How the chain runs on a speed bike

Ordinary bike

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.

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.

No lock

If the bike has a chain without a lock, then you will have to press the axle out of the chain link. Also, this process will need to be carried out in order to reduce the number of chain links when necessary.

To press out the chain axle, you need a special tool. squeezing the chain. For this operation, you can select any link in the chain, the only condition is, when re-pressing it is better to use a new one, since after the operation the link loosens a little.

Insert the chain link into the tool and secure with the screw. Please note that in some chain releasers there are two seats, one for pressing the axle out (it is closer to the fixing screw), and the second one is used only for adjusting the axle. Tighten the squeeze screw carefully, thereby extruding the axle.

Do not push the axle out to the end if you plan to assemble a link with the same axle, otherwise it will be problematic to install it back.!

Removing links

Collapsible chains are placed on a regular bicycle without speeds; they have a lock on one of the links.

On most modern bikes with speeds, non-separable chains are used with all the links equally well riveted.

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.

CeramicSpeed’s Chainless MTB & Road Drivetrain Now Shifts

You can learn more about using such a tool in the following video.

How to Tension Your Mountain Bike Chain?

chain, speed, bike

Every cyclist should not only be able to ride his two-wheeled friend, but also be able to properly care for him, including pulling the chain on the bike.

Many questions arise with mountain vehicles.

We recommend that you put all your business aside and familiarize yourself with the information provided on how to correctly and quickly tighten the chain on a mountain bike. This knowledge will be useful to you more than once.

The chain is one of the most important parts of a bicycle and requires proper installation and adjustment.

The bicycle cannot be called a very complex device, there are also more complex ones. But still, there are several important and irreplaceable elements in its design, on which the operation of the entire mechanism directly depends. The chain always takes an important place. It will work for a long time only in the case of correct, timely and complete care.

It is necessary to monitor its work and promptly respond to emerging problems. For example, a correctly installed and serviceable chain should not emit extraneous sounds in the form of crackling and squeaking. During the operation of the bicycle, this element can stretch and be subject to wear.

If the installation and adjustment of the chain was done correctly, then it should sag by 10-12 mm, no more and no less. Pulling the chain with your fingers, it should move 1-1.5 cm from its original position.

With more pulling, it is necessary to urgently tighten the chain.

These regulations apply only to two types of cycling: models with no speed switch or with an installed planetary gearshift mechanism.

When a new chain is installed, it is imperative to adjust the tension level, and after three trips, it is necessary to tighten it. The new mechanism is prone to fast stretching.

Bicycles are now different, with significant differences in design. To properly tension the chain on a bike, you need to know the rules that apply to your type of vehicle.

Which bike chain stabilizer is best

There are only 3 types of standard tensioner settings:

ISCG mounts directly to the frame with bolt reinforcement in a circle. For this, 3 fasteners are enough. In this case, the distance between the bolts should be 47.77 mm.

“ISCG 05” is considered the most demanded option, as its installation is quite simple. The iscg05 chain damper and other models are used. The fixing circle has a diameter of 73 mm, but the distance between the fixing elements is 55.92 mm.

The “BB” is mounted on a carriage that presses the tensioner to the bike frame.

Dampers differ not only in the type of installation, but also in other parameters:

  • weight;
  • cost price;
  • appearance;
  • material;
  • degree of protection.

The material can be used both high quality metal and plastic. The cost of the product depends on these indicators.

How to chain a speed bike or mountain bike

The chain may come loose or break when riding a bicycle. There are at least 2 reasons for this. Let’s figure out what these reasons are and how to deal with them.

Reasons for breaking the chain

The first option is a star bent on the front system. In this case, switch to a different speed and drive on.

If during movement you are used to using all the stars, then the damaged one needs to be replaced. Of course, this can only be done if the system is collapsible. If this is not the case, then you need to change the entire system with a connecting rod.

READ  How To Chain A Sports Bike

If there are no breakdowns, then the problem is in the speed settings. The adjusting screws on both switches will help with this. Thanks to them, the chain does not go to extreme speeds. And it breaks down in case of incorrect adjustment of the screws.

When the chain is removed from the largest chainring in the rear derailleur, it is necessary to turn the screw marked L. Our goal is to have the chain sprockets on the derailleur opposite the large chainring.

Accordingly, if it breaks down with a small one, then adjust with the screw H until the stars of the switch are exactly under the small star.

On the front of the system, if the chain breaks off the small star towards the frame, then turn the screw marked Low.

When the chain breaks from the big sprocket to the connecting rod. adjust High.

To adjust the screw labeled Low, you need to set the lowest speed on the bike.

Tighten until the distance between the inside of the frame and the chain is about 1 mm.

Screw the High screw at the set maximum speed until the gap between the outer frame and the chain becomes 1 mm.

