How to shift gears on a 21 speed bike

Cycling Literacy: How to Change Gears on a 21-Gear Stealth Bike

A typical city bike has one sprocket at the front and one at the back. One gear is not enough to comfortably navigate any terrain and maintain the correct cadence. These disadvantages are eliminated by the multi-speed transmission, which is equipped with modern mountain and road specimens. Correctly selected gear ratio allows you to pass swampy, sandy and other areas of increased complexity, which are beyond the power of a single-speed “bike”.

Practice

If the device is unpacked and assembled, the method for adjusting the brakes has been completed, the algorithm on how to switch speeds on a Stealth bike is clear. you can ride. When moving, it is worth choosing the gear ratio correctly, excluding chain distortions:

  • Big star. Used when driving downhill and no wind. Cooperates with rear set 5, 6, 7.
  • Medium asterisk. It is used when starting, moving along a flat road and a well-groomed intersection. Interacts with the rear block 3,4,5.
  • Small star. It is used when skiing on slopes, rough rough terrain, wetlands, viscous mud, sand, thick grass. Spins optimally with rear sprockets 1 to 3.

Building a skill: how to shift gears correctly using the example of a 21-gear Stealth bike

  • Optimum crank speed ensures joint integrity.
  • Acceptable cadence is the key to effective muscle work.
  • Exemplary speed preserves plant life of components.

You can learn and learn how to shift gears correctly on a mountain bike only after mastering its high-speed design. So, on any Stels Navigator model the following are installed:

  • 3 stars on the front and 7 stars on the back.
  • Handlebar shifters.
  • Rear and front derailleurs, which are regular metal frames attached to the frame.
  • 2 cables linking the steering gears and frame spreaders.

The process of regulating the position of the chain between the stars with the help of frames is called switching. It is carried out by working with shifters. The latter are of two types: trigger (with levers) and pin (rotate). They are installed on the steering wheel in two copies:

  • The left one is responsible for the operation of the front transmission.
  • The right one moves the rear chain spreader.

On the shifters, there are numbers showing the number of the current star. The stars are numbered from left to right. The shifting process itself consists in pressing or rotating the levers. When pressed (trigger shifters):

  • Upper Left Stick. Resets to smaller chainring in 3-1 sequence.
  • Lower Left Arm. Folds over to the large front sprocket (1-3).
  • Upper Right Handle. Throws to parts with fewer teeth located at the back (1-7).
  • Lower right lever. moves the rear frame towards the large stars (7-1).

We consolidate knowledge or how to change gears correctly on any mountain bike without harm to humans and equipment

Awareness of the gearshift mechanism is not enough to operate a bike confidently and safely. It is also worth familiarizing yourself with the tips on this matter:

How to Shift Gears on a Bike | 3 speeds, 7 speeds, 21 speed bikes

  • The chain can only be thrown while moving. If the position of the frames was changed on a stationary bike, you need to spin the pedals at idle (raise the rear wheel).
  • Use the transmission only with an unloaded chain. In other words, move the links of the chain drive only when the connecting rods rotate quickly, but not at the start or under load. This is fraught with the fact that the actuators can break and the chain break. And indeed, with a lot of effort on the pedals, there is a great risk of not switching at all when the corresponding command is given.
  • Do not transfer to several stars at once. Changing the position of the frames is only one click. In this case, the clarity of the transmission is ensured.

For your information. The chain must be washed with, say, a high pressure washer and lubricated. If it slips on the cassette, it must be changed along with the rear sprockets.

Another important aspect is to select the transmission speed so that pedaling is easy. The optimal cadence verified by cyclists is 80-90 rpm. To measure it, you can use bike computers, for example, CatEye Strada Cadence. Be sure to drink during pokatushek. These two rules will save your knee joints.

How to properly switch gears on a bike?

