Setting the low gear limiter
We adjust the adjusting screw for low gears, marked L. In the front, we install the chain on a small star, in the back. on a large one. We tighten the screw L so that when the wheel rotates, the chain slightly clings to the far lower frame of the switch. As soon as you feel the chain rubbing against the frame, loosen the screw a quarter turn.
Dust, dirt and water get inside the shirts while using the bike. To extend the life of your shirts, use an internal dust cap. Nuance: do not use brake shirts to change gears.
How to check: Disconnect the derailleur cable and move it manually. If the shirts are clogged, the cable will be tight.
How to fix it at home: disassemble the system, remove the caps from the shirts and treat the inside with a spray like VD-40 or Teflon. The second stage. use a syringe to fill the shirts with any machine oil.
Beachbikes.com. How to tune a 7 speed bicycle (adjusting a derailleur)
Half of the cassette does not work
Partial blocking of the cassette occurs due to excessive tension in the cable.
How to check: Check the position of the shirts. Perhaps one of them flew out of the mounting hole.
How to fix it at home: correct the position of the shirt and check the tension level of the cable.
If the chain slips at a certain speed, the source of the problem is wear or deformation of the sprocket.
How to check: Look closely at the chainrings and chainrings. Possibly bent or broken tooth, star bent.
How to fix it at home: partial or complete replacement of cassette parts will help.
If the chain slips at a constant frequency, the problem is most likely in the chain itself.
How to check: Rotate the wheel and observe how the chain runs over the rollers of the rear derailleur. You will be able to figure out the links that do not bend. This effect can be observed after replacing the chain, if one of the links is pinched, or the chain links are bent after a fall.
How to fix it at home: if the link is bent with a screw, you need to remove it and shorten the chain. If the link is bent in the same plane, you can try to correct the section of the chain with this link manually.
Why speeds can switch poorly
When the cable is pulled by the lever, the switch switches from a smaller chainring to a larger one, when released, it returns to its original position under the action of a spring. It is best to align the derailleur roller with the teeth of the first sprocket before starting the adjustment. Thus, each subsequent speed is automatically adjusted.
Screw in the thumbs on the rear derailleur and shifter until they stop, then release them half a turn. Unscrew the fixing screw and release the cable. Move the chain with the shifter to the small sprocket, tighten all the cable adjustments. Then fasten the cable and check the gear shifting by rotating the pedals.
If, when going to high speed, the chain jumps poorly, then the cable will be overtightened. It must be loosened by screwing the lamb on the shifter more tightly. If, after loosening the cable, the speeds switch poorly, loosen the screw H.
If the shift does not switch to a large chainring, the thumbscrew on the shifter must be loosened, thereby pulling the cable. If the speeds are still poorly shifted, slightly loosen the screw L.
Setting up the rear derailleur begins with adjusting the stop screws. To adjust the extreme position of the switch, set the chain at the back to a small one, and at the front to a large star.
The L (Low) screw corresponds to a large star, the H (High) screw corresponds to a small one. With these screws we limit the extreme position of the rear derailleur so that the chain does not get stuck between the small sprocket and the frame, as well as between the spokes and the large sprocket.
Screw H must be tightened so that the upper roller of the rear derailleur is exactly under the small star. When we screw it, the switch moves to the spokes, when we release it, it moves out.
We tighten the cable and clamp it with a screw. If the speeds do not shift well to the small star, slightly loosen the adjusting screw H.
We transfer the chain to the last sprocket to adjust the screw L. In a tightly tightened position, the screw prevents the chain from dropping to the spokes. Try pedaling by pressing the switch with your hand. If the chain falls off, tighten the screw tighter.
Setting the high gear limiter
At the rear, we rearrange the chain approximately to the middle of the cassette, at the front, with the help of the shifter, we switch to the middle sprocket. If the chain is reluctant to move to the top sprockets, tighten the cable by slightly loosening the screw on the front derailleur. After adjusting the chain on the middle sprocket, switch the front to the large one, and the rear to the small one. This is the second extreme position, which corresponds to the high gear screw H. In this position, we adjust the screw so that it limits the travel of the front derailleur frame and the chain does not fly off the connecting rod. Be careful not to catch the chain on the outer front frame when pedaling
BIKE SPEED SELECTOR, WHAT TYPES ARE
Bicycle gearshift is a transmission component that directly serves to shift gears. Gear shifting for a bicycle is a very important and sometimes very necessary function for a bicycle, which allows you to effectively distribute the energy expended on the effort aimed at pressing the pedals and the frequency of their rotation.
