How to assemble a derailleur on a shimano bike

SHIMANO SWITCH

However, the shifter is a kind of “heart” of the transmission system and, for the most part, it is he who is responsible for the quality of gear shifting. Today, a limited number of companies are involved in the production of high-quality derailleurs, and the most popular among them is the Japanese giant. Shimano.

To make it more convenient for customers, all Shimano derailleurs are divided into groups. Let’s dwell on each of them in order:

derailleur, shimano, bike
  • Shimano Tourney is the easiest beginner derailleur. They are distinguished by their low cost and high reliability. Bicycles equipped with components of this class are designed to be used at a leisurely pace on the track or on tightly packed ground. This Shimano derailleur cell needs constant adjustment and starts to fail if too much dirt gets on it. Fits Shimano 2300 Road Group.
  • Shimano Altus / Acera is also the entry-level equipment. But Acera derailleurs are already installed on bicycles designed for use in sand and mud, naturally only at the amateur level. For those people who, for whatever reason, cannot get more expensive options and ride both on the ground and on the asphalt, this type of Shimano derailleur is ideal. Fits Shimano Sora Road Group.
  • Shimano Alivio. This group of equipment is something in between, it cannot be called professional yet, but it is no longer amateur. Equipped with Alivio derailleurs, the bikes are great for recreational riders and cycling trips. This Shimano derailleur group is reliable and unpretentious. The price-performance ratio in this group of switches is implemented most successfully. Fits Shimano Tiagra Road Group.
  • Shimano Deore is a professional line of derailleurs, but if you look at things soberly, the differences from the Alivio are not that great. All that changes is the indicators of lightness and reliability, they get a little better, but the price rises significantly. Fits Shimano 105 Road Group.
  • Shimano Deore SLX and XT are lightweight and reliable professional equipment. The reliability of the Deore SLX / XT derailleurs is clearly reflected in the cost: the price of a Shimano Alivio rear derailleur is approximately 45. and the Deore costs between 90 and 110 Ideal for professional athletes to train every day. Fits Road Groups. Shimano Ultegra and Ultegra Di2.
  • The Shimano Deore XTR is the ultimate racing equipment. Not afraid of any stress. Extremely expensive. Fits Shimano Dura-Ace Road Group.

Shimano doesn’t just make derailleurs for mountain and road bikes. There are many derailleurs available for touring, city and adventure bikes. But we do not consider them, since these bicycles are not popular in the CIS.

ADJUSTMENT AND ADJUSTMENT

Sooner or later, any bike enthusiast begins to notice that the gearshift system emits extraneous sounds, such as crunching, rumbling, and so on. It happens that during a gear change, the chain jumps a couple of sprockets or the opposite situation: you cannot switch to the required sprocket. So what’s the deal? You just do not have gear shifting configured. So how do you set your bike speeds? Let’s try to figure it out.

The gearshift setting can get lost due to the fact that you are not familiar with the gearshift rules and are switching them incorrectly. Or your gearshift system is simply too dirty and needs to be flushed out. But the reasons are a separate conversation, and we will focus on setting.

We will not go into the nuances of professional tuning. professional cyclists are unlikely to search for speed settings on the network. Therefore, let’s move on to a short course on speed tuning:

  • Fix your bike upside down (using a special stand or simply placing it on the handlebars and seat). The speed setting is carried out using special bolts on the switch.
  • Now you need to set the chain in the leftmost positions (on the large chainring and small rear). After that, unscrew the part that serves to fix the cable to completely unhook the cable.
  • Now, tightening one of the bolts on the gear selector, you need to adjust the two gears so that they are opposite one another. You will know which bolt to turn by the “H” or “High” mark next to it. What does high speed mean?
  • After that, we install the chain in the rightmost positions of both stars (on the largest rear and smallest in front). Adjust the gears again with the second screw, which is marked “L” or “Low”. Installing stars in one line.
  • Now, you need to install the chain on the middle sprockets at the front and rear and adjust the gear shifting as precisely as possible using a screw called a “thumb” and located directly on top of the cable. It must be remembered that our goal is to ensure that the middle gears are opposite one another. Before you start twisting the “lamb”, it is better to perform a test drive, which will give an idea of ​​how difficult it is to switch or, conversely, too easy.

Putting the asterisks one opposite the other, do not worry if there are slight inaccuracies, plus or minus a couple of millimeters does not affect anything: the system does not provide such accuracy. But still, the gear changes will be slightly better if the stars are aligned. For this reason, after the test drive, it will become very clear where exactly you need to do more detailed settings.

derailleur, shimano, bike

Rear Derailleur Replacement

CORRECT SWITCHING

Correct gear shifting is determined by one main rule, the observance of which is very important. when driving, you need to make sure that the chain does not twist. This can happen if the chain is engaged at opposite extreme positions of the chainrings and chainrings. With this arrangement of the chain, it clings to all possible and impossible obstacles, is exposed to uneven load and wears out much faster.

