How to set up a Shimano front derailleur on a mountain bike
Statistics say that the front “shifter” requires less maintenance than the rear one. Simplicity of design is also on the “front” side. Why, then, there are a lot of questions when installing and setting up this unit. What is the capriciousness of the front crossover? And in the end, how to do the work so that the result does not cause discontent and criticism.
How to fix defects
The speed switch will work perfectly and the bike itself will be with a new (or not very old) cable, with absolutely intact shirts (and not dry!) And not deformed (or in a small volume) stars and chain.
If the cable is just stretched, then you just need to pull it up. But if the cable breaks, then you cannot do without replacing this element. The process of replacing the cable is not difficult, the main thing is to strictly adhere to the recommendations of the specialists:
- unscrew the cable fixing screw, which is located on the cross-over;
- pull the cable out of the shirts;
- if necessary, disassemble the shifter and pull the cable out of it;
- a new cable must be inserted into a special groove in the shifter, and it is the metal tip of the cable that must enter into the groove;
- lubricate the entire cable with a special grease, you do not need to spare the consumable;
- pass the cable through the shirts;
- there are special grooves on the frame, into which shirts are tucked;
- fasten the cable with a screw on the front end.
In case of poor gear shifting, pay attention to the return spring. it must be clean and lubricated. To achieve this, you just need to rinse the spring under running water, dry it completely and lubricate it thoroughly.
If the frame of the rear derailleur is crooked, then this can only mean one thing. the cock is bent. If this is not critical, then you can correct the cock with your hands. you need to take the rear switch in your hand, which is fixed on the cock, and hold the frame with the other hand. Slowly pull out the problematic transmission element (cock) until relatively even setting.
Note: this “repair” of the cock is a temporary solution to the problem of shifting gears. The fact is that the rooster is a consumable that needs to be changed in time, and not constantly repaired / pulled.
In some cases, the bike owner pays attention to a deformed rear derailleur (the front derailleur rarely suffers on impact). it can also be returned to its original position with the help of hands. But if the rear derailleur is deformed too much, then it is advisable to replace it.
Note: After performing specific manipulations to repair bent / deformed parts, you should not use the bike for too long. this may end in a fall, another breakdown at the most inopportune moments. And in some cases, such carelessness can lead to a traffic accident.!
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.
Multi-speed bikes with one sprocket in the front. is it worth buying?
The three-star fashion ended with the arrival of 10, 11, 12-speed cassettes. The fact is that on 3×7-3×9 transmissions, three toothed gears in the front perform an important function. they overlap the gear ratios, allowing you to climb hills and screw on descents.
The number of teeth on the new multi-star cassettes has been matched to do the same with one sprocket at the front. Therefore, it makes no sense to use two more asterisks. For the XC discipline, this is a significant breakthrough, as the frontal override here is the most unreliable part of the bike.
How to adjust gear shifting on a shimano bike
Why the chain does not move to the front large sprocket
If the chain goes from the 1st sprocket to the 2nd chain without hindrance, but does not switch from the 2nd to the 3rd, then the matter is in the wrong boundary position of the front crossover. You can knock it down during the repair process:
- Incorrectly selected carriage cartridge: the length of the shaft does not correspond to the passport documentation for the bicycle.
- The limiter for moving the frame along a large star (bolt H) is incorrectly set.
Change the sprockets on the rear wheel of the bike
The drivetrain plays a very important role in the operation of the entire bike, so you must carefully monitor the wear of individual parts of it. This is especially true for the rear wheel sprockets, which fail over time. A worn out sprocket must be replaced as soon as possible, and it will not be difficult to do this.
Before starting the replacement process, get yourself the tools you need to use. It:
- Cassette remover
- Rozhkova and adjustable wrenches
First, remove the rear wheel from the bike. This is very easy to do. Unscrew the nut with a wrench and release the chain. Owners of mountain models just need to press on the special mount and the wheel will be dismantled. Next, we install a removable device on the slotted nut of the cassette. Here we need a whip to prevent the cassette from turning. While we rotate the puller with an adjustable wrench, hold the largest star with a whip.
