How to redo bike speeds

DIY Electric Road Bike Gear Shifter

When riding a road bike, it is especially important to minimize changes in the required effort and pedaling speed, for this, depending on the terrain, it is necessary to frequently change the speed of the bike. On budget road bikes, of course, there is a budget shifting system, with it you will once again think about whether to change the speed or not. Under the cut is how I fixed it.

How You Should Be Changing Gears on Your Bike/Bicycle

bike, speeds

Servo and device case.

Background

My name is Vyacheslav. It was boring during the coronavirus crisis, so I started running. I ran 350 km in 3 months and ran the Moscow Half Marathon on 08/02/2020.

After running, I decided to try a road bike. I, who have not yet seen the contact pedals, have already looked after the slots for sprints for Ironman for 2021, it happens. I chose the most budgetary bike and equipment, so the scope for imagination and improvements is open.

Arduino Code

I picked up the parameters. moreover, some speeds for switching up and down required a different angle of rotation of the servo.

3D printed the case for the Arduino, servo and battery. Attached the body to the frame, connected the cable from the servo to the cable of the standard system (photo of the KDPV, see above).

The first tests showed the survivability of the system, so I decided to add features.

By adding a Hall sensor and a magnet on the leading star, I got a cadence sensor, now I can change gears automatically depending on the drop in cadence.

With the addition of a 3-axis gyroscope and an MPU6050 accelerometer, I had to tinker with the calibration. Knowing the angle of the bike, we can switch gears automatically uphill and downhill.

In general, automation is rather distracting, having two buttons with instant switching is always more convenient to change the speed yourself.

Electronic gear shifting

In my road bike, the gears are shifted in the middle of the handlebars, so you have to let go of the ram to constantly shift, it’s very inconvenient. In more expensive shifting systems on the ram itself, but there one system is more expensive than my entire bike.

My task was to make convenient and fast electrical switching in parallel with minimal modifications and preserving the existing switching option.

For the prototype, what was at hand was used. Having measured the movement of the cable (22mm) and the required force from the native system, I chose the ds3115mg servo.

Elementary design: Arduino nano battery, two servo buttons.

Buttons pulled up to 5V through an internal resistor.

In the plans

Add wheel speed sensor.

Add BTLE for sync and data transfer to STRAVA.

Make the body of the device in the form of a lantern with a display showing the current speed and a servo drive inside.

Replace the servo with a feedback actuator.

Attention, question

Do you think it is worth trying this solution for entering crowdfunding??

Strava-connected bike computer, electronic gear shifting and all in flashlight housing with flashlight function, automatic switching from cadence or slope. And all this for less than 100

Friction transmission

This type of electric drive, although it is found on the market, is not very popular. Its principle is simple. The motor is installed directly at the drive wheel, the torque is transmitted directly from the stator shaft to the tire. It would seem that everything is simple and obvious. But what may be applicable for children’s electric cars and bicycles is of little use in the real use of transport.

  • There are no transmission links, that is, the possibility of increasing the angular speed of the wheel due to the use of gearboxes is excluded;
  • Extremely low efficiency;
  • Even a slight drop in pressure in the wheel chamber will dramatically reduce the efficiency of such a drive.
  • Constant friction between the engine friction and the tire tread drastically reduces tire durability.
  • In wet weather, muddy roads, frost, the coefficient of friction will significantly decrease, the clutch will slip, which will reduce the already low energy efficiency of the drive.

The only advantage of this system is its ease of installation, which does not require any deep alterations of the bike.

No, if you plan to rework with real improvements in the performance of the bike, it is better to abandon such a scheme right away.

Tips for choosing a bike with speeds

Today, high-speed bicycles prevail on sale, so there is plenty to choose from. All classes fall into this family:

  • MTB;
  • hybrids;
  • road bikes;
  • road bikes.

To choose the right speed model for yourself, you need to decide where and on what routes you plan to drive. For example, for city riding, you do not need to take a professional mountain or road bike with a lot of gears, a classic road model or a bicycle on a planetary hub will suffice. However, the latter are distinguished by an overpriced.