Here are some tips to help you switch gears correctly:

  • Better not to switch gears when driving downhill. The first thing that will happen to you is the loss of your riding rhythm, which will affect your stamina and movement speed, respectively. This is also not worth doing, since when going uphill, the chain tension is already quite high, and if at the same time throwing the chain between the stars Such actions will have a detrimental effect on the resource of parts, and, soon, a breakdown may follow. So you need to switch gears before lifting, at the moment of the greatest relaxation of the chain.
  • A huge number of cyclists rarely use the front derailleur on their bike. It is difficult to answer why it happened so, but, nevertheless, it is a fact. It is much more efficient to use forward gear when driving on a road that sharply changes its slope. One shift on the chainrings, in this case, will have more effect than two or three changes on the rear. Just put the chain in the back on the middle sprocket and shift the front.
  • When a fairly serious descent is planned on your way, then, again, switch gears before starting to go down. This is due to the fact that when the process of driving downward begins, it is better not to be distracted from the brakes, and you will need to follow the road especially carefully, because falling on the descent is an unpleasant thing.
  • Gear shifting should be smooth. There should be no rumbling, rattling, knocking or other extraneous sounds. If you follow this, then the gearshift system will serve you for a much longer time.
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How to properly adjust the rear derailleur

To independently adjust the rear derailleur on a bicycle, you just need to strictly follow the step-by-step instructions from specialists in this process. So, follow all the steps:

  • Move the chain to the small sprocket with the right shifter.
  • Unscrew the fixing screw and release the cable.
  • Find the screw marked “H”. Use a screwdriver to adjust this screw so that the smallest star lies in the same plane with the rollers, which are located in the foot (frame).
  • Pull the cable by hand and fix it with the screw.
  • Check the operation of the switch, and if it does not work correctly, the chain does not switch well to large stars, then you need to tighten the cable harder (either with the help of a drum or with a switch).
  • Move the chain to the largest sprocket available in the cassette.
  • Find the screw marked “L” and adjust it so that the tab (frame) and the sprocket are in the same plane. in this case, the crossover will not be able to get into the spokes of the front wheel.

ADJUSTING THE FRONT SPEEDS OF THE BIKE

You need to adjust the forward speeds in about the same way, there is nothing difficult there, and you can figure it out at the level of intuition, therefore, we will consider only some points. The chain runs along the chainrings with a metal stop that can be adjusted with two bolts. The principle is the same, so, as mentioned earlier, there is nothing complicated about it. And, again, in order not to suffer again with the setting, switch the speeds correctly, as described above.

Adjustment

Before adjusting the rear derailleur, clean and lubricate the derailleur itself, rollers and chain, and remove all debris from the cassette.

For conventional Shimano RapidRise / LowNormal derailleurs and derailleurs, which include the entire Comfort range (C050. C900 and Nexave), and some of the older XTR, Deore XT, Deore LX and Deore derailleurs, some of the actions will be exactly the opposite. Here’s how to adjust a conventional gear derailleur. In my humble opinion, the return to traditional switches in 2007-2009 is fully justified.

  • Loosen the tension on the cable with the adjusting pin or similar pin on the shifter.
  • Install the chain on the small sprocket of the cassette and, turning the stopper H., set the frame with the rollers so that the plane of the rollers exactly coincides with the plane of the small sprocket of the cassette. By screwing in the screw, you move the frame towards the center.
  • Switch to the largest sprocket and, turning the stopper L., set the frame with the rollers so that the plane of the rollers exactly coincides with the plane of the large sprocket of the cassette, while pressing the switch towards the spokes with the lever. By screwing in the screw, you move the frame towards the center.
  • Place the chain on the smallest sprocket at the front and the largest sprocket at the back. Using the roller position adjustment screw, ensure that when pedaling backwards, the roller does not touch the teeth of a large sprocket, but is only 3-5 mm away from it.
  • While pedaling, try shifting gears to both sides one at a time. If the chain does not come off well from large stars to small ones, it is necessary to loosen the cable by rotating the cable tension adjustment boss clockwise. Otherwise, vice versa.

After you get a crisp shift, take a little ride. Under load, the switching clarity is slightly lower. Adjust if necessary.