Using a nut, unscrew the cassette and remove it from the wheel. We carefully examine the stars and determine which one has become unusable. Start with the smallest and end with the largest. The bike drivetrain is designed in such a way that you can only replace the worn out sprockets and not the entire cassette. Therefore, having examined the cassette, you remove the used parts from it and replace them with new ones. It is very easy to pull the star out of the cassette, this is facilitated by special rivets. The main thing is to carefully remember the order of the stars, so as not to get confused with their installation back. In the configuration of some bikes, you may find so-called “spiders”. It is a group of several stars that are inextricably linked. In this case, you will have to replace the entire spider.
Many cyclists are faced with the following problem. After replacing several stars, there is great discomfort in the operation of the chain. This is due to the fact that the chain has already passed a certain mileage, has worn out and now it is difficult for it to interact with new parts. Therefore, experts recommend the simultaneous replacement of the chain and worn sprockets. This greatly minimizes the complexity of your bike’s drivetrain.
If you own a single speed bike, the process of replacing the rear chainring will be simplified to a minimum. You just need to open the retaining ring. If your own ring has become unusable, it must be replaced immediately, even if you are not going to replace the stars in the near future. Otherwise, the chain will lose its fixation, and this threatens with backlash. The process of replacing the ring is very simple, you do not need to perform the slightest forceful manipulations. Therefore, if you are talking about a single-speed bike, everything is very easy and understandable here. However, the owners of such models should carry out the process of dismantling the cassette only if one or more of the largest stars have worn out. If a small asterisk starts to fail, this is not a cause for concern.
Whatever you ride, remember that both the simplest road bike and the super-fast bike need a proper transmission. A badly worn chain and stars will not allow you to drive even a couple of meters. Pay close attention to the mechanics and promptly replace worn-out parts. A working bike is the main guarantee of your safety and a cool, trouble-free ride!
Grip Shift cable replacement. Most models
Removing the ratchet. replacing rear sprockets on a bicycle.
There are still many entry-level speed bikes on sale today that mount a regular threaded hub. under the ratchet.
To install such stars, no additional tools are required, since it itself is tightened when driving, due to the force through the chain. The more torque we apply on the pedal, the more the hub will tighten, so sometimes a lot of force is needed to remove the ratchet. In order to remove the rear sprockets, we will need a tool. puller.
Next, we insert this tool into the bushing (hole) of the ratchet. Then we take the key and unscrew it counterclockwise, basically the pullers go on a turnkey basis for 21, it will be more convenient to take a socket wrench, since it will be easier to give it maximum force to remove the sprockets. It so happens that in order to remove the sprockets, it is necessary to use a pipe or extension on the socket wrench knob in order to give the required force.
How to remove rear sprockets from a bike
- Bicycle, new rear wheel, tool kit
If you decide to replace the rear wheel of your bike, decide which brakes are installed. The sequence of your actions depends on this.
If the brakes are disc brakes, no special operations are required. But the rim brakes will need to be released first. If this is not done, then you simply cannot remove the rear wheel.
If your bike has V-BRAKE brakes, start by squeezing the pads. This will make it possible to remove the arc. It is necessary to squeeze at the point of attachment of the cable. To perform this operation, special efforts are not required.
Turn the bike upside down by placing it on the handlebar and saddle. Beforehand, you should remove the navigator, travel computer or other valuable equipment.
Before carrying out work, you need to take care of the gearshift knob and the brake lever. Place a soft cloth underneath. This will protect the devices from damage.
If a hydraulic brake is installed, do not keep the bike upside-down for a long time. It is possible that you will take a long time to change the wheel. Remember that air can enter the hydraulics. If this happens, you need to bleed the brakes.
The cleaning procedure for hydraulic brakes is quite time consuming. Of course, you don’t need to bleed the brakes, but then they will not work properly. This cannot be allowed.