The most common breakage factor is a change in speed when climbing a hill or other load. The links of the chain can either break or rivet during a break.

If the links are riveted, you can try to insert them back. A chain puller is useful for this. For this reason, it is desirable that he always be at hand.

If the chain links are broken, then you need to remove the broken and adjacent one, then rivet the chain with the same puller.

Reinstalling the chain is not difficult. Pull the rear derailleur slightly down and forward to loosen the chain.

Then we put the chain on the sprockets of the front system. A little effort, dirty hands and the bike is back on the move!

Reasons for chain slippage through the stars

Transmission misbehavior problems occur under load: pedal pressure when shifting gears. Slippage is especially pronounced when driving uphill, when this load is at its maximum. This pattern is equally true for a single speed bike and a speed bike. Let’s figure out what serves as a prerequisite, and whether it can be fixed.

The reasons why chain links break off the stars are simple and transparent:

  • elongation of links due to wear;
  • the teeth of the rear and front sprockets are worn out;
  • both factors at the same time.

The latter option is most common if the chain or cassette has not previously been changed separately.

Chain length is an indicator of chain wear. The standard size is 304.8 mm. Stretching leads to the fact that the teeth of first small and then large stars are sharpened more strongly, due to which the efficiency of gear shifting on a high-speed bike decreases several times. Especially noticeable lengthening will affect the transition from lower to higher speeds.

If the distance between the chain rollers increases, the width of the sprocket teeth decreases. You can easily notice the development with your own eyes. To calculate the degree of sharpening, the thicknesses of the teeth of a worn and a new sprocket of the same size are compared.

The Correct Way To Route Your Bike Chain | Tech Tip | Tredz Bikes

And finally, another reason why the transmission wears out quickly is incorrect gear shifting. For simplicity, let’s remember once and for all:

  • In front, the stars are counted from the smallest.
  • Rear cassette numbering starts from largest sprocket.
  • It is necessary to combine higher gears with higher gears (large stars in front and small ones in the back), and vice versa.
  • Since there are fewer sprockets on the front cassette, there are several sprockets for each sprocket on the rear cassette. For a standard 3X8 system:
Front one 2 3
Rear 1, 2, 3 4, 5, 6 6, 7, 8

Correct use of the gearshift system avoids excessive chain distortion, which would cause tremendous wear on parts.

Why does the chain slip on a bicycle?

Any bike ride, be it a speed race or a simple ride, has a significant impact on the drivetrain. During the ride, the chain and stars experience significant friction against each other, as a result of which they become unusable over time.

Timely lubrication and debris removal is essential to reduce friction and increase transmission life. However, even with proper care, the cyclist can face a problem of wear when the chain slips, the gears shift poorly, or the engagement of the links on the teeth of the sprockets is lost.

How can the malfunction be rectified

In this section, consider a situation where the chain starts to turn or fly off, the switches with the tensioner are set correctly. As already found out, the problem is caused by wear and tear. A radical option is to change the cassettes along with the chain. But there are also more gentle options that will allow the system to serve more.

So, remove the chain from the bike, straighten it and measure its length. By its size, you can judge its wear:

  • up to 306.4. slight elongation, the problem is only in the stars;
  • up to 308 mm. average wear.
  • over 308 mm. completely unusable.

After measurements, you need to inspect the front and rear cassettes. When the chain is stretched to 307.9 mm, wear is likely to show up on small to medium rear sprockets. They can be replaced separately without buying a new cassette.

Replacement is recommended at average wear, however, at first, the inaccuracy of the transfer and slip can only worsen. This is due to the mismatch between the roller spacings and the width of the teeth. Over time, the transmission components will rub together.

Stretching over 308 mm no longer allows you to ride a bike calmly. The chain constantly slips and dangles, can get stuck in the space between the sprockets. The correct solution is to change it along with the cassette. Can also be shortened by two or three links using a squeeze.

Is there an alternative? Yes, it exists, and it is a circuit breaker. In general, these devices are used for safety in cycling when the chain is likely to fly off the stars. But with their help, you can maximize the riding time with worn out parts.

The dampers consist of a disc (rockring) and rollers. There are also rollerless models, where the chain “calms down” only by the frame. Dual roller versions are used for high speed bikes where each of them corresponds to two chainrings.

READ  How to remove the rear wheel axle of a speed bike

Adjusting the derailleurs on a new bike

Slips and inaccurate gear changes under normal wear indicate deranged derailleurs. This problem usually occurs with a new bike, or if the chain and sprockets have recently been replaced.

General scheme for adjusting switches:

  • set the optimal cable tension;
  • adjust travel in lower gears;
  • adjustment of the chain stroke according to the higher stars.