ADJUSTMENT AND ADJUSTMENT

Sooner or later, any bike enthusiast begins to notice that the gearshift system emits extraneous sounds, such as crunching, rumbling, and so on. It happens that during a gear change, the chain jumps a couple of sprockets or the opposite situation: you cannot switch to the required sprocket. So what’s the deal? You just do not have gear shifting configured. So how do you set your bike speeds? Let’s try to figure it out.

The gearshift setting can get lost due to the fact that you are not familiar with the gearshift rules and are switching them incorrectly. Or your gearshift system is simply too dirty and needs to be flushed out. But the reasons are a separate conversation, and we will focus on setting.

We will not go into the nuances of professional tuning. professional cyclists are unlikely to search for speed settings on the network. Therefore, let’s move on to a short course on speed tuning:

  • Fix your bike upside down (using a special stand or simply placing it on the handlebars and seat). The speed setting is carried out using special bolts on the switch.
  • Now you need to set the chain in the leftmost positions (on the large chainring and small rear). After that, unscrew the part that serves to fix the cable to completely unhook the cable.
  • Now, tightening one of the bolts on the gear selector, you need to adjust the two gears so that they are opposite one another. You will know which bolt to turn by the “H” or “High” mark next to it. What does high speed mean?
  • After that, we install the chain in the rightmost positions of both stars (on the largest rear and smallest in front). Adjust the gears again with the second screw, which is marked “L” or “Low”. Installing stars in one line.
  • Now, you need to install the chain on the middle sprockets at the front and rear and adjust the gear shifting as precisely as possible using a screw called a “thumb” and located directly on top of the cable. It must be remembered that our goal is to ensure that the middle gears are opposite one another. Before you start twisting the “lamb”, it is better to perform a test drive, which will give an idea of ​​how difficult it is to switch or, conversely, too easy.

Deformation of the switch

A common cause of such a breakdown is a blow from a bicycle. Usually the rear derailleur suffers, the front derailleur is very difficult to bend. After a breakdown, it is worth checking which parts are broken.

  • If it is a frame. align or change the part.
  • If the screw that adjusts the chain tension or the eyelet that secures this screw breaks, then it is better to replace the parts. Otherwise, the speeds will switch very badly.

Rear derailleur cock

If, when the chain is on any one sprocket in front, the gear change from the rear is smooth, and when changing to another front sprocket, it becomes difficult to shift, then, most likely, the cock is bent on the bike.

The rear spreader, located down and away from the frame, is more prone to breakage than other parts of the bike when riding over logs or curbs. In the event of a fall, both the parallelogram switch itself and its mounting may bend from a side impact. If the rear parallelogram is attached directly to the frame, then it can break. If the switch is put on special fasteners, then it itself can remain intact, and the cock will bend, as a rule, towards the spokes.

In order to determine if the cock is bent, and the rear derailleur at the same time, it is enough, sitting down behind the bike, to look at the position of the derailleur. Two rollers of the chain tensioner must be in a strictly vertical plane in relation to each other.

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Under no circumstances should you try to straighten the bent cock by grabbing the rear derailleur. The spreader frame is very fragile. First, it is she who will begin to bend, and not the deformed fasteners. It is a good idea to completely remove the cock from the bike to align it on the plate. Better yet, use a special tool with which you can accurately straighten the bent mount directly on the bike frame. This tool works like a lever and has a pointer showing how accurately the cock is vertically aligned.

Setting and adjusting

Sooner or later, any bike enthusiast begins to notice that the gearshift system emits extraneous sounds, such as crunching, rumbling, and so on. It happens that during a gear change, the chain jumps a couple of sprockets or the opposite situation: you cannot switch to the required sprocket. So what’s the deal? You just do not have gear shifting configured. So how do you set your bike speeds? Let’s try to figure it out.

How to Change Your Rear Derailleur. Replacing Your Bike’s Rear Mech

The gearshift setting can get lost due to the fact that you are not familiar with the gearshift rules and are switching them incorrectly. Or your gearshift system is simply too dirty and needs to be flushed out. But the reasons are a separate conversation, and we will focus on setting.

We will not go into the nuances of professional tuning. professional cyclists are unlikely to search for speed settings on the network. Therefore, let’s move on to a short course on speed tuning:

  • Fix your bike upside down (using a special stand or simply placing it on the handlebars and seat). The speed setting is carried out using special bolts on the switch.
  • Now you need to set the chain in the leftmost positions (on the large chainring and small rear). After that, unscrew the part that serves to fix the cable to completely unhook the cable.
  • Now, tightening one of the bolts on the gear selector, you need to adjust the two gears so that they are opposite one another. You will know which bolt to turn by the “H” or “High” mark next to it. What does high speed mean?
  • After that, we install the chain in the rightmost positions of both stars (on the largest rear and smallest in front). Adjust the gears again with the second screw, which is marked “L” or “Low”. Installing stars in one line.
  • Now, you need to install the chain on the middle sprockets at the front and rear and adjust the gear shifting as precisely as possible using a screw called a “thumb” and located directly on top of the cable. It must be remembered that our goal is to ensure that the middle gears are opposite one another. Before you start twisting the “lamb”, it is better to perform a test drive, which will give an idea of ​​how difficult it is to switch or, conversely, too easy.

