How to choose
The modern rear shock absorber of a bicycle has a large number of settings. This component is selected taking into account the transport model. It is most commonly used in mountain biking. The shock absorber can be linear, which means that it takes a lot of effort to compress it. All spring models work according to this principle. Comfort of movement depends on the quality of the shock absorber, so the stronger the structure, the better for the bike.
The load on the rear shock is always heavy, so don’t skimp on this part of the bike, especially if you’re cycling. Select the rear shock absorber lengthwise. It ranges from 125 mm to 220 mm. For fastening the elements, special caps and bushings are used. In progressive (air) dampers, increasing force will be required to compress.
When compressed, the volume of the air chamber decreases and the pressure increases. Knowing the difference between linear and progressive elements, you can choose the right option for your bike. It is important to consider the frame design when choosing a shock absorber. The best option is the spring type. It works linearly, doesn’t weigh it down too much or make it stiff.
Upgrading Your Rear Shock. What’s Needed | Mountain Bike Rear Suspension
Bicycle shock absorber rear: functions, settings
The rear shock absorber of the bike is one of the suspension elements of the bike. This part can be spring or air, with or without a stable platform. Ride safety, ride comfort, obstacle avoidance. it all depends on the correctly selected and tuned shock absorber.
What is it
The rear shock absorber of a bicycle is a device that serves to eliminate and absorb shocks, vibrations, and shocks when traveling on uneven roads. Off-road conditions negatively affect the bike frame and the entire structure, therefore, if the cyclist uses the bike for long trips not only on asphalt, it is advisable to additionally purchase a rear shock absorber. Bicycles are equipped with spring or air shock absorbers. The spring has a large enough weight and a stiff stroke. Air-oil are lightweight and smooth running.
Full suspension bikes are a design with two shock absorbers, front and rear. The front fork is standard and the rear fork is optional. This part makes cycling more comfortable. If you add a rear shock to the structure, it will become heavier, and the operating conditions will change. This detail fits perfectly into mountain bikes, suitable for a sporty riding style.
Do you need a rear shock on a bike? In most cases, suspension systems are installed in the front end, they are also called “fork”. Such a device dampens shocks and vibrations in the part of the frame on which the front wheel is mounted. The rear shock absorber is considered optional and is installed primarily in mountain models. Most of the load falls on the front wheel. A bike with two shock absorbers is called two-suspension. By type, these elements are spring, spring-elastomeric, air, oil-air and oil-spring. The spring of a part has characteristics such as stiffness, recommended stroke, inner and outer diameters and lengths.
What is it needed for
The design of the bicycle includes an element such as a shock absorber. Thanks to him, you can operate the bike for a long period of time and not feel discomfort while driving. The rear shock absorber of a bicycle consists of a spring and a damper. Springs reduce shock load on the frame when driving on uneven roads at high speeds.
Consequently, the cyclist also does not experience a strong load while riding. Dampers dampen vibrations and stabilize the bike’s position. This system is optional, so it is not available on some types of shock absorbers. Rear springs are fitted to sports models and are not used on road or road bikes. Sometimes they are mounted on regular bikes to increase ride comfort.
What to do if the bike’s rear shock squeaks? This element is a complex structure, so it’s not quite easy to figure it out the first time. The most common causes are lack of lubrication, mismatched parts and poorly tightened bolts. During adjustment, it is important to consider such a concept as shog. This is the difference in length between the compressed shock absorber under the rider’s weight. Seg should be set correctly, otherwise the part will not work fully. Expose it in the range from 23 to 33% of the stroke. If the shog is large, the suspension works softly, and if the shog is small, it works hard.
A bike’s rear shock setting is influenced by several factors: preload, rebound, and compression. In the first phase, the suspension fork will resist the rider’s weight. First, change the element’s subsidence percentage. The best option is 25%. If the bike is designed for fast riding and descents from the mountain. 30%. Most rear shock models have a retaining ring that measures the level of sagging.