In addition to the purpose of travel, cost plays an important role, and both of these factors are closely related to each other. For trips in aggressive driving and tourism conditions, you should not save on the model. you will have to spend more on maintenance and rework. If the goals are modest, for example, a couple of times a week to roll out 50 km, then you can choose an inexpensive model. it will be economically justified

And of course, we pay attention to brands and fakes for them.

The bike should be comfortable to travel. Multi-speed models make it possible to evenly distribute efforts, make movement more comfortable

But do not forget about such an important parameter as the size of the frame. It must fully match the height of the cyclist.

There are size tables for verification, and of course, we pay attention to our own feelings when trying on a bicycle.

Frames are divided into male and female. The latter are designed for the convenience of cyclists to get off and on the bike. In principle, both male and female frames will be comfortable for men, but women on male frames would be uncomfortable.

Taking into account these simple recommendations, you will be able to choose a bike that suits you and enjoy riding for more than one season.

Going down the hill

If you have a free-wheeling bike hub, then any descent is an opportunity to relax and ride with the breeze without effort. But there are some subtleties here: it is best to control the speed with both brakes at once, starting from the rear: this way the pads will last longer, and the risk of accidentally flying over the steering wheel (for example, if the rear brake cable breaks on a particularly steep slope and emergency braking by the front one) is much lower.

Owners of fixed gears that are not equipped with brakes will have a harder time. If the descent is not very steep, and your feet are strapped to the pedals, you can simply relax, but otherwise you can use a technique similar to the one above. But the efforts should be directed not in the direction of the pedal stroke, but in the opposite direction. The pedal should be pushed when it is about to go back.

We go up the hill

Instead of circular uniform pedaling, you should switch to sequential: that is, you need to press on the pedals alternately with different feet. The easiest way to do this is by standing on them, and alternately transferring body weight to one or the other leg. But sometimes, if the climb is especially steep, this is not enough (and it is problematic to do this on a fixed gear).

In this case, a technique similar to rowing will help, but it is not the arms that work in it, but the legs. You should bring your tailbone back as much as possible (you can generally hang it from the saddle) and stretch your arms, imagining that we are hanging on a horizontal bar. If you do not lean your tailbone against a bicycle saddle, your back muscles will also participate in pedaling, which will further increase its effectiveness. The pedals should be pushed alternately, and the maximum force should be applied at the moment when the pedal is at the highest point of the trajectory, the force vector should not be directed downward, but forward. For more authenticity, you can imagine that instead of a rudder, you grabbed the oars.

Another trick: on a wide road, you can move not straight up, but at an angle, that is, with a snake. To do this, simply shift the wheel to the opposite side after a few jerks. Let the distance traveled increase, but the steepness of the ascent becomes less.

Well, if the slide is too steep, you can spare your pride by dismounting and rolling your bike into it with your hands. No wonder the fans of this bike joke that in fact they have not one gear, but three. sitting, standing and walking.

Cycling Gears Explained // Cycling Made Simple

Dignity

All its advantages are due to the design:

  • Cheaper. If you buy new sprockets, a special chain and chain tensioner for it, it will still come out significantly cheaper than buying a multi-speed system. And if you wish, you can get by with the old rolled components, which can be obtained for a penny or even free of charge.
  • durable and more reliable. In a simple design, there is simply nothing to break. It has a shorter chain that is always taut, runs in a straight line between the two sprockets and is less stressed. Due to this, one chain lasts much longer: some do not change it at all for many seasons, forgetting to even lubricate it in time. Yes, the chain squeaks and crunches, but it still fulfills its function. And the sprockets in general can be used two times: their teeth are ground only on one side, but since they are symmetrical, the killed star can simply be turned over, after which you can leave the same amount on it.
  • Easier to maintain. With it, you don’t have to bother adjusting switches, cleaning them from dirt and adjusting them. It is much easier to clean the chain, and you can also install its full protection, which prevents sand, soil and dust from getting into the links. And if you assembled a bike using old parts, you don’t have to think about maintenance at all, only occasionally lubricating the chain.
  • Gives a lot of stress. If your goal is not just a relaxed ride around the city, but how to load the muscles of the hips and calves. You will not be able to skid on it, relaxed driving up the hill in a low gear. Yes, the first time will be difficult, but after adaptation, you will be guaranteed deep satisfaction from overcoming each difficult section of the route.
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Flip flop hub: all the pros of a fixie, but no downsides