Putting the asterisks one opposite the other, do not worry if there are slight inaccuracies, plus or minus a couple of millimeters does not affect anything: the system does not provide such accuracy. But still, the gear changes will be slightly better if the stars are aligned. For this reason, after the test drive, it will become very clear where exactly you need to do more detailed settings.

Rear derailleur fine adjustment

From time to time, you will have to fine-tune the rear spreader in the following cases:

  • If repairs, replacement, adjustment of chain drive units were carried out.
  • New cables and shirts installed on the bike.
  • Low-quality cables stretch a lot during operation, and plugs are squeezed out of the jackets at the ends.

Switch adjustment is performed by unscrewing the hollow cable tension screw half a turn to the left. It is easier to unscrew the screw when the cable tension is released. when the shifter is reset to the highest speed. Be sure to check the accuracy of the installation while riding a bike.

That’s all about setting the rear derailleur. If you follow all the guidelines here, the rear de-clutter on your bike will work like a Swiss watch. But in no case should you suffer with an overly stubby switch. Better to replace it with a new one.

Setting up bike derailleurs (beginner’s guide)

So, let’s continue our series of articles for beginners. Recall that in previous articles we looked at how to care for your bike and shift gears correctly on the move. In this article, I would like to make a short guide to self-tuning or even complete customization of the bike after purchase.

Opinions on how to set up a bike and where to start differ, many say that you must first set up the front derailleur, and then the rear, others vice versa. The essence of this does not change, but it is really recommended to first adjust the rear derailleur in order to more correctly configure the front.

Bicycle Rear Derailleur Setting

First, we’ll look at the design of the switch itself:

On more modern switches there is also a switch tension adjustment screw, but we will not consider it, since it is generally not needed in setting.

Switching the rear derailleur to the smallest star

Unscrew the rear derailleur cable clamp screw and loosen the cable

Install the chain on the front derailleur to the middle sprocket (click the left coin on the steering wheel)

We spin the pedals on the fly, if the flail falls off the stars, then it is necessary to tighten the screw marked “H” by 1-2 turns, if after that the chain is in place, but at the same time it tries to switch independently to the next gear. we unscrew this screw by 0.5.1 turn

The essence of this method is that when the rear derailleur cable is unscrewed, use the screw “H” to make the rear derailleur and the smallest sprocket in front are absolutely on the same mowing line, this is easy to check, just look at the rear of the transmission from the side of the stars.

If everything is ok, then move on. we pull the cable by hand and tighten the bolt to fix the tension

We try. to click the rear derailleur shift knob by 1 speed up, if the switching was correct, we click further to the largest sprocket, if not, then pull the cable with an “adjusting drum”. We unscrew the drum by 1 turn, try if ok, continue to click further, if it does not switch another 1 turn.

So, we got to the largest star in the back, but when switching, 2 situations can arise:

a) the chain falls off behind a large sprocket. then it is necessary to tighten the adjusting screw “L” by 1-2 turns

b) it is impossible to switch to the largest star at the back, the shift knob does not click or the switch itself simply does not switch. then the bolt marked “L” should be unscrewed 1-2 turns.

That’s all we have set up the rear derailleur of the bike. All adjustments with bolts “H” and “L” are made slowly, you should unscrew / tighten no more than 1 turn at a time, maybe even 0.5 turn, in order to set the switch as correctly and quickly as possible. Let’s move on.

When adjusting the front derailleur, there are nuances that depend on the derailleur itself (foot width) and transmission (6/7/8 or more speeds). We take a look at the most popular Shimano Tourney FD-TX50 and Shimano Acera FD-M360 derailleurs.

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Switching to the smallest star in the front and the largest star in the back.

Unscrew the front derailleur cable

We adjust the switch frame with the screw “L” so that when installing the switch, the inner part of its frame (the one that is closer to the bike, when viewed from above) does not touch the chain. tighten if the distance to the chain is more than 3 mm or unscrew if less.