The gear ratio between wheel and pedals that changes and allows this distribution to occur.
There are several types of switches:
- external switching mechanism;
- internal switching mechanism;
- combined mechanism.
Its design allows you to transfer the chain from one to the other on the chainrings. It works like this: inside there is a moving frame through which the chain passes.
When you need to switch the speed, this frame moves (it becomes above the desired star) and, accordingly, moves to the chain star.
There are several parameters in which the front derailleurs differ:
- There are several ways to attach them to the frame. The first method is to use cable ties to attach the switch. You can also use the second method (especially for frames with non-standard geometry). clamp the plate that holds the switch with a cartridge or carriage.
- Also, there may be different angles of installation of the switch relative to the frame (you should select this parameter correctly and accurately so that you can correctly shift gears).
- Another parameter that may differ is how the cable is attached. It can be connected to the switch from above or below (there are models that have both connection methods in their design).
For all front derailleurs, it is not possible to swing the chain under load. Of course, almost all manufacturers are trying to find a solution, but emerging systems are expensive and often ineffective.
HOW TO SET THE REAR SWITCH
First you need to make sure it is not bent (the chain tensioner is parallel to the cassette stars). Now let’s start adjusting.
At high speed, the chain should be on the small star of the cassette. We put everything in this position. To adjust, we need to find two screws (in the figure they are indicated by H and L).
Screw H must be tightened so that the derailleur roller is aligned with the line with the small star. In the same way, screw L should be tightened. the roller should align with the large sprocket.
After that, we pull the cable (the maximum speed is on the shifter). It should fit exactly into the groove near the fixing bolt (number one in the picture). Now it should be tightened.
We fasten the cable with a stretch. Check if high gears engage well. If not, loosen the cable with the adjuster (marked with number two). Also check if the speeds are reset well (if it is bad, then tighten the cable while unscrewing the tension adjuster).
The final step in adjusting the rear derailleur will be to set the smoothness when shifting gears. To do this, you need to put the chain on a small star in the front and a large one in the back.
The tension screw (marked with number three) should be tightened so that the top roller on the rear derailleur is as close as possible to the star, but does not touch it.
Now put the chain the other way around (in the front on a large sprocket, and at the back on a small one). the roller should not touch the cassette sprocket either.
How to adjust Shimano Tourney Derailleur
HOW TO SET UP THE BIKE SPEED SHIFT
Over time, every cyclist has trouble shifting gears. Either you cannot switch from one gear to another. you jump over a couple of stars, or you cannot switch at all. This is where the need for awareness arises on how to set up gear shifting on a bicycle.
Adjusting the speeds on a bike is not a complicated procedure (although at first glance it seems so). If you are configuring two switches, start from the rear.
How to Adjust the Rear Derailleur for Crisp Shifting
INTERNAL SWITCHING MECHANISM
This type of derailleur uses planetary bushings. In this case, the shifting mechanism is hidden inside the rear hub, which results in one sprocket on the front wheel, a chain, and one sprocket on the rear wheel.
The current planetary hubs have a different number of gears (from three to fourteen), they can also have a built-in brake.
Such mechanisms are mainly used on walking and road bicycles, very rarely on mountain bicycles.
Consider the merits of these switches:
- increased resistance to weather and road conditions (the parts of the mechanism are in the case);
- the presence of a built-in brake;
- they are quite reliable and durable;
- such a mechanism allows you to change gears without pedaling;
- fairly simple maintenance.
However, such mechanisms also have disadvantages:
- quite heavy weight;
- complication of movement may occur due to strong friction of the nodes;
- it is impossible to repair the mechanism in field conditions.
HOW IT IS CORRECT TO SWITCH SPEEDS ON A BIKE: A FEW PRACTICAL TIPS
Every cyclist should know how to properly switch speeds on a bike. Correct gear shifting will allow you to drive much faster and more comfortably with less effort and, moreover, it will increase the life of the sprockets and chain.
The first thing I would like to note is, always select the gear so that it is easy to pedal (cadence 80-110 rpm).
So, what you need to know to properly shift bike speeds?
Modern bicycles have a chain drive. This means that when the cyclist pedals, he transfers the force from the pedals to the cranks, and then to the system stars, which are located on the front wheel (leading), and then, accordingly, to the driven cassette stars. Ending effort on spinning the wheel.
If we consider switching speeds, then the essence is to drag the chain from one star to another. Of course, while choosing the correct star size.
