How to tension or tighten a bicycle chain?
Signs of the need for a procedure
On bikes that are equipped with a planetary hub or that have speed derailleurs, it is easy to determine when the chain needs to be tightened. To check, pull it down until it stops. If the distance she travels is more than 1-1.5 cm, then adjustment is required.
You can determine whether you need to tighten the chain on a high-speed bike using several methods:
- The position of the speeds is set so that the chain is located on the largest stars in front and behind. Then you need to pull it down and towards the front wheel until the rear derailleur does NOT come to the stop. If after this procedure there are NOT more than 2 free links, then there is no need to adjust the chain length.
- The chain is set to the largest star in the front and the smallest in the back. In this case, the guide roller and the roller tensioner of the rear transfer must be located on the same axis perpendicular to the ground. The required length on 2 hangers is determined as follows: it should press on the pendulum until the cassette of the sprockets in front leaves the greatest distance from the ratchet. This is the best position to measure. Required chain length.
Cycling without gear
First you need to turn the bike over, first placing a soft material under the seat. This will avoid damage. Then loosen the 2 nuts securing the rear wheel. To set the desired level of slack, the wheel gently slides along the sloped grooves. After reaching the set level of adjustment, the wheel is fastened back with nuts. They need to be tightened firmly, but without much effort, so that they are NOT damaged.
The operation of the device must provide free pedal travel. At the end of the work, you should check how the bike is functioning, and also make sure that the wheel is parallel to the carriage.
Precise chain tension is essential for normal bike use. Excessive tension makes it difficult to crank the pedals. In addition, the chain drive components quickly deteriorate. If the element sags too much, then the risk of its jumping off during movement increases.
On a vehicle with speeds
The tension of the chain drive on the vehicle at speeds is carried out by the spring force of the derailleur itself. But if its length is excessively long, then it will be impossible to remove the sagging with the help of the tensioner. In such a situation, when driving, the chain will hit the surface of the frame.
If the length is less than necessary, then there will be difficulties with gear shifting. In addition, transmission elements will wear out faster.
Alternatively, the chain is positioned on the Largest star in the front and the smallest in the back. She pulls herself up until the wasps of the rollers are on the same vertical. The chain length is adjusted on 2 suspensions. The rear swingarm is fixed in such a way that the distance between the rear ratchet and the front chainring is maximum. After determining the required length, the extra links are removed.
Removing extra links
NOT every chain can be mounted directly onto the bike. This applies primarily to high-speed vehicle models. Often before installation it has to be shortened by removing links.
A collapsible model is installed on a regular bicycle. One of its links is a special lock. High-speed models are equipped with non-separable parts. To disassemble them and remove some of the links, you need to grind the pin heads on one of the links using emery. To facilitate the task of separating the rivets, a special tool. squeezing will help. It allows you not only to quickly remove unnecessary links, disconnect, remove the chain, but also reassemble it. The tool has 2 slots. One allows you to squeeze the pin, and the second. to press it back.
During operation, it is necessary to control the rotation force. The move will be hard at first, then weaken a little. At the Final stage, it will become heavy again. Then the chain must be disconnected and removed. The pin will remain on the plate from the outside.
It is necessary to measure unnecessary links from the side where there is no pin. After that, remove them and connect the chain, press the pin back with a squeeze. Check the alignment carefully. The pin travel should be uniform on 2 sides, and the movement at the junction should be light and smooth.
How is the process of tensioning the chain on a regular bicycle
This term refers to a bicycle mechanism containing one rear sprocket. There is only one technology. to displace the rear wheel hub. The detailed process is described below.
Before starting such a procedure, you need to make sure that the chain needs tightening. We carry out the usual test. Just pull the chain down as far as possible. If the lowering distance is more than 1.5 cm, then adjustment is necessary.
The opposite situation. The chain did NOT pull back even 5 millimeters. This means she is in a state of “guitar string” and needs immediate relaxation.
- Place the bike in the Repair Pose, wheels up.
- Bolts and other elements that serve to fix the rear wheel need to be loosened (it is not necessary to unscrew completely).
- We adjust the chain, move the wheel in relation to the star.
- Let’s make the required tension, evaluate the perpendicularity of the hub axis, focusing on the longitudinal one of the bike itself.
- We fix the wheel with fasteners.