For beginners who have not yet fully mastered the art of riding a fixed, they came up with special double-sided bushings called flip-flops. On one side of it, a deaf gear is installed, and on the other, with a free wheel. As a result, you just need to flip the rear wheel, and the fixed gear turns into a regular single speed. It is interesting that this design can be used for another purpose: by installing stars with a different number of teeth, you can easily change the gear ratio by turning the wheel.

New bicycles sold with such hubs have another indulgence for newbies: they always come with hand brakes. However, it is not necessary to use them, and having decided to completely switch to riding in the fixie style, you can completely remove the brakes.

Whichever option you choose, you will in any case have to learn to ride up and down the hill, so at the moment it is worth considering in more detail.

How to ride the hills: subtleties and nuances

If you immediately start doing all the climbs in a row without proper preparation, then you will provide yourself with a serious load on your knees. Get used to the load gradually, increasing over time the distance traveled, as well as the number of climbs, and you will be fine. And now more about driving technique.

What not to do

For high-quality shifting on transmissions of the low and medium price range, it is recommended not to do the following:

  • Switch speeds under load.
  • Switch multiple speeds at a time.
  • Start in not fully shifted gear.
  • If the chain is pulled under the carriage or bushing, do not try to pull it out by pushing the pedals harder.

Now let’s finally figure out how to switch speeds on a bike in different situations. In addition, we will study some of the features and secrets of switch control, as well as tricks for caring for the transmission.

Road bikes

The city also includes full-fledged road bicycles. light, mobile, with wheels 700×19-35s and a very high gear ratio, they are designed to ride on a prepared surface and are capable of developing a fairly high speed.

On a true road bike, you won’t be able to switch gears like you would on bikes with triggers. The fact is that sports road bikes are equipped not with ordinary shifters, but with monoblocks, more often referred to as pistols. Here, switching takes place with the help of the brake lever, which, in addition to direct pressure, can also deflect to the inner side of the steering wheel. Thus, the transmission on the cassette is lowered. It can be raised with a separate lever under the thumb.

Professional bikes

The flagships of the cycling industry have a wide variety of transmissions. On mountain models, the set most often has one star in the front and 11-12 in the back, some elements are made of carbon and titanium. Narrow bikes for street, BMX, trial and the like do not have speeds at all, and a driver for 8-10 teeth is usually installed at the back.

In addition to standard manual transmissions, there are also electronic gear shifters. They are controlled automatically or by the same shifter, but they are not yet very popular due to the huge price and complex maintenance. The gearshift cable is not used on bicycles with this transmission.

It is worth noting that each type of bike has its own gear ratios, which help to solve exactly its tasks. So it’s not a good idea to mount road cranks on a dirt bike.

We’ve figured out the types of bicycles and their shifting systems. And how gear changes on a bicycle from a technical point of view?

How to switch speeds on a bike: rules and basic mistakes

All truly modern bicycles are equipped with a large number of speeds, which greatly simplify the riding process. Different gear ratios allow you to change the speed depending on the terrain, road congestion or the banal fatigue of the rider. But for all this to be of practical use, you need to understand how to switch speeds on a bicycle, and do it correctly.

What speeds to use?

Many novice riders are also interested in which bike speeds should be used more often, and which should not be touched at all. Unfortunately, this question cannot be accurately answered, since all transmissions and people are different. Someone likes fast and aggressive driving, someone more measured, away from mud and extreme, and accordingly, the sets of speeds used will be completely different.

