How to chain a bike at speeds
Types of bike chains
- The least used bicycle chains are in the form of teeth. Sometimes this type is called a toothed belt transmission of a bicycle bike. Comes from an industrial manufacturing industry and is installed exclusively on experimental bicycles;
- Roller chain is often used. Each link has small rollers inside, which makes this design more resistant to wear and tear. However, it is rarely used due to its high production cost;
- Bushing. similar in design to a roller, but differs in a bushing installed directly through the link. The design is used more often than others on the vast majority of bicycles.
How to properly tension the chain on a bicycle if necessary?
The most important element in the design of both children’s and adult professional bicycles is the chain, which determines the quality of the ride, the smoothness of the ride and the smooth gear shifting.
Before tensioning the chain on the bike, you need to make sure that its length is chosen correctly: in the normal state, the chain can be in a slightly free state, sagging by 3 mm, but not more.
In general, the question of how to properly tension the chain on a bicycle is always relevant, since it is part of the mechanism that determines the movement and will often require maintenance due to the large number of rubbing parts.
So, to tighten the chain on a bike that has only one gear, you should, first, turn it upside down, placing it on the seat and steering column.
” Drop out ”. to lower), and move the wheel to one side or the other. After the required chain length is selected, the wheel should be fixed back, making sure that the plane of the wheel axis is parallel to the plane of the carriage shaft (this will prevent the development of the “figure eight“).
It is important to know that it makes no sense to tighten the chain too tightly for two reasons: firstly, it is very difficult to pedal with an excessively tensioned chain, and secondly, complete wear of the chain elements occurs much faster. It is somewhat easier to tension the chain on a bicycle with gears, since it is partially regulated by a parallelogram switch (the gear shifting itself is based on the principle of adjusting the length and stiffness of the chain), however, even the mechanics cannot compensate for a chain that is too long, as a result of which problems with the movement of the bicycle at medium speeds may
To start adjusting the chain length on a bicycle with gears, you must also set it up with the wheels, then switch to the largest sprocket both front and rear, thus determining the top gears
It is somewhat easier to tension the chain on a bicycle with gears, since it is partially regulated by a parallelogram switch (the gear shifting itself is based on the principle of adjusting the length and stiffness of the chain), however, even the mechanics will not be able to compensate for a chain that is too long, as a result of which problems with the movement of the bicycle at medium speeds may occur. To start adjusting the chain length on a bicycle with gears, you must also set it up with the wheels, then switch to the largest sprocket both front and rear, thus determining the top gears.
After that, the rear derailleur should be taken as far forward as possible by the chain, and the chain on the shifting system (where the pedals are) should also be taken slightly forward in order to determine the optimal chain length. Then the chain is released and carefully put on the special teeth.
The idea is that after a complete run of the chain, the mechanical switch will use the rollers to pick up the normal position. It, of course, if desired, can be firmly fixed in one state or another, but in this case, switching will be impossible.
For the chain, it is worth finding such a position in which the axes of the switch rollers, if not connected in one vertical line, are at least close to this.
The chain is stretched due to prolonged use
This happens in the process of wear and tear. The switch spring cannot tension it normally, it constantly sags. In this case, there is only one way out. to replace the circuit with a new one. In practice, it is rare to find bicycles in which the chain is stretched and bounced when shifting gears. It is virtually impossible to restore its elasticity.
How To Fix Bike Chain Skipping/Slipping/Jumping Gears
An easy way to check for tension in a chain
Front derailleur adjustment
The front derailleur is less common than the rear derailleur. Bicycles with this device are cheaper. The front derailleur moves the chain to the stars of the system. Moving from side to side, he pushes the chain to the next star.
Front derailleur device
- Switch frame. A chain passes through it, this is the main element when switching speeds. She moves to the sides in front of the leading stars.
- Parallelogram. the mechanism itself (speed switch). Includes spring.
- Fastening to the frame.
- Upper stop L.
- Lower stop H.
- Fastening the cable.
The main problem with the front derailleur is that the chain hits the frame when driving. You can fix this problem yourself.
How to chain a multi-speed bike
Usually on such bikes as road or mountain bikes, several speeds are set, that is, there are several rear and 1-3 front stars. To act on the principle of a single speed will not work here, since the rear hub does not have the ability to move for poison reasons. In this case, you need to change the number of links in the bike chain. Therefore, in order to adjust the bike chain, you first need to find out how well it works. After which it will be clearly required to lengthen or shorten the number of links.