The rear wheel of the bicycle is fixed to the axle. There are different mounts, the sequence of your actions depends on its type. If the mount is wrench, a pair of wrenches are required to work. Tighten the nut, unscrew the second with another wrench.
It is not necessary to completely unscrew the nut. Turn the key a few turns. After that, the wheel can be removed quite easily.
If we talk about the eccentric, then removing the wheel will be even easier. You just need to unscrew its lever. After that, you need to twist it counterclockwise. You can remove the wheel.
Be aware of the chain running through the bike’s gearshift system. Carefully remove it from the sprockets, leaving it against the frame.
Grasp the wheel and pull it up, it will come out effortlessly. Pay attention to the next point. If your bike has disc brakes, you do not need to press the handle with the wheel removed. The fact is that such manipulations lead to compression of the pads.
Loosen the pads. Only after that start installing the wheel. Returning the rear wheel to its place, do all the steps in reverse order.
Star stripping process
How to change the rear sprocket on a bike after the first stage has already been passed.
- Removing the mount.
- Detach the cassette from the rear wheel.
- We make a thorough inspection.
- Determining Wear Sprockets.
- We remove the worn out product.
- Pay attention to the arrangement of the stars and the sequence of fasteners and washers between them.
Cassettes compare favorably with ratchets in that each worn part can be freely removed separately.
A separate recommendation would be to replace the chain, which is also worn out, along with the sprocket.
Bicycle sprocket design
The mechanism externally has several stars of different sizes, which are fixed with a bushing. After that, everything is connected with a lock nut.
- The usual version is that the stars are connected to each other by a plastic spacer;
- Spider cassette. cassettes made in the form of stars, fixed on an aluminum frame;
- On several spiders. devices that have a high cost and are usually installed on professional and expensive models. The appearance has 2 spiders, which are connected by sets of stars;
- X-Dome is a monolithic system that connects the drum to the lid on the opposite side;
- OpenGlide. Most Relevant for Road Bikes.
Changing the sprocket on the rear cassette
The set of transmission stars of the rear wheel is several times larger than the front one. The standard kit includes eight components, and in high-speed models (or on a sports bike) there are 9 or 11.
It is worth mentioning right away that a cassette or ratchet can be placed behind. The cassette is a modern version with an internal splined mounting on the hub axle. Ratchets, as an outdated option, can only be found on a budget high-speed bike. The set usually includes 5-7 gears. External fastening, threaded, removable tool differs from cassette.
The fundamental difference from the cassette is its integrity. it is impossible to change the star separately on the ratchet. Here, either all at once, or nothing at all. Therefore, we will consider how to install a new sprocket on the cassette.
As with replacing the leading stars, special tools are required here:
Brake Lever Mounting & Positioning. Drop Bars
- cassette remover;
- chain whip-retainer;
- adjustable wrench or head;
- optional: wrenches, chain release.
When removing the cassette, you will need to first remove the rear wheel from the bike and then the axle nuts. At the same time, when replacing the sprockets, you can also clean the chain. to remove it, you need a squeeze.
Sequence of work: 1. Remove the rear wheel with a 15 wrench, with eccentric fastening everything is simple. unclench the lever and loosen the fixing nut.
The next step is to unscrew the axle nuts. You will need a 17 key for it. To roll the mount off the rotating axis, we put on an additional nut to fix the axis.
Unscrew the bearing cone and pull out the bearing from the opposite side.
Remove axle with taper and bearing. About the bushing components: if necessary, you can immediately replace them with new ones.
Place the whip on the largest (lowest) star. We will rotate it clockwise.
Use an adjustable wrench or a head to turn the puller counterclockwise.
It is so easy to shoot a cassette at home. Most modern star sets are collapsible, you can install one or two new stars. However, in case of severe wear, when half of the cassette is worn off, it makes no sense to change them separately. Difficulties can also arise if the largest sprocket has been erased, on which all the others are usually attached.