After that, we pull the front derailleur cable, but not tightly, so that when you tighten the cable tension screw so that the cable is slightly relaxed (dangling in a horizontal plane by about 1-1.5 cm)

We switch to the middle star and start checking. we install the second star behind, that is, not the smallest one, but the next one. We check. if the chain touches the outer frame of the switch, then we stretch the cable, on the shift knob we have the same plastic bolt as on the rear derailleur, unscrew it 1-2 turns, so that the distance of the chain from the outer frame of the switch is 3-4 mm.

Moving on to setting the largest sprocket. switch the rear derailleur to the smallest sprocket and watch. If it switched without problems, then we do not turn anything, if it did not switch, that is, there was a click, but the switch did not switch, then we unscrew the screw “H” by 1-2 turns, if it switched and the chain slept, then we tighten this screw by 1-2 turns We check further. the distance to the outer frame should be no more than 3 mm when turning on the smallest star from behind. If everything is ok, then you did everything perfectly.

The bike derailleur setup is complete and you can now sit down with pride and enjoy riding your iron horse. There are tons of setup videos, the best of all is at this link: https://www.YouTube.com/watch?v=Km9B5d_1tg0

Ride with pleasure!

Shimano Deore LX / SLX

There is a double division here. Since 2009, Deore LX has been positioned as a travel equipment group. And the SLX is already aiming for racing.

Deore LX. here Accent is made for reliability and durability at the expense of weight. The most ideal option for tourists, the price is too high, but the reliability is high.

SLX. here Accent is made for racing. Less weight, better spring stiffness, consistent accuracy and speed.

These switches can no longer be classified as budget switches. They are clearly not needed for simple pokatushek. Those who understand what they are paying for, but are not ready (or cannot) spend money on top-end Shimano derailleurs should take a closer look at them. Depending on whether you are a cyclist or a racer, you need to choose the appropriate line.

In the road range corresponds to the Shimano 105 group.

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.

How to set up SHIMANO shifters?

Adjusting bike speeds is a delicate matter, and you can have your iron horse sent to a special service. But it’s better to learn how to do it yourself, especially since this skill is extremely useful, and there is nothing complicated in it. How do I set up a Shimano derailleur on my bike? Shimano Deore shifting is used as an example for the following instruction, as it is the most popular.

How to install a rear derailleur on a bike?

Having clocked many kilometers on a bicycle, I was convinced that a branded derailleur is much more important for a comfortable ride than stylish grips or leather Brooks. But it’s not enough just to buy Shimano or Sram, the quality of installation and setup is important.

Preparatory process

As mentioned above, a thorough cleaning precedes a competent setting. Sometimes even such a procedure can have a beneficial effect on the performance of mechanisms. Technological aspects of the preparatory work are as follows:

  • Clean derailleur and sprocket cassette.
  • Clean old grease from tensioner rollers.
  • Wash and lubricate the chain.

Next, you need to release the hummock, for which the tension screws at the shifter and on the rear spreader are screwed in until they stop. The cable should be pulled out of the clamping screw, but it is not necessary to remove it. It will not hurt to inspect it in order to find damage and, if necessary, treat it with lubricant.

Shimano Mountain Bike Rear Derailleur Adjustment Screws: Technical Minimum

Despite the variety of parallelogram-type spreaders from the Japanese manufacturer, their design and principle of operation are similar. In the process of adjusting the device, five elements are involved:

  • 1. fastening the cable in the form of an embedded bolt with a nut.
  • 2. screw for tensioning the cable with a drum.
  • 3. a screw for adjusting the chain tension.
  • L. limit screw for adjusting low gears.
  • H. limit screw for correcting high gears.
derailleur, shimano, bike

Special screws L and H, which are used to adjust the rear derailleur of a bike with Shimano Alivio, physically restrict the movement of the mechanism, which prevents the chain from jumping off. In practice, they are used mainly only when debugging a new transfer device, subsequently the procedure is not needed.

In the event that the cock or the mechanism itself is bent, adjusting the stop screws can solve the problem for a short time. Their sensitivity is not very high, so 1-2 turns at a time are quite justified.

What to do if you can’t adjust the bike’s rear derailleur

There are several methods for solving this issue. But if the standard tuning instruction did not work, to tune the rear derailleur you need to:

  • dismantle the chain, remove the cable;
  • move the switch to the chain position to the smallest star;
  • use adjusting bolts (this way you can tighten the cable);
  • set the adjusting bolt H to the extreme position;
  • move the part called the parallelogram to the big star and adjust the position of the bolt L.

The regulator is fixed with bolts. It must be set to the extreme position. After that, the chain must be displaced in this order: the front cassette is the largest star in diameter, the rear one, on the contrary, is the smallest.