One thing is for sure: in 80% of cases, ordinary users practically do not use the left shifter, but simply put the second gear and eat until the star is erased. Indeed, set 2 / (where is any cassette gear) is very popular, as it contains most of the most used gear ratios, but it is worth using other speeds to extend the life of the transmission.

Planetary systems

In addition to the familiar external switches (in the form of a dangling foot on the rear wheel), there is another fairly common type of gearbox. planetary hubs. The mechanism of operation is such that a system of gears with a set of different gear ratios is located in the housing of the rear hub. This design is very well protected from dirt and moisture, which allows it to work for many years even without special maintenance.

Shimano Inter 3 and most Sram hubs use a clickbox as a derailleur. If you look closely, on the right side of the frame, on the rear wheel axle, you can see a cable line or a plastic box on the nut. this is the clickbox. It controls the gears inside, and itself is controlled by the shifter. The speed switch on the handlebars on a bike with a planetary gear is visually no different from a grip shift, but at the same time it has a set of other indexes and therefore is not compatible with conventional transmissions.

On some bushings, for example, the Sasch S7 and in general all versions of those bushings, to switch it was necessary to act like this:

  • During acceleration / deceleration, stop pedaling.
  • Switch the speed on the shifter.
  • Start pedaling in a new gear.

If you do not stop spinning, the gear will not change. Shimano Inter and Sturmey Archer do not have this feature.

Malfunctions

Breakdowns in the transmission are many times more common than with other components, and sometimes a number of problems can arise during shifting:

  • The chain tries to grab, but jumps back.
  • The rear derailleur on the bike does not respond in any way to the position of the shifter.
  • Shift index does not match gear.
  • The chain sags and falls.

All of the above symptoms can indicate a malfunction of the switch or shifter, but in some cases this can be triggered by a simple break in the cable. Damage or resetting of the derailer often leads to incorrect switching. You can correct this in a matter of seconds yourself, even without tools, simply by unscrewing the cable setting on the shifter or near the switch by a few turns. In addition, derailleurs often take over all side impacts and dutifully tolerate your carelessness in speed selection.

Converting a bike into an e-bike

I would like to ask, paraphrasing the classic: what biker does not like fast driving? Of course, good sports bikes maintain a significant level of speed, but the maximum that can be squeezed on a regular bike is 30-35 km / h. And then, if the cyclist is an excellent athlete. The desire to equip a bike with an electric drive sooner or later appears in everyone who wants to improve the characteristics of their bike. Today this can be done quickly and easily by installing a special electrical kit.

DIY electric bike

In our high-tech age, more and more people are betting on electric personal transport. An electric bike completely replaces a car, and the advantages of such an alternative are obvious: savings on gasoline and no poisonous exhaust, the ability to develop a decent speed and travel long distances. An important advantage of an electric bike is that not only young, strong and tough guys and girls, but also people with disabilities and weakened health can ride it.

Everyone can buy an electric bike today. the popular two-wheeled transport is represented by a rich assortment on the market. The best option for a stylish, modern and comfortable means of transportation around the city and beyond can be, for example, the Wellness CROSS DUAL electric bike. Despite its low weight for an e-bike (23.5 kg), it is capable of speeds up to 40 km / h and travel up to 60 km on a single charge of a lithium battery. The bike hybrid has a sleek design, 26-inch wheels, modern equipment, an informative display and disc brakes.

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If you do not want to part with your favorite bike, then converting it into an electric one is as easy as shelling pears. We will not cover the conversion process from scratch, but find out how to quickly and effortlessly electrify a bike using a kit.

DIY e-bike assembly

Converting a regular bicycle into an electric one from inexpensive components is possible, but this requires knowledge, experience and a lot of time. It is much easier to purchase a dedicated e-bike kit. Modern electric kits will allow you to quickly turn an ordinary bike into a high-speed bicycle hybrid and immediately try it out in action, without having any special skills and knowledge in the field of electrical engineering. However, basic knowledge about the operation, design and principle of operation of the bicycle hybrid is still needed.

Before you start converting your bike to an e-bike, prioritize. Decide how fast you want to drive, how much distance to cover on a single battery charge and what to conquer landscapes. And most importantly, what is your budget.