Adjustment of the rear shock absorber of a bicycle is carried out independently or with the help of a specialist, regardless of the bike model and the cost of the element. The spring of the shock absorber is sufficiently resilient and durable. Sports models use expensive rear shock absorbers and above. The simplest elements cost about 400 rubles. Despite their budget price, they are made of steel and can withstand pressure up to two thousand kilograms.
MTB Shock Tech | Everything You Need To Know About Mountain Bike Rear Suspension
Cycling safety do you need a rear clearance
Having made a purchase of a bicycle, many of us often stop at this stage, forgetting that cycling must be comfortable and safe. And even if the purpose of buying your bike is short walks in the park and outside the city, you must remember about your safety. The main element of safety is identifying oneself on the road, since in our country a cyclist is a road user along with motorists. It should be noted that the cyclist must be visible both in the dark and in the daytime. The driver of the car must see the cyclist as best as possible and must notice him on the road as early as possible in order to prevent adverse situations. It doesn’t take much to identify yourself.
The next step after purchasing a bike is buying dimensions for it! The bigger, the better; the brighter, the more visible. Forward. white light, back. bright red flasher. When choosing, pay attention to the following features:
Operating mode: almost every flasher has at least two modes. continuous glow, which is used when driving in a group and in complete darkness, and flickering. used when driving at dusk and in conditions of illumination of roads.
Viewing Angle: The wider the better. Or use multiple back gauges, as I like to do
Very often there is a problem with the visibility of the flasher when placing a bicycle bag, bicycle bag on the trunk, in this situation the choice of fastening saves: a clip, a flasher on the trunk or a standard clamp on a seatpost, which, of course, is better to use without the presence of things on the trunk.
In addition to size, do not forget to wear bright clothing, reflective clothing and clothing with reflective elements. It is necessary to have sufficient lighting. a bicycle headlight, with a good fastening on the handlebars, we all know perfectly well our flawlessly smooth roads and ideal illumination of every street in the city. And outside the city, even more so, without light. nowhere.
I notice that every day there are more cyclists on the roads of our city. On the one hand, it is very pleasant and joyful to see, but on the other hand, you see the lack of a culture of behavior on the roads, not observing traffic rules. And we, in turn, expect a good attitude from motorists. No excuses: “I drive carefully”, “I am always in control of the situation”, “I can clearly see what is happening on the road” will not help to avoid accidents, only a correct, careful approach to cycling is a guarantee of returning home without unpleasant incidents.
So, in the dark, a cyclist on a road without a rear clearance is INVISIBLE to a motorist. Why are you putting not only yourself in danger, but also other people?.
I understand that most of them will not even read this article, but you tell them all, go to the flashing lights!
Maximum load on the bike
Many manufacturers do not specify the maximum load on their bikes in any way. The implication is that the average adult bike will withstand a margin. Those manufacturers who indicate the maximum weight of a cyclist usually give figures in the range of 105-115 kg. So, if your weight fits into 100 kg, then any quality bike will suit you.
Naturally, you need to understand that jumping on curbs on a road bike is not worth it. That is, the bike must be used in accordance with its intended purpose. If your weight exceeds 100 kg, then it is worth choosing a bike taking into account additional conditions.
What are the most durable bike types? Usually these are either mountain bikes, designed for relatively tough operation on rough terrain, or rugged city bikes, which did not save as much on bike weight. It’s better to look for a bicycle for a man of 120 kg on your own.
There are not just bicycles, but super-bicycles, champions in their niche. Let’s tell a little more about them.
In our time, there is a great variety of different vehicles. And every year there are more and more of them. How did it all begin? One of the most common answers to this question is the bicycle. Although this is not entirely correct, today we will talk about it. By definition, it is a vehicle on wheels that is propelled by the force of a person’s muscles through the pedals.
A long time ago, a person thought about how to facilitate the overcoming of long distances and with the help of what it can be done. So, the prototype of our modern bicycle was born. And it happened in 1817. German scientist Karl Drez invented the first scooter in history. It was very similar to our bike, though without pedals and with a wooden frame. And in 1884, the Englishman John Starley created the bicycle itself in the form that we are used to seeing today, and called it the “Wanderer”. This is how the history of the world’s most widespread environmentally friendly mode of transport began.