Bicycles designed for sports or walking are equipped with a multi-speed transmission, so the biker has the ability to change gears depending on the situation on the track. Manufacturers produce 18,21,24, 27-speed bicycles. However, from most beginners you can often hear that in so many gears on a bike they are intimidated, they get lost and do not imagine how they can confidently cope with so many speeds.

Let’s first figure out why you need gears on a bicycle, as well as how many of them there can be.

It’s simple enough. the gears on the bike are needed to keep your knees healthy and comfortable to ride. With their help, you should set your optimal cadence, that is, the cadence per unit of time and the pressure on the pedals. This will allow you to optimally spend energy, save your bike and health. Your cycling will be extremely productive in any terrain.

The optimal number of revolutions per minute is individual for the biker and depends on many factors. his physiology, age, experience, driving style and terrain. On average, beginners are recommended to cadence 80-100 (110) rpm.

Now let’s figure out why we need gears on a bicycle in such an amount, because this is not a motorcycle or a car.?

In reality, experienced bikers ask you not to be intimidated by multi-speed cycling equipment, because as soon as you learn how to pedal correctly, then not everything will be involved in your work, for example, 27 speeds, but almost two less.

So how do you know how many bike speeds you have? It depends on the number of stars, on average, manufacturers like to produce 21-24 speeds, that is, when there are 3 gears on the front wheel and 7-8 gears in the rear.

A simplified algorithm for calculating how many gears your bike has next. 37 (8) = 21 (24)

Well life hack: how to shift gears correctly on a mountain bike with 21 speeds

A typical city bike has one sprocket at the front and one at the back. One gear is not enough to comfortably navigate any terrain and maintain the correct cadence. These disadvantages are eliminated by the multi-speed transmission, which is equipped with modern mountain and road specimens. Correctly selected gear ratio allows you to pass swampy, sandy and other areas of increased complexity, which are beyond the power of a single-speed “bike”.

READ  How To Adjust The Brakes On A Stealth Bike

In short

  • The main purpose of the transmission is to provide an easy pedal travel (80-90 rpm) in any driving situation.
  • Switching is carried out by pressing or rotating (trigger or pin shifters, respectively).
  • The selected gear is displayed on the steering wheel shift control.
  • When traveling around the city on a 21-speed bike, it is optimal to use the middle chainring and one of the three rear sprockets: 3, 4, 5.

basic rules for gear shifting on a 21-speed bike

In our childhood, everything was simple. we did not hear about any gears, we drove at the same speed. Over time, things get more complicated, and now we have models of bicycles on which the number of gears can reach thirty! How to deal with the management of this entire complex system?

How to use the switch correctly?

To avoid increased wear on the cassette on the rear wheel, chainrings on the front wheel, chain breakage and not damage the gearshift system of your bike as a whole, you need to know a few basic rules for shifting gears. So:

When changing speeds on a bicycle, you should not allow maximum chain skew, for example, such a position as in front of 1.back 8, and vice versa is unacceptable.

Please note that the stars are numbered from the frame!

Using the example of a 24 (38) high-speed transmission, we will show how to combine gears:

AheadBehind
1 (small) 1-4
2 (medium) 3-7
3 (large) 6-8

The lightest gear is when the stars are in the 1-1 position. In the process of riding, you should strive for a larger number, increase power and speed, but do not resort to the maximum increase in movement often, as this is an additional load on both the transmission mechanism and the joints of the legs.

The main guideline is that pedaling should not be difficult for you, but also not very easy, the effort should be comfortable.

Experienced bikers advise: the difference between the speeds should not be more than 4!

When you decide to change gears, especially for chainrings, you should definitely reduce your effort a little and not push hard on the pedals. Why? The fact is that the front group of stars works with the upper part of the chain, which at the moment of movement experiences maximum tension, therefore it can break if you change the position of the speeds without stopping to pedal with effort.

Switch should only be done when you are on the move.!

Need to switch multiple speeds at once? Do it in stages, don’t skip.