If, for some reason, such a procedure cannot be carried out, it is necessary to use squeezes to remove unnecessary links and by this method to achieve the desired parameters of the product. How to do it. described below.
What types of bicycle chains are found
All types of bicycles use the same chain design and not depend on their purpose. Such a product is a single-row roller chain with a clearly marked pitch. 12.7 millimeters. Moreover, a separate link includes:
- External plates;
- Internal elements;
The main difference between the chains is based on whether the speed is great or not. The number of speed modes determines the availability of suitable sprockets. This, in turn, affects the width of the bike. Also, a characteristic variety will be the presence of a specific lock or its absence. It serves for easy removal of the chain and its re-installation.
How to properly tension the chain on a bike
Friends need to be loved. Even if they are two-wheeled. Such a relationship involves skilled caring for your friend. The chain is tensioned in the name of its safety and the life of the bike. Let’s analyze the question of how to tighten the bicycle chain correctly, quickly and efficiently.
Slippage is a result of a transmission defect.
Part slippage occurs when the tension is weak. And the weakness itself is a consequence of physical stretching. This, in turn, according to the domino principle, leads to increased wear of the stars.
Therefore, if you installed a new chain or tightened the old one, you may not get the result. In this case, the stars also require replacement. Metal that has been worn out cannot be restored.
If you have already had to adjust the chain by removing the links more than once, you need to think about purchasing a new caterpillar. In the end it’s a matter of your safety.
Link Removal Process
Consider a modern way of adjusting the chain length using a device. squeeze. Its low price more than compensates for all costs.
The tool design includes two grooves. The first one squeezes out the pin, the second one presses it in.
- Choosing unnecessary links.
- We insert an equal link into the squeeze and fixing with a lock.
- We start to rotate the crank and squeeze out the pin.
- The ego does not need to be squeezed out to the end.
- The formula of the movement will be as follows: tight move. easy. hard again.
- Disconnecting tenaciously, leaving a pin on the plate.
- Count the links and dismantle them.
- The chain is connected in reverse order.
- Press in the pin.
- We carefully evaluate our work.
There is a situation where the chain is stretched so much that removing the links does not give sufficient effect. In this case, it is better to purchase a new product.
How to adjust the chain on a speedy bike view.
Mountain, road or other type of bicycle, which uses in its mechanism the ability to move tenaciously from star to star, requires a separate method of chain tension. In such a two-wheeled mechanism, there is a permanent fixation. The tensioning procedure is guaranteed by a spring located on the rear derailleur. When the chain starts to sag, your friend’s speed performance deteriorates and a knock is heard. If the chain is overtightened during the repair process, this leads to poor gear shifting and rapid wear of the stars.
At the beginning of the entire repair procedure, it is worth determining the condition of the sagging chain. This can be done in two ways.
We set the speed to the maximum front chainring and the same rear. At the front sprocket, pull the chain in the direction of the front wheel. As soon as the rear derailleur has reached the stop, we calculate the number of extra links. If there are two of them, then everything is normal. The rest of the indicators indicate that it is necessary to make adjustments.
We position the speeds so that the maximum front chainring and the minimum rear chainring are used simultaneously. In this case, the roller, which directs and the one that pulls the rear transfer, must, correlate along the axis and have perpendicularity to the surface of the earth.
The pull-up process consists in removing the links, which turned out to be redundant. We will consider how to do this in a separate paragraph.
When adjusting a speed bike, you can use a separate tool. the chain tensioner. Its main function is to manage rigidity and save its owner from unnecessary problems with the repair of the problem area.
The mechanical version of the tensioner is tenaciously mounted next to the rear derailleur. The uncomplicated design of such a device Not only clearly fixes the chain, but also serves as protection against unforeseen collapse when pulled.
The installation of the tensioner implies the simultaneous alignment of the device and the switch. The chain will run like clockwork: smooth and precise. But still, such a mechanism is not a panacea for the described problem. Sooner or later, you will have to carry out the process of removing the tensioner and adjust the chain by removing the links. Due to its physical properties, the chain will stretch over time, especially on a high-speed bike. But from the point of view of practicality, the acquisition of a tensioner is necessary in order not to get into a difficult situation while traveling.
Negativity due to improper chain repair
Consequences can be conditionally divided into two types: for a person and for a bicycle. Consider how this threatens a two-wheeled second.