Currently, there are more than 30 varieties of “bikes”, as the common people often call them. They are all designed for a wide variety of needs, but the principle of operation is the same.
- by the type of movement: road. for long trips, road. for moving in urban areas, extreme. for sports competitions, mountain hardtails are perfect for road surfaces with different levels of difficulty, cross-country. for moving over rough terrain, etc. ;
- by the level of professionalism: for amateurs and beginners, experienced cyclists and professionals;
- by design features: compact (folding), 2-hanging, 3-hanging, with a female frame.
- by manufacturer brands (Stels, Merida, Stark, Giant, Trek, etc.);
- by age: children’s bicycles, as well as adults and teenagers (bicycles for girls and boys, taking into account age characteristics);
- by material of manufacture: carbon, steel, aluminum, etc.
Big record bikes
Longest bike in the world: According to the Guinness Book of Records, it is longer than the longest limousine car, which is “only” 30.4 meters long. The bike is the creation of a group of enthusiastic cyclists called Mijl Van Mares Werkploeg from the Netherlands. To create it, they used elements of aluminum structures intended for the installation of lighting devices on concert stages. The strength of these structures is sufficient to support their own weight and withstand the loads occurring at such a length with practically no sagging.
The tallest bicycle in the world was created in 2012 by a welder from Cuba, Felix Guirola. His brainchild reaches 5.4 meters in height. He designed and built it himself. In appearance, this design is not much like a bicycle. However, the presence of a seat and pedals with which it moves, as well as a pair of wheels, still confirms this. To get to the seat, there is a special ladder with which the device is equipped. By the way, three assistants who helped Felix climb up, and accelerated the bike at the beginning of the journey, accompanied him all the way, so that in case of a fall, pick up the unfortunate. Passers-by perceived such a spectacle with humor.
The largest wheel size on the planet is the great “Frankensike”, invented in 1989 by the American Dave Moore, who hails from California. The height from the seat to the ground is 3.4 meters and the wheel size is 3.05 meters. Daredevil Steve Gordon made a trip on it without insurance on June 4 of the same year.
The longest two-wheeled bicycle was created by Terry Tessman, a resident of New Zealand. The length of this vehicle is more than 22 meters with a mass of 340 kg. Four people managed to ride it at the same time in the winter of 1988.
Interesting! The bicycle of Australian Neville Patten is considered to be the smallest, the wheel size of which is slightly less than 2 cm. The most amazing thing is that the designer was able to ride it as much as 4 meters. This is a record!
The text was prepared by Roman Borisov.
Posted May 3, 2020.
Sources: 24smi.org, velodrive.ru, popmech.ru.
Categories: Selection, Brands and types, Microrecords.
What are shock absorbers for?
Traditionally, shock absorbers for bicycles consist of leaf springs (springs) and a damper. The springs, as a more powerful element, help to reduce shock loads on the frame and the cyclist when driving over bumps at high speed. The damper functions include vibration damping and position stabilization. It should be noted that the damping system acts as an additional one and is not installed on all types of shock absorbers.
Initial installation is for mountain bikes and sport bikes. For example, in downhill competitions, a cyclist is required to quickly drive a track strewn with stones, bumps and holes. Often you have to jump into the air to jump a high obstacle.
Conversely, shock absorbers are not fitted to road and road bikes as they are designed to be driven on tarmac and not suitable for cross-country riding. Although cyclists can sometimes set them up on their own to increase comfort when riding on uneven roads.
Self-assembly and repair of shock absorbers
The damping system requires periodic maintenance, and in case of deterioration in performance, inspection and repair. In either case, you will need to remove the fork from the bike. But, before proceeding with the description of this process (and it is, by the way, simple), we note some features of the service.
Oil and air plugs require special attention:
- Changing the oil in the cartridges after 4-5 thousand km of run.
- Cleaning, lubricating and checking oil seals for leaks after 100-150 km.