Also, when shifting, you need to squeeze the lever of the shifter as much as possible, which is responsible for the front group of stars.

How do you know if you did everything right? A great way to find out if you’ve learned how to shift gears right. listen to it, if the chain has laid down correctly, then you will not hear any extraneous sounds in the form of clanging or cracking. of course, provided that you have the chain in proper condition, it is lubricated, not old, and so on. The only thing that a cyclist can catch. so it’s a little click.

How to catch and feel the moment when you need to change gears on your bike? An important condition for this. learn to focus on your own feelings, if you don’t have enough strength and you started to pedal idle, then it’s time to switch to the next speed.

So, when the answer to the question of how to change gears on a bicycle has become clear, you need to get as much of your own experience as possible in order to begin to feel the moment when and how you need to change gear. To do this, ride in different conditions, for example, on the highway, go up and down the mountain, feel how the revolutions of each wheel change with changing speeds on the bike. Exclusively in this way, you will run over your experience with the bike transmission, learn how to pedal with the optimal cadence for you.

Practice

If the device is unpacked and assembled, the method for adjusting the brakes has been completed, the algorithm on how to switch speeds on a Stealth bike is clear. you can ride. When moving, it is worth choosing the gear ratio correctly, excluding chain distortions:

  • Big star. Used when driving downhill and no wind. Cooperates with rear set 5, 6, 7.
  • Medium asterisk. It is used when starting, moving along a flat road and a well-groomed intersection. Interacts with the rear block 3,4,5.
  • Small star. It is used when skiing on slopes, rough rough terrain, wetlands, viscous mud, sand, thick grass. Spins optimally with rear sprockets 1 to 3.

How to change gears. rules

A universal rule: with a small star of the system, it is undesirable to use 2 extreme small cassette stars, and with a large one. 2 extreme large.

By gaining experience, you will intuitively feel at what moment to change gears and which gear to choose. Correct switching requires a careful and thoughtful attitude at first, and the rest is achieved with practice. We wish you good luck on the road!

Automatic switching

Of course, manufacturers do not live quietly in a stable market, and they are looking for new uses for their engineers’ talents. So, for a long time, the top companies Shimano and SRAM have been producing small batches of automatic gearboxes, where, using electronic sensors (Shimano Nexis, Auto, etc.), they switch speeds in the planetary hub.

There are also rare models with automatic gear shifting on a mechanical basis. the rotational speed is determined by the centrifugal force of the load, which is why the mechanism changes the gear ratio.

Mechanics

First and foremost, the correct shifting depends on the bike device. Previously, there were no problems with shifting, as there were no speeds on most bicycles. All obstacles were overcome with the power of the rider or on foot. To understand how to change speeds, you should study the design of the switching system itself.

Other principles

When it comes to gear shifting, these are almost always standard derailleurs, but there are other models, for example, planetary hub and “hello” from the automotive world. automatic transmissions.

Planetary hub

Urban bikes and designer choppers usually do not have a front derailleur, but there is a rare thing in the bicycle world. a planetary hub, when the gear and shift system is packed into a single closed mechanism that is installed inside the wheel. This principle is applied on cars, but does not find much recognition among cyclists, absorbs too much energy (up to 10%).

On the other hand, the planetary hub does not have any mechanical factors limiting shifting. you can change gears both under load and at the “inappropriate” moment. The mechanism will work properly.

shift, gears, speed, bike

Switching mechanics

Correct switching does not require much knowledge. Almost all bike models are equipped with a cable that brings the force from the shifter. the derailleur control element. to the derailleur.

When the cable is pulled, the derailleur frame moves and transfers the chain to the chainring of a larger diameter; when released, it falls off or moves to smaller stars. These actions are performed without auxiliary mechanisms, using the flexibility of the chain and friction with the switch frame, i.e. the chain and all elements are under stress; transmissions are not provided for in normal operation. Because of this, there is a recommendation not to switch gears under load or without movement.