Is it possible to dismantle a cassette without a puller and a whip? In principle, this can be done with a slotted tube and a spanner. The whip can be made by yourself by welding a piece of an old chain to the metal handle of the knife.
When replacing individual stars, especially the middle ones, we disassemble the cassette carefully so as not to lose all the spacer and fixing washers. Everything is easier with a cassette on a spider. it does not need to be disassembled, the star is removed separately from its mount.
Rear transmission assembly:
- Put and fix a new star, assemble a cassette.
- Using a puller, install the drum on the spline mount of the sleeve. Before tightening, it is necessary to align the drum so that the connection does not wear out under load. The whip is not needed here. just rotate the puller clockwise with effort.
- Assemble the bushing: insert the axle from the cassette side, then the bearing and the cone on the left side, fix the axle with nuts.
- Put on the chain and put on the rear wheel.
Check the operation of the transmission and adjust the rear derailleur. Timely replacement of sprockets will save you from unpleasant surprises on trips and will generally increase the resource of the bicycle transmission.
Stages of installing new stars
How does assembly work when replacing a bicycle cassette chainring?
- Install a new sprocket and fix it.
- We assemble the cassette completely in the reverse order.
- Using a puller, mount the drum to the slotted area.
- The drum must first be leveled.
- Next, we carry out the process of assembling the bushing. All actions described in the first paragraph are carried out in reverse order.
- Install the rear wheel and fix it securely.
- Put on the chain.
It is imperative to check the smooth operation of the transmission. This procedure involves adjusting the rear derailleur.
If everything is carried out according to the proposed instructions, feel free to get on the bike and enjoy the ride.
How to remove sprockets from the rear wheel of a bicycle?
It is absolutely not difficult to disassemble the device for replacement, but you should be careful and have a couple of free hours in stock.
In some situations, the disassembler initially spends 15 minutes, and another person without the necessary skills can handle it in 1-2 hours.
That is why it is difficult to answer the question of how much time can be spent on a laborious process. In most, all stars have the same parsing method, since they have almost the same structure.
Helpful hints for parsing:
- How the parts are removed, in this order, they should be installed. This advice will help from confusion and waste of extra time, which can be spent remembering where a certain detail came from;
- After parsing, every detail needs to be inspected, perhaps it does not require replacement, but a banal cleaning is simply necessary.
How to remove the front wheel?
Now carefully turn the bike upside down. In this case, it turns out that he stands on the handlebars and saddle quite stable. At this stage, you should carefully monitor so that the equipment attached to the handlebars (bike computer, bell, bike headlight, etc.) is not damaged. In addition, it is best to place a cloth under the gear selectors to avoid scratching them. If your bike has hydraulic disc brakes (a hose with brake fluid comes from the brake lever, and not a regular shirt with a cable), then it is not recommended to keep the bike upside down for a long time, in order to avoid air getting into the hydraulic line, since if this happens, you will need to pump brakes (although the process is not complicated, but rather laborious).
Next, we look at how the wheel is fixed to you: is it an ordinary nut or an eccentric (small lever).
3.1. If your wheel is secured with a nut, then you need to take two suitable keys. Throw one on one side, the second. on the other, and turn one of the keys counterclockwise, holding the other in place. It is not necessary to unscrew the nuts all the way, but simply loosen until the wheel can be safely removed.
3.2. If your wheel is fastened with an eccentric, then everything is generally simple. no tools needed. We pull this eccentric towards ourselves, as shown in the figure, after which it is necessary to unscrew it a little more counterclockwise, holding it on the back side with your hand until it becomes possible to pull out the wheel.
At the last stage, just pull the wheel up, and if you did everything correctly, it can be easily removed. On bicycles with disc brakes, do not press the brake lever with the wheel removed, as this may compress the pads, and you will have to tinker with them too.
Installing the front wheel
As you perfectly understand, the process of installing the front wheel is the opposite of removing it and it makes no sense to describe it in detail.