- Weekly check of cuffs on air forks.
- Examination of the external surface for chips and cracks.
The last point applies to conventional spring or elastomer suspension forks. Also, from time to time, you will need to change the polymer damper.
To remove and disassemble the fork, turn the bike upside down, dismantle the rim brake and remove the front wheel. Next, the steering stem and pipe are pulled out. After that, the support ring is carefully removed and the fork itself is removed. To remove the spring, you will need to unscrew the force adjustment bolts, and then remove the damper.
Using an ordinary screwdriver, remove the seals (anthers or oil seals), then pull out the entire shock absorber. The overhaul of parts consists in a thorough inspection, cleaning, lubrication and replacement of some elements. On average, fork disassembly should be done once a season. Installing the front shock absorber and fork on the bike is done in reverse order.
The rear shock absorber also requires periodic inspection. Standard maintenance consists of periodic lubrication and cleaning of components. It is recommended to use heavy high-temperature greases for the suspension. Clean the surface of the springs and damping element as necessary.
Long-term operation knocks down the travel distance of the shock absorbers, so it is necessary to periodically tighten the springs, adjust the compression and rebound speeds. To avoid a decrease in the spring’s sensitivity to shocks, it is recommended to adjust the settings in stages: first select the compression speed, check while driving, and then adjust the rebound speed.
Do not neglect the shock-absorbing system in a faulty condition. This will not only cause inconvenience when driving, but will also contribute to a deterioration in the bike’s running characteristics. there is a risk of bending the wheels or damaging the frame. Self-disassembly of suspensions should be carried out if there is confidence in their subsequent assembly. Otherwise, it will be better not to touch anything, but contact a specialist for repairs.
Methods for setting up a depreciation system
Shock absorbers can be adjusted in several ways:
- Spring Flexibility Setting.
- Changing the speed of compression and return of the spring to its original position.
- Travel blocking.
- Adjusting the travel distance of the bicycle fork spring.
Adjusting the stiffness and mobility of the shock absorber spring involves changing the resistance to external influences and the selection of the optimal characteristics. So, the stiffer the spring, the worse it resists impacts during movement. In a weakened state, the shock absorber will constantly “jump”, and on serious obstacles it can even break through.
The selection of the rebound and compression speed allows you to adjust the shock absorption system for specific travel conditions: mountain trail, forest road, complete off-road with stones and holes. Along with setting the speed, leveling of the stroke length of the bicycle shock absorber is also applied: this adds or removes a margin of distance within which the spring can move. This is done in order to reduce spring wear during long-term operation.
Blocking the stroke is “disabling” the softening ability. The spring is made rigid and incapable of deformation. It is advisable to use on smooth asphalt where there is no need to damp shocks.
In most cases, the systems are installed at the front of the bike and are referred to as a suspension fork. The name speaks for itself: the shock and vibration damping device is located in the part of the frame to which the front wheel is attached. There are several types of front shock absorbers:
- Rigid spring.
- Spring loaded with elastomeric damper.
The first type includes the simplest and cheapest devices. They consist of rigid metal springs embedded in the legs of a bicycle fork. The springs of such shock absorbers are not supplemented with a damper, which makes them ineffective when driving over rough terrain. But they are actively used on road bikes for comfort.
The elastomer springs include a rigid metal spring and a rubber damper located in the center of the fork tube. This type dampens vibrations much better than the previous one, and can be actively used when driving on small and medium bumps. A significant disadvantage of elastomeric shock absorbers is the low cold resistance of the rubber damping pin: with a decrease in temperature, the ability to damp vibrations is significantly reduced.
Air shock absorbers have high efficiency compared to spring-loaded ones. Air pumped into the fork is used as a shock absorber and vibration damper. Disadvantages: deterioration of the sealing properties of the cuffs and air permeability, as well as the high price of forks.
Oil shock absorbers are divided into two subgroups: oil-air and oil-spring. The “spring” on them are the air pumped into the bicycle fork and the steel spring, respectively. A cartridge filled with oil is used as a damper.