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Training and preparation

It is recommended to use low gears to prepare for driving at the start of the day or season. For the first 10-20 minutes of a long ride, the legs need a “warm-up”, for which the ideal cadence of 60 rpm (movements per minute) and the minimum load. ie. speeds with 1 and 2 chainrings.

shift, gears, speed, bike

A similar recommendation in a more global sense. the first hundred kilometers of the season, especially on a mountain bike, should be overcome in low gears so that the legs “remember” skills and are not damaged by too serious changes in daytime load.

How to properly shift gears on a bike

In fact, changing speeds on a bike is a trained art that depends on the rider’s physical condition, long-term training, and the design of a particular bike. Consider various factors in this article.

Speeds and stars

The first derailleur bikes were models such as the Tourist, the massive heirs to 70s sports bikes. They did not have a front derailleur, but the cassette allowed you to select one of four speeds.

Over time, the number of available speeds grew, and now bicycles with 18, 21, 24 and 27 values ​​are becoming the de facto standard. Usually this is a combination of 3 stars on the front derailleur and 6-9 on the rear, in a combination of 3 and 7 stars, 21 speeds are obtained. Some high-speed models have already acquired 10 stars on the rear derailleur, but so far this is a rarity.

Actually, “speed” is a star, and the total gear ratio is obtained from a combination of the current stars selected by the front and rear derailleurs.

How to properly switch gears on a bike?

Bicycles designed for sports or walking are equipped with a multi-speed transmission, so the biker has the ability to change gears depending on the situation on the track. Manufacturers produce 18,21,24, 27-speed bicycles. However, from most beginners you can often hear that in so many gears on a bike they are intimidated, they get lost and do not imagine how they can confidently cope with so many speeds.

Let’s first figure out why you need gears on a bicycle, as well as how many of them there can be.

It’s simple enough. the gears on the bike are needed to keep your knees healthy and comfortable to ride. With their help, you should set your optimal cadence, that is, the cadence per unit of time and the pressure on the pedals. This will allow you to optimally spend energy, save your bike and health. Your cycling will be extremely productive in any terrain.

The optimal number of revolutions per minute is individual for the biker and depends on many factors. his physiology, age, experience, driving style and terrain. On average, beginners are recommended to cadence 80-100 (110) rpm.

Now let’s figure out why we need gears on a bicycle in such an amount, because this is not a motorcycle or a car.?

In reality, experienced bikers ask you not to be intimidated by multi-speed cycling equipment, because as soon as you learn how to pedal correctly, then not everything will be involved in your work, for example, 27 speeds, but almost two less.

So how do you know how many bike speeds you have? It depends on the number of stars, on average, manufacturers like to produce 21-24 speeds, that is, when there are 3 gears on the front wheel and 7-8 gears in the rear.

How is the mechanism for gear shifting?

On a modern mountain bike, there is usually a system of 3 stars of different sizes in front, a group of stars, the so-called cassette, is also provided at the back, but there are more stars, from 6 to 10.

The system in front consists of:

  • A small star, which is responsible for climbing uphill at low speed, but gives a lot of thrust;
  • An average star, also called a marching or walking star. As a rule, the largest part of a cyclist’s path passes through it;
  • Large sprocket designed for driving on asphalt, flat surface. Wherever serious effort is not needed, it allows you to drive with great power at high speeds.

The set of stars placed at the back has the same logic, only the size goes the other way around, from the largest, which is closer to the frame, to the smallest outer.

Gear shifting is assisted by mechanisms on the handlebars called shifters or shifters. Most of the shifters have a trigger shift mechanism, some hybrid bikes are equipped with shifters like a rotation handle, but more advanced ones have a shifter combined with a brake lever.