Let’s take an example of the correct speed switching algorithm. We put the middle sprocket in front and start off. We select the gear with the rear derailleur, taking into account that there is no heavy load on the legs.
If the road goes uphill, then we throw the chain onto the large star in front. We carry out this principle of action with low gears, when we are going uphill, and there is not enough range of cassettes, with the middle front sprocket turned on, then we go to small.
Most importantly, remember that the middle chainring is the working chainring, only there will be no significant chain skew from it. If you take into account all of the above while cycling, then the transmission will last for a very long time.
COMBINED GEAR SHIFTING MECHANISM
Such mechanisms are hybrids of a conventional shift mechanism and a planetary hub.
Such mechanisms are in most cases installed on city bicycles. On other types of bicycles, they have not received their distribution, since they have all the disadvantages that internal and external switching mechanisms have.
Correct cycling gearshift setting
Modern bicycles equipped with a gear system allow you to move quickly and with minimal energy losses in any conditions: long climbs, rough terrain, roads with sharp turns that require constant changes in speed and gear ratio. This can also include driving against the wind, off-road, poor quality asphalt In general, the value of the transmission unit is simply colossal, especially on mountain bikes.
Despite the invaluable help, the transmission is great and requires frequent attention, care, and sometimes long and tedious fuss. One of the components that needs to be spent periodically is the shifting mechanism, which consists of front and rear derailleurs. At first glance, the arrangement of these parts seems complicated. In practice, setting up gear shifting is very simple.
How to properly adjust the rear and front derailleurs on a bicycle: photo and description of the process
Despite the fact that the bicycle was invented a long time ago and, it would seem, should have been out of date for a long time, but this two-wheeled vehicle is gaining more and more popularity every year. Cycling enthusiasts prefer this type of transport due to its convenience, ease of operation, environmental safety and practicality. Not only ordinary bicycles are very popular, but also mountain, track bikes, in which modern innovative technologies are involved. In order for the owners to enjoy cycling, they need to take care of it and monitor the condition of all parts and assemblies. If, in the process of cycling, you hear extraneous sounds, creaking, knocking and twitching during gear shifting, it’s time to pay attention to such a detail as the gear selector.
How to adjust the speed switch on a bike
Having become the happy owner of a bike, you should be prepared for the fact that over time you will have to carry out basic maintenance of the bike yourself. Of course, if we are talking about a serious malfunction, it is best to seek help from specialists, but many manipulations can be safely performed on your own.
Adjusting the front derailleur
- We put the speed switch in the following ratio: the smallest star in the front and the largest in the back;
- We unscrew the cable;
- Using the screw of the limiter for low gears, we adjust the position of the frame, it should be at a distance of no more than 3 millimeters from the chain;
- Stretch the front derailleur cable slightly;
- Switch the speed to the middle sprocket and check if the chain is touching the outer frame. If it touches, it is necessary to tighten the cable more;
- We put the derailleur on the smallest sprocket and check how easy it is to change gears. If the switch does not work, adjust the high gear limiter screw.
Correct installation of the front derailleur
You can start the front derailleur setting only after adjusting the rear derailleur. Installation is the initial step in adjusting the speed switch. It’s very important to do it right.
- before installing the switch, it is necessary to inspect the condition of the constituent parts and, if necessary, clean them from dirt and lubricate.
- The next step is to adjust the location of the front derailleur. On the frame, it should be located along the pipe under the saddle.
- Set the steering angle parallel to the drive sprocket on the front cassette of the transmission unit.
- Next, you need to adjust the gap between the underside of the derailleur frame and the upper mowing line of the teeth of the large gear. The gap should be minimal.
- Adjust the cable tension.
- Place the chain close to the inside of the frame.
It is also worth paying attention to setting up the chain. The bike chain is a very important element, with the help of which the impulse is transmitted from one chainring to another and the adjustment process takes place. The technical condition of the circuit is of great importance for the operation of the entire system. If, for some reason, the bicycle chain stretches or deforms, this cannot but adversely affect the operation of the entire transmission unit. To prevent this from happening, the chain must be periodically removed and cleaned, and then set the correct position. There are lock and lockless models of bicycle chains. They differ in the way they are connected. To remove the locking chain, it is enough to find the link with the lock and disconnect it with a screwdriver. The lockless bicycle chain is disconnected using a squeeze. This tool helps to push the link axle out and make the connector. If it skews for some reason, this can adversely affect the gearshift process.