To tighten the bike chain, count the required number of links, which are redundant and disconnect it using a squeeze. After removing the pin, remove the excess number of links and assemble everything in the reverse order. Connect the links with a squeeze or lock.
Improper chain maintenance is the cause of an accident
In the event of a collapse or breakage of the bicycle chain, with the best outcome, the driver will get off by not being able to continue to ride. But often with this there are more serious consequences. For example, if there is no special guard on the rear wheel, the chain can fall into the spokes, but here the outcome is unfavorable in all cases. Under any combination of circumstances, the spokes of the rear wheel will be bent, and an eight will form on it, and the repair of such a breakdown will cost a pretty penny. And there is also a danger that the driver will injure himself or pedestrians, as his rear wheel will jam.
White plastic guard prevents the chain from entering the spokes
The next danger in the event of chain breakage or loosening applies to those bicycles that do not have a handbrake. Since here the entire braking system is located in the rear wheel carriage, therefore, the driver will no longer be able to brake in the usual way. It’s even scary to imagine if this happens at high speed.
How to chain a speed bike or mountain bike
The chain can fly off 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.
Fixing A Sagging Bike Chain
If there are no breakdowns, then the problem is with 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.
The chain slipping off the largest chainring in the rear derailleur indicates that you need 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 switch stars 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.
Tighten 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 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!
How to put a chain on a bike with speeds
The reasons why the chain often flies off the bike sprockets can be:
- Loose chain tension is the most common cause.
- Deformation of one or more links. One “broken” link is enough for the chain to slide off, the reason for their appearance may be blows, careless handling of the owner, frequent falls of the bike.
- Severe wear of the sprocket teeth. Deformation is caused by impacts, severe wear of elements. If the reason for the constant fall of the circuit is this, the best solution would be to replace them with new ones.
- Extension of the chain. This phenomenon is usually seen on multi-speed bicycles.
- Rear derailleur set incorrectly.
Putting on a chain is a simple task that even a novice owner of a two-wheeled vehicle can handle. If a guard is installed, it must be removed to make it easier to reach the rear sprocket. Then the chain is put on the rear sprocket, while the pedals are turned in the direction of travel. When they rotate, the chain itself will throw itself on the rest of the teeth.
How to put a chain on a bike with speeds
Owners of two-wheeled vehicles can always count on the help of a foreman who will perform maintenance, eliminate detected breakdowns, and adjust the operation of individual components that are out of order. But often, there is not enough time to turn to professionals for help, and the cost of their services can be rather big.
Many cyclists are faced with the need to adjust the bike’s rear derailleur. It is worth noting that heavily worn derailleurs are often so frayed that even a beginner cyclist can notice the resulting backlash, which will be impossible to eliminate. If the switch still retains “signs of life”, you can adjust it yourself. Reasons for when a switch needs adjustment may be:
- incorrect setup or lack of it when buying a bike;
- the fall of the bike, its improper transportation;
- contamination of the transmission during the operation of the bicycle.
Which chain lubricant to choose
The bicycle chain, like other parts of the vehicle, needs lubrication. To do this, you need to use special formulations produced in different forms. Many people wonder which bicycle chain lubricant is best, which tool to choose to ensure smooth operation of the transport. Today, bike owners can choose from a variety of lubricants:
- Aerosol lubricant. Through a special tube, the liquid composition is distributed over the surface of the parts. Aerosols are very handy when you need to treat hard-to-reach areas. However, they are designed to process the hinges of the derailleurs, brake jacket, such compounds are not suitable for the chain.
- The best choice for a bicycle chain is a liquid lubricant. Poured into a small bottle, you can take it with you and use it when needed. In addition, solvents are added to liquid lubricants, which greatly improves their penetration. After the solvent has completely dried, the grease thickens.
- Dry lubricants are applied to the chain in a liquid state, after drying, they form a white coating. The advantage of such lubricants is additional protection of the chain from dust and dirt. However, it cannot be used in wet weather conditions.
The most versatile, due to the fact that it forms the thinnest film on the surface of the chain, is Teflon grease. The film effectively copes with the protection from dust and dirt.