Trigger shifters are controlled using levers, and grip-shift is a turning method, this is in more advanced bikes. There are two levers for each shifter, for downshifts and upshifts. The trigger mechanism is as follows. the voltage from the shifters is transmitted through a cable to the switches that are installed on the wheels. The rear group of stars changes the position of the chain on the stars using the rear derailleur, for the front system there is a derailleur at the front.

The shifters can have dials that show which gear you are currently in. In some models, the dials are replaced by a mini-display. Novice cyclists often look at shifters, and experienced cyclists, by the way the pedals move, feel in which gear they are currently riding.

Please note that if you have two switches on your wheels, front and rear, then there are also two shifters on the steering wheel. If you have 3 stars in the front system, and 8 stars on the rear, then on the shifter, which is responsible for shifting gears in the front, there will be three divisions, for the rear mechanism, respectively, 8 divisions!

How to shift a 7/21 speed bicycle

How to use the switch correctly?

To avoid increased wear on the cassette on the rear wheel, chainrings on the front wheel, chain breakage and not damage the gearshift system of your bike as a whole, you need to know a few basic rules for shifting gears. So:

When changing speeds on a bicycle, you should not allow maximum chain skew, for example, such a position as in front of 1.back 8, and vice versa is unacceptable.

Please note that the stars are numbered from the frame!

Using the example of a 24 (38) high-speed transmission, we will show how to combine gears:

The lightest gear is when the stars are in the 1-1 position. In the process of riding, you should strive for a larger number, increase power and speed, but do not resort to the maximum increase in movement often, as this is an additional load on both the transmission mechanism and the joints of the legs.

The main guideline is that pedaling should not be difficult for you, but also not very easy, the effort should be comfortable.

Experienced bikers advise: the difference between the speeds should not be more than 4!

When you decide to change gears, especially for chainrings, you should definitely reduce your effort a little and not push hard on the pedals. Why? The fact is that the front group of stars works with the upper part of the chain, which at the moment of movement experiences maximum tension, therefore it can break if you change the position of the speeds without stopping to pedal with effort.

Switch should only be done when you are on the move.!

Need to switch multiple speeds at once? Do it in stages, don’t skip.

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Also, when shifting, you need to squeeze the lever of the shifter as much as possible, which is responsible for the front group of stars.

How do you know if you did everything right? A great way to find out if you’ve learned how to shift gears right. listen to it, if the chain has laid down correctly, then you will not hear any extraneous sounds in the form of clanging or cracking. of course, provided that you have the chain in proper condition, it is lubricated, not old, and so on. The only thing that a cyclist can catch. so it’s a little click.

How to catch and feel the moment when you need to change gears on your bike? An important condition for this. learn to focus on your own feelings, if you don’t have enough strength and you started to pedal idle, then it’s time to switch to the next speed.

So, when the answer to the question of how to change gears on a bicycle has become clear, you need to get as much of your own experience as possible in order to begin to feel the moment when and how you need to change gear. To do this, ride in different conditions, for example, on the highway, go up and down the mountain, feel how the revolutions of each wheel change with changing speeds on the bike. Exclusively in this way, you will run over your experience with the bike transmission, learn how to pedal with the optimal cadence for you.

How You Should Be Changing Gears on Your Bike/Bicycle

How to change speeds on a bike

The article about shifting gears on a bicycle is useful for those who have just bought a two-wheeled partner and need advice on this issue. Learning how to switch speeds on a bike is absolutely not difficult. it’s all about practice. Just two words about the role of the gear. Their need is fully felt under different circumstances: the specifics of the landscape relief of the area, weather conditions, the physical strength and endurance of the cyclist, as well as when setting the desired speed. They allow you to set a comfortable driving rhythm. Bicycles equipped with a specific set of gears are able to cover the distance with less stress than simple single-speed bicycles.

The main role in the gears is assigned to the speed switches. shifters. In mountain bikes, they are located on the handlebars, and in road bikes they are combined with brake levers, which are switched with movements of the hand to the left and to the right. Mountain bike shifters can be rotary or lever type. The left shifters are responsible for shifting the front (large) stars, the right shifters are responsible for the rear.