We put the wheel back, as it was. Do not confuse the direction of rotation of the wheel (written on the tire). Remember that your bike is overturned and it is worth considering the direction of travel. In the case of disc brakes, it is difficult to confuse, since it is necessary that the disc hits exactly between the pads.
We tighten the nuts or tighten the eccentric
If you have rim brakes, you need to return them to their original condition. We check that the wheel does not dangle, turns freely and the brake functions, otherwise we check everything again point by point.
How to remove the rear wheel?
The rear wheel removal process is COMPLETELY the same as the front wheel removal process. You don’t even need to look at the equipment attached to the rear (you only have to remove the chain from the axle if it gets caught).
How to remove the speed knob on a bicycle
Some novice cyclists ask the question of how to remove a wheel from a bicycle. over, difficulties arise, as a rule, with the rear wheel. Quite often you can hear such phrases: “Oh, I’m afraid to take off the rear wheel, there are so many things screwed up, screwed up, I will never put it back on and I will definitely break something. I’ll go to the service center.” Of course, you can do this, but than repeatedly spending your time and money for going to bicycle repair, it is easier to just figure out how to do this operation on your own, especially since such a need may arise somewhere in the forest outside the city, and a bicycle workshop there it will definitely not be found.
Installing the rear wheel
The installation process is also similar to the installation of the front wheel, with a few exceptions: it is necessary that the chain fits correctly. To do this, we bring the wheel to the attachment points, put the chain on the sprocket and then put the wheel in place. True, a situation may arise in which it seems to you that the chain is twisted, and in order to unravel it, you will need to remove it. This is not true. You just need to twist it back and forth, imagine how it was installed before on the stars and most importantly. do not panic. That seems to be all. Now you have mastered the art of removing and installing wheels.
Removing the chain from a bike
Maintenance: DIY bike chain repair
Two-wheeled vehicle repair skills will help riders deal with difficult issues quickly and efficiently. The most common question of concern is how to remove the chain from the bicycle. At any time, unforeseen situations or the need for maintenance of equipment may arise and therefore several recommendations will help.
Removing an element with a lock does not take much time and effort. Today there are several varieties of this bicycle chain device, but the principle of their opening is similar. It is necessary to close the axles and remove the cover. For convenience, you can use pliers, it is also good if you have pliers for opening at hand. Thus, the whole procedure does not take much time and it will be possible to quickly remove the malfunction, change the part or remove the chain from the bike.
If there is no lock, then you need to make some effort. For work, you need a special squeeze. It is a tool with which it is very convenient and easy to squeeze out a pin. To work, place the chain link so that the release axle is directly opposite the pin. Then you need to twist the handle and squeeze out the pin itself. It is very important not to allow it to pop out, otherwise it will be very difficult to insert the pin into place correctly. Further, the bicycle chain can be replaced or repaired.
There are also some points to consider when working. For example, there was repeated removal of the same bicycle chain, then the next time it is necessary to open another link and segment, because after this process it loosens a little. Also, some models of pomace may have two seats and you need to fasten the link carefully, correctly and carefully.
When is it necessary?
This procedure may be needed at the following points:
- Replacing the old part with a new one;
- Installation of new speed switches on the transport;
- To make the chain shorter;
- To clean the element.
Design and its features
A bicycle chain is a fairly simple metal structure that is designed to transfer the drivetrain from the drive sprocket to the driven one. Component elements:
The main difference between the different types is the distance between the rollers and the width. In some modes of transport, this part may be part of the gearshift system. This detail is important and requires special attention.
A bicycle chain requires regular maintenance, cleaning and repair to function properly. Periodic lubrication and flushing will ensure that the equipment works well, and every few thousand kilometers the chain must be replaced with a new one. There is also a certain indicator of the degree of elongation (0.5%), that is, the pores when a new part is needed. Without special tools for measuring, you can determine the degree of wear as follows: you need to install the element on the largest sprocket (leading) and pull it off, moving it away from the teeth. If the resulting space contains more than 4 teeth, then the bicycle part must be urgently replaced.