Another type of shock absorbers is also widespread. rear, which eliminates the residual force effects of the drive wheel. Most of the shock loads still fall on the front wheel, so rear damping systems are used as additional ones. They are similar in design to the front ones. A bike with two shocks is called two-suspension.
Bicycle Shock Absorbers: Varieties and Adjustments
The popularity of two-wheeled vehicles continues to grow steadily every year. New models appear and existing ones are improved. Bicycles began to be in great demand for use in specific conditions: riding without a road, rough terrain, jumping over obstacles. The design includes special elements. shock absorbers, which allow you to repeatedly operate the bike and not experience discomfort when moving.
Another cushioning option is a damping pin under the seat. Such devices can be installed as additions to an existing shock absorption system or to improve the comfort of cycling without shock absorbers. There are two types of seat posts: telescopic and parallelogram.
The telescopic pins are actually shock absorbers themselves. The seat tube contains an anti-shock damping system: an inner tube, in the cavity of which there is an elastic spring with a rubber damper. When hitting road irregularities, the shock absorber “walks” vertically inside the pipe, thereby damping vertical vibrations.
A significant disadvantage of a telescopic shock absorber includes:
- Increased friction during prolonged driving on uneven roads.
- Resistance to shocks and vibrations only along the axis of the pin.
- Settlement of springs and saddles.
All this prompted the invention of another type of seatpost shock. the parallelogram. The design of such a device is represented by the following elements:
- Seat tube.
- Articulated arms.
- Rubber damper that is placed between the levers.
On shock absorbers of this type, the seat is displaced in a smooth arc due to the compression of the elastomeric element. The travel of parallelogram pins is lower than that of telescopic pins, but they are more durable and resistant to small bumps.
Both types of shock absorbers require adjustment for the rider’s weight, which makes it possible for him to operate where necessary. Otherwise, the movement will be uncomfortable, in addition, the risk of damage to the frame increases.
Most often used on road bikes, but there they are gradually being replaced by other types of brakes. The name of the brakes speaks volumes about its design: the brake pads are pressed against the rim by curved levers that resemble pliers.
Adjusting the rim brakes
Adjustment of rim brakes (almost all modern ones are of the V-Brake type) is very simple and does not require any special conditions. over, due to the “openness” of the mechanism, maintenance usually consists not in working with the structure, but in replacing the pads.
Before adjusting, the first thing to do is to make sure that the rim brakes are indeed V-brakes. Actually, there are three types of rim mounts:
- V-Brake. separate V-shaped levers, connected by a cable, which is held by a leash (jacket);
- cantilever. with an additional central mount, from which the cable goes separately to each side. In fact, these are the predecessors of the V-Brake, featuring a more complex mechanism, but a large clearance, which is beneficial for “dirty” riding;
- caliper brakes. U-shaped mount in which two levers are connected and “bite” the rim. These models are the hardest to weaken.
V-brakes are applied in the same way as cantilever brakes. The brake cable is routed from the side to the top of the brake arm. The brake lever compresses both parts of the brake with cartridge brake pads. This system of parallel pressing of the pads allows for efficient braking.
In addition, the cartridge brake pads can be easily changed using a conventional hex wrench. At the moment, this type of brake is the most common. Since V-brakes are the most common type of rim brakes, it is worth considering their advantages and disadvantages separately.
- Simple and efficient design with good braking power.
- Lightweight compared to disc or drum brakes.
- Low price.
- Reduced braking performance if moisture or dirt gets on the rims and brake pads.
- Acceleration of the wear of the rim and brake pads due to increased friction when dirt, sand gets in.
- Wide tires cannot be used with V-brakes.
The drum brake (otherwise called “foot brake”) is located in the rear hub of the bicycle and has brake pads inside. The braking process is initiated when the carriage rotates against the movement.
As a result, the brake pads are pulled apart and pressed against the drum. Friction arises between the pads and the drum, due to which braking occurs. Drum brakes are commonly found on children’s bikes (e.g. Forward Meteor 12, Forward Timba girl) and inexpensive city bikes for adults.