Correct gear shifting:

There are a number of factors to consider in order to use speeds properly:

  • the main rule is to change gears directly while driving, this will save you from unwanted damage to the switches;
  • Shift gears early, if possible, and not when the bike loses speed or there is a difficult area ahead. The chain under load can make it impossible to switch, or even break with a strong pressure;
  • do not increase the gear in the process of taking lifts, do it before lifting;
  • try to avoid distortions of the chain, in those moments when the chain is located on a large front sprocket and a large rear sprocket, and if vice versa;
  • do not switch to several gears at the same time, wait for one to work clearly, and only then switch to another.

These recommendations, combined with regular cleaning and checking of parts, adjusting and checking the condition of the cables, will allow you to make riding a pleasure.

What is gear shifting

The essence of switching speeds is to drag the chain from one star to another. Various combinations of front and rear sprockets allow you to regulate the cyclist’s load. But first, let’s turn to the bike drivetrain.

The transmission is all the parts and assemblies of the bicycle that provide the transfer of energy to the rotational movement of the rear wheel. The transmission consists of a carriage, a system of connecting rods, a chain, sprockets or cassette (or ratchet), front and rear derailleurs, as well as shifters (they are also sometimes called shifters).

Gear shifting occurs through the shifters located on the steering wheel. Using the rear derailleur shifter, located on the right handlebar, the chain is thrown between the rear sprockets, and using the front derailleur shifter (it is on the left on the steering wheel) between the front sprockets.

Most multi-speed bikes have three drive sprockets and six to eight driven sprockets. The fore stars are counted from small to large, and the rear stars, on the contrary, from large to small.

Types of speed switches

There are two main types of speed derailleurs. external and internal shifting.

What is gear shifting for?

Riding on a flat road, uphill or downhill requires different efforts from the cyclist. On a single speed bike, there are no options, since there is only one gear. And those who have experience riding a single speed bike know how difficult it is. But in the case of a multi-speed bike, new possibilities appear. you can adjust the load. On a bike equipped with multiple gears, for example, it is much easier to ride uphill. Let’s figure out how the gearshift occurs.

External switching mechanism

This type of derailleur is used on most multi-speed bikes, from city bikes (eg Forward Dortmund 28 2.0) to mountain bikes (eg Forward Apache 27.5 2.0 disc). Gear shifting is carried out using the front and rear derailleurs.

Front derailleur The front derailleur transfers the chain between the chainrings. The derailleur design has a moving frame within which the bicycle chain runs. When shifting gears with a shifter, the frame moves and becomes above the desired star, which ensures the movement of the chain to this star.

Rear derailleur The rear derailleur is a spring-return mechanism that moves a frame (or foot) with rollers between them within a transverse axis. In one direction, the switch is moved with a cable, and in the opposite direction, with a return spring. When the derailleur is moved, the chain passed through it is thrown from one rear sprocket to another, and the chain tensioner automatically removes the chain slack.

Advantages of external switches: simple design low weight low price high number of gears

Disadvantages of external derailleurs:. highly susceptible to unfavorable external factors. need for adjustment and maintenance. risk of breakage when the bike falls. it is impossible to change gears if the bike is stationary

Internal switching mechanism

City bikes often use an internal gearshift mechanism that is hidden inside the rear planetary hub. Planetary hub bikes have only one chainring and one sprocket. The number of speeds / gears of the planetary bushings is usually from 3 to 7. The planetary hub has a rather complex internal structure.

Pluses of planetary bushings: they withstand adverse weather and road conditions well, since the mechanism and all its parts are enclosed in a case and, as a result, are reliable and durable; you can switch speeds without pedaling.

Cons of planetary bushings:. heavy weight;. very difficult repairs, impossible in field conditions.