Before work, you must:

  • Measure and carefully inspect the frame on the basis of which the assembly will take place.
  • Determine the rim diameter of your bike. Which wheel motor should be chosen directly depends on this. The smaller the diameter, the more revolutions are needed to achieve the same speed (and the cost of the motor will increase). Rims with a diameter of 26 inches are considered common.
  • Find out the engine power. The power indicator determines the speed, acceleration dynamics and traction qualities of the future bicycle hybrid.
  • Decide on the type of engine. Gear motor-wheels are lightweight and do not make the bike heavier. They are compact and almost invisible. They have a power of 250-500 W, good torque and great reel. Such motors are suitable for lovers of low speeds up to 25-30 km / h. Direct drive wheel motors are quite reliable and quiet. They are characterized by high power (500-1000 W) and high speed. These engines are designed to operate as a regenerative generator.
  • Select the location of the electric wheel (conversion kits can contain both front and rear motorized wheels). The front wheel hub motor is easier to install and fits on almost all bikes. This engine layout is characterized by high torque and speed. However, for off-road driving, it is better to choose the second option. the rear wheel. Installation will take a little longer, but acceleration dynamics and traction will be higher.
  • Choose a suitable battery, determine its type, capacity and voltage. Riding time and mileage depend on the capacity of the battery. Lithium batteries are considered the best, they are also one of the most expensive. Lead acid is cheaper, but very heavy. Remember to match the voltage of the kit. When upgrading a bike, you will have to spend money on the battery, but it is better to immediately choose a high-quality and reliable one with the best characteristics.

Electric bike conversion kits include all the necessary components:

  • Electric wheel, spit into the rim of the required diameter;
  • A controller that controls the supply of energy to the engine;
  • Brake levers with built-in sensors to shut off the engine when braking;
  • Throttle stick or throttle trigger;
  • Instrument panel (LED or LCD display);
  • Braid;
  • Pedaling assist system (PAS sensor).

To install the kit, you will need a set of wrenches, a screwdriver and some free time.

  • Remove the old wheel, tire, tube, brake disc and ratchet.
  • Install all these components in reverse order on the new wheel motor.
  • Set the controls of the kit to the steering wheel.
  • Install the battery in the frame triangle or on the trunk.
  • Install the controller, connect the wheel motor, controls and battery to it.

Now you can test your e-bike! But remember that with the upgrade you get powerful vehicles with high speed performance. Although rights are not required for it, traffic rules must be observed in full. Do not try to accelerate to the maximum on the first day. increase your speed gradually. And don’t forget your protective gear. Then riding an electric bike will bring only positive emotions.!

How many bike speeds do you need and how to switch them?

A common but diminishing misconception that the more speeds the better.

Need to ask the question which is better? Or who is better?

Today you can find solutions from 1 to 33 speeds. In various combinations: 1×7, 1×11, 2×9, 3×10 (the first number is the number of stars in front, the second number is the number of stars on the back of the cassette). Multiplying these numbers, you get the maximum number of speeds that you can “turn on” while riding.

What does it mean to change gear?

Gear shifting is a chain transfer from one chainring to another. Thus, the gear ratio and the force “on the pedals”.

First of all, for comfort. Gears allow you to save power and choose a comfortable pedaling mode based on:

  • The relief of the road (plane, ascent or descent, acceleration or smooth braking);
  • The quality of the road surface (highway, country road, mountains);
  • Required speed;
  • Weather (tailwind or headwind);
  • The physical condition of the rider.

With the right gears:

  • Move faster and more economically (in terms of physical strength);
  • Get a longer service life of the bike components;
  • Reduce stress on knee joints.

And also go faster downhill, climb uphills with less effort, or drive at a comfortable constant speed.

Rear on the cassette, if the bike is multi-speed, usually from 5-11 stars. So transmissions are 7/8/9/10/11 high-speed.