- Durability. due to the closed mechanism, dirt, dust and moisture almost do not get into it.
- Drum brake does not cause wheel rim wear.
- Easy to maintain. no need for regular inspection and adjustment.
- Efficient. works even when the wheel rim is bent.
- Are heavy.
- force is required to brake than with other types of brakes.
- Cannot be used on multi-speed bikes.
- The presence of a “dead zone”. when it is impossible to brake with the vertical position of the connecting rods.
- There is a risk. if the chain falls off the sprocket and the front brake is not installed on the bike, the bike cannot be stopped.
- It takes time for the transition from moving forward to the beginning of braking, which in some cases can be critical.
Bicycle rear brake
Brakes for a bicycle, like for any other vehicle, are an indispensable element necessary to control the bicycle and ensure safety. The following types are distinguished:
- Drum brakes.
- Rim brakes.
- Disc brakes.
Which type of brakes should you choose? To answer this question, it is worth understanding the features of each type of brakes.
Bicycle brake problem symptoms
How do I know if my bike needs a brake adjustment? There are several signs:
- You bought a bike. new mechanisms require running-in and constant, in several approaches after a short run, adjustment.
- You have not used your bike for more than a month. especially if it was cold storage, maintenance of the pads and the brake mechanism is imperative.
- “New” sounds are heard from the mechanism: humming at speed, periodic knocks, whistles, squeaks. problems with mechanical parts or a block.
- The brakes began to react poorly to effort, that is, they only work after a certain stroke, do not immediately “release”, etc. a clear sign of problems with the cables or hydraulics.
- Visual damage to the cables or elements of the brake mechanism. they can continue to work, but it is simply necessary to adjust after, for example, an impact.
This is the most popular type of brake today. Their principle of operation is as follows: when a force is applied, which is transmitted through a cable to the brake levers, the brake pads on the brake levers fit tightly to the wheel rim, which ensures braking. Rim brakes are available in cantilever, caliper and V-brakes.
Why does a scooter need a shock absorber?
A scooter is perhaps the simplest and most ingenious means of transportation. A steering wheel, two wheels, a footboard, what else do you need to be happy? As time has shown, very, very much.
Today city scooters are very different from their distant ancestors and, not least, due to the number of “bells and whistles”. A folding frame, an ergonomic steering wheel, front brakes. modern models have a lot of options aimed at increasing driver comfort. Shock absorbers in this list are far from the last.
Why does a scooter need a shock absorber?
With the reasons that force manufacturers to put shock absorbers on their scooters, everything is clear: there is a shock absorber, which means that the user will shake less, and the ride will be more comfortable. And indeed: Have you seen our roads? Pothole in a pothole. On the tile, it can also shake quite noticeably, and what pleasure can be from the trip if the tooth does not fall on the tooth?
To solve such problems, shock absorbers are used. as a rule, these are spring mechanisms that allow the wheel to “walk” a little up and down and make the scooter move noticeably softer.
IMPORTANT: Dirt scooters. models with large inflatable wheels designed for riding on sand and earth. do not need shock absorbers, the wheels themselves quite effectively swallow irregularities. But this is generally a separate category of two-wheeled vehicles: SUVs.
How many shock absorbers should the scooter have??
Most manufacturers that produce scooters with a shock absorber limit themselves to one spring. it is placed on the front wheel. This approach allows you to remove unwanted vibrations from the front of the scooter, in particular from the steering wheel. Accordingly, it becomes easier to drive your vehicle.
Some scooters are equipped with two shock absorbers at once: both on the front wheel and on the rear. Such models, even on old tiles, go rather softly, providing complete comfort when moving.
Does an adult scooter need a shock absorber?
At first glance, this question looks strange: of course, you need it! Driving comfort is important. Unfortunately, this medal also has a downside: installing shock absorbers on a scooter creates a bunch of shortcomings.