One of the best manufacturers of bicycle parts, including derailleurs, is the Japanese company Shimano, which has a proven track record of producing products in which Japanese quality is combined with budget and price. Shimano derailleurs are suitable for all types of bicycles. Shimano derailleurs are installed on both regular touring bicycles and mountain and track bikes with gearboxes up to 33 speeds.
Another recognized market leader is Sram. The products of this company are used on bicycles of the city bike category, as well as on sports bicycles. Sram products are of good quality and affordable price for cycling enthusiasts.
Every bicycle owner who prefers this type of transport to others is obliged to understand how to switch its speeds. It is believed that the more speeds a bike has, the better it is. But in fact, speed only allows you to improve the quality of maneuvering and squeeze the maximum out of the bike’s capabilities, so then everything depends on the dynamic efforts of the person riding the bike. Conventional bicycles have a simpler design compared to high-speed ones. With such a bike there is less hassle, but it also has fewer possibilities. In the transmission unit of such bicycles there are only two stars: one large and one small. Multi-speed bikes, which have gained popularity in recent years, have two sets of sprockets in their transmission units: front and rear. Each cassette consists of stars of different sizes. To switch gears correctly, you need to remember a few basic rules:
- If your bike is not equipped with a planetary hub, you only need to change speeds on it while driving, otherwise there is a danger of damage to the bike.
- During gear shifting, it is not necessary to apply significant dynamic forces, in order to eliminate the danger of a burst of flowers, it is advisable to change gears sequentially, without making sharp jerks.
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 with the H mark. Use a screwdriver to adjust this screw so that the smallest star lies in the same plane with the rollers that 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 bike speeds
Adjust the bike speeds. one of the most frequent requests for bicycles on the Internet. For whom this task seems trifling, someone, even after lengthy explanations, turns out to be “too tough.” Of course, the easiest way is to give the bike to the workshop, where it will be done in a matter of minutes. But the most interesting! over, these skills will be needed in case of long trips, where, apart from the tool and your hands, no one else will help.
So, the cycling season is on the nose, we take out your favorites from the frozen balconies and closets and begin to “play tricks”.
Actually. everything is not so difficult, you will need a rear wheel stand (for easy adjustment of gear shifting) and a tool. standard set of 2-3 socket (letter L) hexagons, adjustable wrench, better set of wrenches for different nuts flat and Phillips screwdriver for adjusting screws.
We put the chain, front and rear, on the smallest sprockets. We clean the bike from dirt and impurities, wipe all surfaces from dust, remove clots of old grease, all rotating elements must be clean.
Working with adjusting screws. If the bike went to winter storage in good condition, do not touch the adjusting screws yet. The mechanics of all the famous bicycle manufacturers in the world recommend changing all the cables once a season. In our case, we will change the cables and shift shirts. To do this, unscrew the nut securing the shifter drive cable and remove the protective cap from the cable.
If there is an adjustment nut on the shifter and on the cable tensioner switch, screw it back in so that it can be used to tighten the cable. We remove the shirts from the cable, but do not throw them away. They come in handy for cutting new ones. We take out the cable from the shirt and, wiping it from dirt, take it out of the shifter and replace it with a new one. Next, we put in place new shirts (they should be with longitudinal weaving) with new tips. If the old shirts did not fit well in length, we lengthen or shorten them. Next, thread and tighten the front and rear derailleur cables. Trying to switch the chain to a large sprocket. Then we drop the chain back. If everything works out, then after checking the shifting of all rear gears, we can assume that the rear derailleur is set, and if not, we adjust the shifting by pulling or releasing the shifter cable with the adjustment nuts. You need to turn them very smoothly, literally a quarter of a turn. We look from behind at the position of the switch on the smallest and largest stars. The correct position of the selector wheels can be ensured by 1. a screw marked Lo or. we adjust the position of the rear derailleur so that the position of the largest gear corresponds to the same plane as the rollers of the derailleur. just twist or unscrew it, but very gradually and “from above” we control the position. When adjusting the position with the second screw labeled Hi or. the task is the same ensure that two stars are in the same plane (the smallest and the gear shift wheel in the switch). We do the same with the front derailleur. We start setting it up by checking the operation of the switch after replacing the cable and shirts with new ones. Tighten the cable when the derailleur is on the smallest chainring. Next, try switching to 2 and 3. Adjust the position of the switch by tensioning the cable with the adjustment nut located on the shifter. Sometimes you have to release and re-tighten the cable, fixing the nut on the switch.