For the rear sprocket, you still need to set the correct position of the tensioner, which will compensate for the chain slack. Bicycle Rear Derailleur Setting:

  • Loosen the screw and remove the drive cable.
  • Set low gears by placing the chain in the 1: 1 position.
  • By turning screw L, the alignment of the guide roller with the star is achieved.
  • Install the cable into the derailleur.
  • Turning the pedals, set the highest gears: the chain on the small sprocket in the back and the largest in the front.
  • Use screw H to match the roller and the active sprocket in the same plane.
  • The correct tensioner position is 5mm from the lowest sprocket in a 1: 1 chain position.

Similarly, the front derailleur is adjusted according to the scheme: setting the restrictions on L. adjusting the top gears on H. adjusting the tension of the drive cable. However, first you need to check the coincidence of the switch roller with the plane of the outer stars. Perhaps just setting the rear derailleur will be sufficient. And of course, checking the operation of the transmission, in particular, the chain tension, in practice.

In principle, adjusting the switches will last for a long time. The correct use of the speed system will help to reduce the wear rate, and the timely elimination of negative factors will allow the transmission to last as long as possible.

Thread A Chain On To A Bike’s Rear Derailleur

Spontaneous gear shifting

Spontaneous gear shifting occurs in the same way as overshoot, but only after it the chain is on another smaller sprocket (higher gear). The reason for this is the sum of two reasons. the flexibility of the frame and the friction of the cables.

Why does the chain slip on a speed bike

Any bike ride, be it a speed race or a simple ride, has a significant impact on the drivetrain. During the ride, the chain and stars experience significant friction against each other, as a result of which they become unusable over time.

Timely lubrication and debris removal is essential to reduce friction and increase transmission life. However, even with proper care, the cyclist can face a problem of wear when the chain slips, the gears shift poorly, or the engagement of the links on the teeth of the sprockets is lost.

Reasons for chain slippage through the stars

Transmission misbehavior problems occur under load: pedal pressure when shifting gears. Slippage is especially pronounced when driving uphill, when this load is at its maximum. This pattern is equally true for a single speed bike and a speed bike. Let’s figure out what serves as a prerequisite, and whether it can be fixed.

The reasons why chain links break off the stars are simple and transparent:

  • elongation of links due to wear;
  • the teeth of the rear and front sprockets are worn out;
  • both factors at the same time.

The latter option is most common if the chain or cassette has not previously been changed separately.

Chain length is an indicator of chain wear. The standard size is 304.8 mm. Stretching leads to the fact that the teeth of first small and then large stars are sharpened more strongly, due to which the efficiency of gear shifting on a high-speed bike decreases several times. Especially noticeable lengthening will affect the transition from lower to higher speeds.

If the distance between the chain rollers increases, the width of the sprocket teeth decreases. You can easily notice the development with your own eyes. To calculate the degree of sharpening, the thicknesses of the teeth of a worn and a new sprocket of the same size are compared.

And finally, another reason why the transmission wears out quickly is incorrect gear shifting. For simplicity, let’s remember once and for all:

  • In front, the stars are counted from the smallest.
  • Rear cassette numbering starts from largest sprocket.
  • It is necessary to combine higher gears with higher gears (large stars in front and small ones in the back), and vice versa.
  • Since there are fewer sprockets on the front cassette, there are several sprockets for each sprocket on the rear cassette. For a standard 3X8 system:

Correct use of the gearshift system avoids excessive chain distortion, which would cause tremendous wear on parts.

You can’t use the gear like that.

In this section, consider a situation where the chain starts to turn or fly off, the switches with the tensioner are set correctly. As already found out, the problem is caused by wear and tear. A radical option is to change the cassettes along with the chain. But there are also more gentle options that will allow the system to serve more.

So, remove the chain from the bike, straighten it and measure its length. By its size, you can judge its wear:

  • up to 306.4. slight elongation, the problem is only in the stars;
  • up to 308 mm. average wear.
  • over 308 mm. completely unusable.

After measurements, you need to inspect the front and rear cassettes. When the chain is stretched to 307.9 mm, wear is likely to show up on small to medium rear sprockets. They can be replaced separately without buying a new cassette.

Replacement is recommended at average wear, however, at first, the inaccuracy of the transfer and slip can only worsen. This is due to the mismatch between the roller spacings and the width of the teeth. Over time, the transmission components will rub together.

Stretching over 308 mm no longer allows you to ride a bike calmly. The chain constantly slips and dangles, can get stuck in the space between the sprockets. The correct solution is to change it along with the cassette. Can also be shortened by two or three links using a squeeze.

Is there an alternative? Yes, it exists and it is a chain breaker. In general, these devices are used for safety in cycling when the chain is likely to fly off the stars. But with their help, you can maximize the riding time with worn out parts.

READ  How to Remove Speed ​​Bike Pedal Sprocket

Roller damper

The dampers consist of a disc (rockring) and rollers. There are also rollerless models, where the chain “calms down” only by the frame. Dual roller versions are used for high speed bikes where each of them corresponds to two chainrings.