If the bike has 6-7 speeds, then it has one front sprocket (gear) and a rear cassette of 6-7 stars. If 18 or more. there are 3 chainrings and a rear cassette of 6-7 stars. Sometimes the rear cassettes are 9-10-11 stars, which allows you to bring the number of speeds to 27-30.

Why did everyone want to make faster speeds before??

It was considered, not unreasonably, that the greater the gear ratio on a particular bike, the more accurate the gear can be selected for a specific terrain. It really is.

However, today they still come to the conclusion that you can get by with fewer sprockets on a bicycle. Thus, greatly saving weight, since the extra stars in the front and the front derailleur are removed.

Why does the chain not fall off one sprocket in front?

Development of recent years. a special Narrow Wide chainring with variable and higher cross-section of teeth, as well as a special rear derailleur that dampens all unevenness. All this together eliminates the need for a chain damper on the chainring.

The tendency is that the higher the class is the transmission. from 7 to 11 speed, the more expensive it is.

  • 7-9 speed bikes are put on the most affordable bicycles;
  • 10 speed bikes can be found on middle class bicycles;
  • 11 and even 12 speed versions are found on professional models.

The more stars there are in the cassette, the closer they become to each other and the chain will be thinner. From this, the price of such a product will be higher, and the durability is lower.

What do the numbers mean in the description of the transmission 48x36x26T?

They represent the number of teeth on the sprockets. If you are a beginner, then the information is almost useless for you as there is nothing to compare with. But if you are already an experienced bike enthusiast, you can choose a new transmission or bike according to your preferences based on the experience of previous bicycles.

How to properly switch gears on a bike

If you want your chain and sprockets to last as long as possible, it is recommended that you switch at minimum load. Let us explain. shifting in the middle of a climb puts a very heavy load on the transmission, which can lead to situations up to a derailleur break or an open circuit.

Also try to shift early and avoid excessive chain skew.

After riding for a while, whether you lubricate the chain or not, attention to the drivetrain may be required. The chain may stop switching perfectly as at the very beginning. Problems can be as follows:

  • The gearshift cable is stretched. it is required to pull up with a special lever on the shifter or switch;
  • Too much dirt has accumulated in the cable jacket. it is better to replace it together with the cable;
  • Rear derailleur not configured. tuning required, better in a workshop.

What types of steering wheel switches are?

They switch gears with special handles on the steering wheel. shifters. They are:

  • rotary. gears are switched by turning the knob;
  • (revoshift and grip-shift, grip-shift). when you rotate the handle towards yourself or away from yourself, the speed is switched.
  • lever. gears are switched by special levers.

Dedicated finger levers. One switches to a higher speed, the other to a lower one. These shifters are more convenient for many cyclists, less whimsical to maintain, but often more expensive.

Typically, the left shifter is responsible for shifting the three front gears, and the right shifting gears in the rear cassette. Thus, the left derailleur and chainrings are used to adapt to the main type of terrain. And the right one for private and short-term changes during the trip.

professionally speaking, changing the speed changes the cadence. Cadence is the cadence and the required pressure applied to the pedals by changing the gear ratio between the wheel and the pedals. Cadence is important in terms of strength and health benefits to evenly distribute the energy expended in pedaling.

The optimal cadence is considered to be in the region of 60-100 rotations per minute.

If you are riding uphill or on uneven terrain, you need to make a lot of effort to pedal, which, for a long time, can lead to arthritis. Turning on a low speed will make it easier for yourself to pedal, reduce stress on muscles and joints, but the bike will go slower.

On a flat track or when descending a mountain, you must turn on a high speed, then more effort will be required to pedal (compared to models without speeds or other gear), but the two-wheeled horse will become faster, more stable, it will move smoother and more stable.

So how many speeds do you need to be happy??

Let’s answer this question as follows. As in the article how much does a good bike cost, we will note that it all depends on the use of the bike and the place of riding.

If you only ride on paths in a park or sidewalk, you really don’t need the speed on your bike. But fans of cross-country driving, long journeys with alternating ascents, descents and flat areas, real athletes will appreciate this parameter.

