension?
If we talk about ordinary bicycles that do not have a speed switch, then everything is extremely simple. just pull the chain with your finger until it stops and approximately measure the distance of its displacement from the start to the end point. It should be about 10-15 mm. If this indicator is exceeded, then the chain requires tension, but if the offset is 5 mm or less, then it is better to loosen it.
In the case of bicycles that have a gear shifting system (several front and rear sprockets), there are two ways to determine the need for chain tension.
Switch the speeds so that the chain is on the largest sprocket, both in the back and in the front. We take the chain in the area under the chainring and pull it towards the front wheel until the rear derailleur reaches the stop. If, in this case, only 2 links remain in a weakened state, then the chain has optimal tension. Otherwise, its length needs to be adjusted.
We set the speeds so that the chain is pulled over the largest sprocket in the front and the smallest in the back. In this position, the idler roller and tensioner roller should form a straight line perpendicular to the floor. If the offset goes to the left, the chain should be shortened.
Now let’s figure out how to adjust the chain length depending on the type of bike.
How to tighten a chain on a bike at speeds?
Speed bikes have a more complex chain tensioning principle. There it is regulated by a special spring located on the rear carriage. Accordingly, adjusting the chain tension by simply moving the rear wheel will not work.
The only available way to tighten the chain on a speed bike is by removing the chain links. This procedure is carried out in the same way as described in the paragraph about ordinary. You will also need a special squeeze and a few minutes of time.
Improper chain tension can cause problematic gear changes, slippage and faster wear on the bike undercarriage, so it is imperative to monitor its condition, retighten and replace it regularly.
We hope that in this article you have found useful information for yourself on how to tighten the chain on a bicycle, and you can put it into practice if necessary.