Any slack Decreases speed characteristics and increases muscle expenditures to create speed. That is, if you have weakly tightened the chain, be prepared for the fact that it may break, and most importantly, it will begin to cripple the bike. Too much tension will quickly wear out the parts. Then replacing one chain is not enough. In addition to the stars, spokes, bushings, their components and other parts suffer.
For a person. The force that is transmitted to the wheels when pedaling in a stretched chain mode quickly leads to increased fatigue. The possibility of a long trip is actually reduced. Instead of your favorite rest, you can get road torment. According to statistics, the worst cases are the cases of the chain falling off at speed while on the road. It’s not just injuries. This is the likelihood of death.
Rear wheel deformation
Perhaps the problem is the deformation of the rear wheel. One of the most unpleasant cyclist problems is the so-called “eight”. “Eight” is the deformation of the wheel, violation of its shape and the inability to perform functions. This problem is eliminated by tightening and loosening the spokes with a special spoke wrench. To do this, the wheel is removed, the affected area is determined and the central spoke of the “eight” is highlighted. Then the needles are pulled through one.
What to do if the chain comes off on a speed bike
A bicycle is a unique means of transportation. It does not pollute the environment, has a positive effect on the health of its owner, and allows you to experience physical activity in the fresh air. A bicycle is the first vehicle that a person gets in his life and for many it remains a favorite means of transportation for life. The most common problem faced by every cycling enthusiast is the chain flying off the bike. For what reasons this happens and what needs to be done to fix this problem, we will try to figure it out in this article.
How to Increase Tension on a Single Speed Bike
So that the chain does NOT fly off again next time due to sagging, it is better to immediately increase its tension.
To do this: Loosen the nuts on the dropouts slightly so that the rear wheel moves slightly and pulls it back. With the correct bicycle tension set, slowly tighten the nuts. Just do not skew the rear wheel and check that it rotates strictly in the vertical plane and does NOT touch the frame and wing feathers.
There is no need to tighten the bike chain too much, the pedals will spin tightly. There should be a slight slack, but a maximum of 1-1.5 cm.
If the rear wheel has nowhere else to move, remove the equal link.
When chain adjustments won’t help?
Chain stretching cannot always be eliminated by the trivial removal of unnecessary links. The thing is that under constant exposure to 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 tension a chain on a regular bike?
The first and easiest way is to offset the wheel. It is implemented as follows:
- Turning the bike over and put it on the handlebar and harness. You can also use the dedicated repair and maintenance stands.
- Loosen bolts or cams that attach the wheel 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.
After finishing the adjustment, it is important to check that 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 “Dedovsk method” by 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, which will allow you to remove an extra link in a matter of seconds, SWEDA minimizes the likelihood of chain damage. How to do it?
- We take an equal link of the chain, put it in a special groove on the squeeze and gently squeeze it with a lock.
- A steep arrow crank clockwise, slowly squeezing the roller out of the plates. IMPORTANT! The roller should not be squeezed out completely, because then returning it to its place will be extremely problematic.
- After parsing one link, we disassemble the chain and determine the number of extra links, remove them 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.
The algorithm of actions when putting on the chain is approximately as follows.
- Turn the bike upside down, place it on the saddle and handlebar, or Lift it so that the rear wheel rotates freely.
- If the bike has a bicycle guard, it is better to remove it. This will make it easier and more comfortable to reach the chainring. If you are too lazy to shoot, or you can already reach the asterisk. it’s up to you.
- Place the chain completely over the rear sprocket. (If you have not removed the protection, then it may be more convenient to completely put it on the front sprocket).
- Place the chain over the chainring in the direction of rotation and pedal forward in the direction of travel. When the pedals are rotated, it itself is thrown over the remaining teeth.
Here you need to understand that if the bike is upside down, then the chain is thrown onto the lower part of the sprocket (in relation to you) and, scrolling the sprocket by the pedal clockwise, we put it on the front sprocket entirely. If you start to throw the chain over the top of the sprocket in relation to you, this will not be able to pedal. after all, in fact, you will have to press the brake.
If the bike is in the normal position (wheels down), then again throw the chain on top of the sprocket and pedal clockwise. as if you were driving forward.
Everyone is wearing a chain.
- Key for removing the rear wheel;
- Pliers for holding segments and pin;
- Forcing. a device for pressing out pins, without a lock. the most important tool in the process.