First, the price rises. A scooter with a shock absorber. adult or child, it doesn’t matter. will always be more expensive than a similar model without springs. over, it is noticeably more expensive, the difference, as they say, is noticeable to the naked eye. Accordingly, it becomes more profitable to take a more modern and high-quality model for the same money as the older one, but with a shock absorber;
Secondly, reliability drops seriously. Price is not a very critical minus: if you have money, why not take it? But reducing the strength and reliability of a scooter is another matter. The principle is simple: the more moving units in the design of the scooter, the higher the risk that it will fail. And the shock absorber will surely break, sooner or later, and the more actively you use the scooter, the higher the chance of “early”.
And this is where the main approach manifests itself: on most scooters with shock absorbers, you cannot separately change the spring mechanism, it is built-in! That is, the shock absorber has broken? Goodbye to your scooter, it’s time to buy a new one. Some unscrupulous manufacturers profit from this.
Thirdly, a scooter with a shock absorber will weigh more and will no longer be so comfortable to carry with you.
Fourthly, any shock absorber absorbs some of the speed, reducing roll. which is why you will not find springs on any professional model. Have you chosen a city scooter with a shock absorber? Prepare right away that you won’t be able to drive it fast.
Plus, in most cases, the shock absorber is just a hoax! It is already clear from the text above that shock absorbers are usually installed on fairly cheap models, in an effort to make them both more expensive and more attractive to the buyer. Naturally, the company also chooses shock absorbers that are cheap, with a small stroke and a small resource. they practically do not make the ride smoother.
As a result, it turns out that, in fact, the shock absorber makes the scooter more expensive, reduces its resource and is not useful. The question arises: why is he needed at all then??
In addition, there are no such problems with the road on a scooter as on a car: you can always drive through yards or a park, along the sidewalk. where the asphalt is good. Accordingly, you simply do not need shock absorbers.
What it is?
For beginner cyclists, it is worth clarifying that a shock absorber is one of the components of any bicycle suspension. Shock absorbers are found in completely different types and models. Many well-known modern bicycle companies practice the use of these types:
- Spring loaded;
- With a stable and unstable platform.
But the principle on which it works and the general list of settings remains unchanged. What is the shock absorber responsible for in general, and the rear one in particular? This device is necessary in order to smooth out irregularities on the road, to make them softer, which means that the ride becomes smoother and more comfortable. Most importantly, the shock absorber is also responsible for your safety while riding. Many people are afraid to correctly and efficiently adjust the shock absorber. there are many settings, but we are not confident in ourselves and often leave everything as it is. This is a big misconception. If you adjust the shock absorbers correctly, you will have just the perfect bike.
How to adjust the rear shock on a bike?
A bicycle is a modern vehicle, which is also quite in demand. But every cyclist knows from his own experience that a bike is not just a beautiful accessory or a fashionable way of getting around. It requires special attention and care, just like our dear and beloved cars. You can’t ride a bike and don’t know anything about it. This can lead to a poor quality and uncomfortable ride, as well as reduce the lifespan of your pet. Therefore, you need to know more theory about your acquisition and be able to apply it in practice. Thus, you can always notice a breakdown and not lead to its aggravation. In addition, bicycles come to you with the factory settings, so to speak. And in order to ensure your riding comfort, the bike must be properly set up. You can argue for a long time about which part of the bike or its part is the most important. All of them are part of one whole and are responsible for the complex operation of the bike. But there are parts that are a little harder to tune than the rest, but they have a strong impact on the quality of your ride. This list also includes a rear shock absorber. What is it? Where is it located? What is it for and how is it set up??
Components of the structure
Note that the design includes a spring. It must be made of titanium or steel, and must not have changes in the thickness of the turns along its entire length. The spring has five characteristics:
- Recommended stroke;
- Inner and outer diameters.
These indicators will determine how long the spring will be. The higher the permissible rod stroke, the greater parameters in length the spring will have, the higher the level of its rigidity, its rigidity.