Adjusting the derailleurs on a new bike

Slips and inaccurate gear changes under normal wear indicate deranged derailleurs. This problem usually occurs with a new bike, or if the chain and sprockets have recently been replaced.

General scheme for adjusting switches:

The rear chainring still needs to be set to the correct tensioner position to compensate for chain slack.

  • Loosen the screw and remove the drive cable.
  • Set low gears by placing the chain in the 1: 1 position.
  • By turning screw L, the alignment of the guide roller with the star is achieved.
  • Install the cable into the derailleur.
  • Turning the pedals, set the highest gears: the chain on the small sprocket in the back and the largest in the front.
  • Use screw H to match the roller and the active sprocket in the same plane.
  • The correct tensioner position is 5mm from the lowest sprocket in a 1: 1 chain position.

Correct position in the setting of low gears (similar adjustment on the screw H)

Similarly, the front derailleur is adjusted according to the scheme: setting the restrictions on L. adjusting the top gears on H. adjusting the tension of the drive cable. However, first you need to check the coincidence of the switch roller with the plane of the outer stars. Perhaps just setting the rear derailleur will be enough. And of course, checking the operation of the transmission, in particular, the chain tension, in practice.

In principle, adjusting the switches will last for a long time. The correct use of the speed system will help to reduce the wear rate, and the timely elimination of negative factors will allow the transmission to last as long as possible.

Reasons for chain slip and how to eliminate them

Twisting the chain

Description of the problem: The chain is bent due to twisting of one or more links. This can happen when removing a chain that is stuck between the frame and the sprockets, or if it fails to fly off.

I will dwell on this problem in a little more detail, with some departure from the main topic in the direction of anti-advertising.

If my ordeals with breakthroughs and searches for the truth are not interesting to you, go directly to the “elimination”.

The fact is that if you do not know, then you yourself can not guess about the very possibility of twisting the chain, how it happened to me. The symptom of such a defect is periodic chain hops, which have no clear correlation with the gear used and the load on the pedals.

In my case, the inexplicability of the situation began to drive me crazy, especially in light of the very recent replacement.

Realizing that the client was dissatisfied, the guys with an even smarter look began to tell me that the iron was being demolished, that the iron is now of poor quality, solid China (but earlier), etc. In short, they also wanted to sell me a chain cassette system (and two calipers up to a heap, so, let’s shove a sucker).

But this Focus did not work, since there were no visible signs of wear on the hardware, and I changed it quite recently.

The situation was saved by Alexander Osipov from the Spartak cycling club. Without taking a penny from me, he carefully looked at the chain and with his bare hands corrected the twisted link (which took him 40 seconds), after which the bike safely left on this iron for more than one thousand kilometers.

Method of search and elimination: With the elimination, everything is simple here: I selected the desired link, bent the chain at a right angle and straightened it.

How to search? We look along the chain with one eye, slowly turning it. The twisted link in this perspective will be clearly visible.

It’s that simple. Now it’s funny to remember how long I suffered with this problem, so take note, maybe I just saved you a lot of time and nerves.

Reasons for chain slippage through the stars

Transmission misbehavior problems occur under load: pedal pressure when shifting gears. Slippage is especially pronounced when driving uphill, when this load is at its maximum. This pattern is equally true for a single speed bike and a speed bike. Let’s figure out what serves as a prerequisite, and whether it can be fixed.

The reasons why chain links break off the stars are simple and transparent:

  • elongation of links due to wear;
  • the teeth of the rear and front sprockets are worn out;
  • both factors at the same time.

The latter option is most common if the chain or cassette has not previously been changed separately.

Chain length is an indicator of chain wear. The standard size is 304.8 mm. Stretching leads to the fact that the teeth of first small and then large stars are sharpened more strongly, due to which the efficiency of gear shifting on a high-speed bike decreases several times. Especially noticeable lengthening will affect the transition from lower to higher speeds.

If the distance between the chain rollers increases, the width of the sprocket teeth decreases. You can easily notice the development with your own eyes. To calculate the degree of sharpening, the thicknesses of the teeth of a worn and a new sprocket of the same size are compared.

And finally, another reason why the transmission wears out quickly is incorrect gear shifting. For simplicity, let’s remember once and for all:

  • In front, the stars are counted from the smallest.
  • Rear cassette numbering starts from largest sprocket.
  • It is necessary to combine higher gears with higher gears (large stars in front and small ones in the back), and vice versa.
  • Since there are fewer sprockets on the front cassette, there are several sprockets for each sprocket on the rear cassette. For a standard 3X8 system:
Front one 2 3
Rear 1, 2, 3 4, 5, 6 6, 7, 8

Correct use of the gearshift system avoids excessive chain distortion, which would cause tremendous wear on parts.