For city and folding bicycles, there is no need for more than 7-9 speeds. For them the thesis “the more the better” does not work.

For mid to high end mountain bikes, 1×10, 1×11 (One star front and 10-11 rear) solutions are already available today. At the same time, “only” 10-11 speeds are enough even for mountainous terrain. On more affordable bikes, options like 2×10, 3×9 are more common.

For amateur riding, 18 speeds are enough. Driving in a city, park or woodland is less demanding on gear ratios.

What are high-speed bicycles

By the type of transmission, bicycles with speeds can be divided into three types:

  • with double shifting system: mountain bikes, road bikes and hybrid bikes;
  • with a single gear system. high-speed road models;
  • planetary velocity models.

The dual gearshift system has two star systems. at the front of the bottom bracket and at the rear hub. For the chain transfer along the front and rear sprockets, the corresponding switches are responsible. front and rear. Standard systems:

  • 3 x 7;
  • 3 x 8;
  • 3 x 9.

There are several rear sprockets for one chainring: a large chainring in front is combined with small rear ones, and vice versa. Average values ​​such as 2 x 5 are commensurate with the gear ratio of a single speed. The switches are controlled by shifters located on the steering wheel: on the left. front, on the right. rear switch.

A single gearshift system includes only the rear cassette, one derailleur and, accordingly, one shifter. In front, the chain only runs along one leading star, like on a single speed.

City bicycles with speeds make it possible to move more comfortably on roads with inclines, have a more developed braking system. front and rear v-brake versus the rear drum brake of a conventional bike.

It is worth noting that in the city high-speed roadways run better than mountain ones: there are high gears, large wheels, the geometry is sharpened for movement on flat roads.

The planetary gearshift system is located in the rear wheel hub. The planetary hub transmission combines the characteristics of a single shift system and a single speed:

  • rear derailleur shifter;
  • one front and one rear sprocket;
  • the chain is short, runs straight.

Gear shifting is carried out while coasting, in contrast to the classic system, where the chain is thrown over the stars when pedaling.

  • the mechanism is completely protected from dirt, water, dust;
  • durability;
  • does not require maintenance and repair;
  • more convenient to change gears.

Disadvantages of planetary hubs: significant weight gain, high friction and low endurance of mechanisms, high price of the bike. With this in mind, it is advisable to use the planetary only in urban driving conditions and on suburban highways.

How to remake Singlespeed

Let’s try to turn a regular bike into a high-speed one with a single shifting system. For this you will need:

  • singlespeed;
  • non-brake bushing;
  • v-brakes or pliers, front and rear;
  • rear cassette 6 stars;
  • two chains for a high-speed bike;
  • switch;
  • shifter;
  • switch cable;
  • clamps.
  • spanners;
  • squeezing the chain;
  • cassette remover;
  • grinder.

At the very first stage, you should choose the type of brakes, which we will then install on the bike. We look at the feathers and the fork. if they do not have seats for the brakes (they are not provided on classic frames), then we purchase pliers. If there are sockets, we take v-brake. Another, more complicated, option is to place a similar fork under the vectors, and put a tick back. In this case, you will have to remove and change the plug.

How to convert a single speed bike into a multi speed bike. step by step instructions:

Remove the rear wheel with a wrench and disassemble it.

Open and remove the chain. you will no longer need it.

Make one of the two chains, with 128 links for a 6-speed cassette. To unclamp additional links to the standard chain and connect them, you will need a squeeze.

Next, you need to put a non-brake hub in the rear wheel. The work is divided into 3 stages: dismantling a conventional bushing, re-spacing the wheel and installing a new bushing. It is quite difficult to do the repositioning, therefore it is better to entrust this work to the master. A simple option is to purchase a ready-made wheel with a 6-star cassette.

If you install the sprockets yourself, you will need a cassette remover.

It will not work to put the rear wheel on the stays of a standard frame. the speed hubs are wider. To do this, you need to unclench the feathers by 2-3 cm.This is easiest to do on the machine.

The next step is to install the derailer. the rear derailleur. Choose a device with an axle mount, because no special attachment for classic frames.

Apply front brake. standard procedure.

The front sprocket on single speed bikes has thicker teeth so the speed chain will not fit. We remove the star paired with a connecting rod, grind the teeth on a milling machine.

Assemble the bike: place the wheel on the feather dropouts, the chainring on the bottom bracket and clamp the chain.

When the rear wheel is in place, apply the rear caliper brake.

Installing the rear shifter for the derailleur on the right side of the handlebar.

Connect the shifter and the switch, fasten the cable to the upper tube of the frame with clamps.

By changing the configuration of the transmission and installing a new braking system, a simple bike can be turned into a high-speed.

Speed ​​bikes

The high-speed bike has a multi-stage transmission, which fundamentally distinguishes it from the classic bicycle with one gear. A big problem for singspeed (single-speed) is steep and long ascents, especially without perpendicular slopes of the road. The low gears of the high-speed bike reduce the speed, but make it possible to overcome the hills without additional power costs. High gears allow you to accelerate the bike on level ground, and it will outperform singlespeed in speed.

Advantages and Disadvantages of a Speed ​​Bike

For trips around the city on flat roads and simple rides in parks and embankments, the presence of a high-speed bike is not essential. A simple one-gear touring bike is fine here: it is both cheaper and does not require frequent maintenance.

Another thing is long trips on highways, dirt roads and, even more so, off-road. Here you will need a more stable bike that will pass under any conditions, save energy, and make the trip more comfortable. It is difficult to imagine a long tourist route on a single speed, to put it mildly, although, in principle, nothing is impossible.

Compared to a single-speed model, a bicycle with a multistage transmission has several advantages:

  • climbing hills in low gears;
  • less power costs in a headwind;
  • acceleration on flat areas;
  • maximum accuracy of adjusting the bike to specific riding conditions (especially on models with a large number of gears);
  • constant cadence, less fatigue;
  • the braking system of high-speed bikes is more powerful than singlespeeds.

Let’s see on the other hand how single-speed models outperform their rivals:

  • the bike is cheaper;
  • undemanding to maintenance of the transmission: the chain and sprockets are designed for almost the entire life of the bike;
  • if the chain is replaced, it is easily rubbed against the old stars;
  • singlespeed gives a good workout for all leg muscle groups on the rise;
  • allows you to develop the skill of high-frequency pedaling.

The controversial advantage of the single-speed model is the reduction in weight due to the absence of switches and cassettes. Only valid when comparing identical models with and without cassette. To put in one row, for example, a light road bike with speeds and a steel road road in this sense is wrong.

Tips for choosing a bike with speeds

Today, high-speed bicycles prevail on sale, so there is plenty to choose from. All classes fall into this family:

  • MTB;
  • hybrids;
  • road bikes;
  • road bikes.

To choose the right speed model for yourself, you need to decide where and on what routes you plan to drive. For example, for city riding, you do not need to take a professional mountain or road bike with a lot of gears, a classic road model or a bicycle on a planetary hub will suffice. However, the latter are distinguished by an overpriced.

In addition to the purpose of travel, cost plays an important role, and both of these factors are closely related to each other. For trips in aggressive driving and tourism conditions, you should not save on the model. you will have to spend more on maintenance and rework. If the goals are modest, for example, to roll out 50 km a couple of times a week, then you can choose an inexpensive model. it will be economically justified. And of course, we pay attention to brands and fakes for them.

The bike should be comfortable to travel. Multi-speed models make it possible to evenly distribute efforts, make movement more comfortable. But do not forget about such an important parameter as the size of the frame. It must fully correspond to the height of the cyclist. There are size tables for verification, and of course, we pay attention to our own feelings when trying on a bicycle.

Frames are divided into male and female. The latter are designed for the convenience of cyclists to get off and on the bike. In principle, both male and female frames will be comfortable for men, but women on male frames would be uncomfortable.

Taking into account these simple recommendations, you will be able to choose a bike that suits you and enjoy riding for more than one season.