Each shock absorber has 2 parameters. the length along the axes and the stroke of the rod. They are written on the shock absorber itself as a combination of two numbers. The first number, like the second, is indicated in inches, and means the length of the shock absorber along the axes, and the second number, respectively, is the stroke. Both of these values play an important role. The point is that the frame is created according to the dimensions of the rear shock absorber. He must fit his bike perfectly so as not to disturb its geometry. If you make a mistake and install a larger or smaller shock absorber, this can lead to a sharpening of the fork angle, the bottom bracket gets higher or lower, the ride is not the same at all. And also in the most deplorable cases, such a mistake leads to a breakdown of the frame or even the shock absorber itself. Therefore, always buy the shock absorber for your bike that is recommended by the manufacturer or as close as possible to it.
You can always test the performance of your shock and see if it is set up correctly. There are three control factors for this:
- Preloading. This is the step that will show the resistance of the fork to your weight. If you weigh more than average. 60-70 kilograms, then you need to choose a shock absorber with a large indicator for preload;
- Recoil. At this point, you can watch the shock return to its normal position after you get off the bike;
- Compression. This is a more internal process. At the moment of compression, the shock absorber regulates the delivery of lubricant through small holes. This is essential for the performance of the entire suspension. The more effort you put in the compression process, the harder it will be for you to steer the bike. easy to steer. And this is no longer as safe as it seems at first glance.
Adjusting the shock absorber at the first stage is a rather difficult task, but quite real.
Most shock absorbers have a retaining ring in their design. It is thanks to him that the level of subsidence can be measured. If this is not the case, you can use a regular rubber band. So, you need to put the compression damping switch in the open position, remove the ring and sit on the bike. Try not to shake it. the shock absorber should be under the influence of a constant weight. Now look at how far the ring has moved. If it is at a level greater or less than a quarter of the total length, then you need to adjust the psi. To do this, set the level to 150 psi and get back on the bike. Your goal is to achieve 25% drawdown.
How to adjust the rear shock on a bike?
A bicycle is a modern vehicle, which is also quite in demand. But any cyclist knows very well from his own experience that a bike is not just a wonderful accessory or an actual method of transportation. It requires care and special attention, just like our expensive and beloved cars. It is forbidden to ride a bike and not know anything about it. This can lead to poor quality and uncomfortable driving, and reduce the life of your pet.
Based on this, you need to know more theory about your own acquisition and be able to apply it in practice. So, you can constantly notice a breakdown and not lead to its aggravation. In addition, bicycles come to you with factory settings. And to ensure your riding comfort, your bike needs to be set up correctly. It is possible to argue for a long time about which part of the bike or its detail is the most serious.
All of them are part of one whole and are responsible for the complex operation of the bike. But there are details that are a little harder to tune than the rest, but they just have a strong impact on the quality of your ride. This list also includes a rear shock absorber. What is it?
Where is it located? What is it for and how is it set up??
For beginner cyclists, it is worth explaining that a shock absorber is one of the components of any bicycle suspension. Shock absorbers are seen in full models and different types. Many recognizable modern bicycle companies practice the use of these types:
- Spring loaded;
- With a stable and unstable platform.
But the principle on which he works, and the non-specialized list of settings, remains unchanged. What is the shock absorber responsible for, and the rear one in particular? This device is needed to smooth out irregularities on the road, to make them softer, respectively, the ride is made smoother and more comfortable. But the most serious thing is that the shock absorber is also responsible for your safety during the ride.
Many fear it is true and how to adjust the shock absorber. there are a lot of settings, but we are not confident in ourselves and usually leave everything as it is. This is a huge delusion. If you adjust the shock absorbers correctly, you will have an easily perfect bike.
Note that the design includes a spring. It should be made of titanium alloy or steel, and not have any transformations in the thickness of the turns along its entire length. The spring has five features:
- Recommended stem movement;
- Inner and outer diameters.
How long the spring will be will depend on these indicators. The higher the permissible movement of the rod, the tremendous parameters in length the spring will have, the higher the level of its rigidity, its rigidity.
Any shock absorber has 2 parameters. the length along the axes and the movement of the rod. They are written on the shock absorber itself as a combination of two numbers. The first number, like the second, is indicated in inches, and indicates the length of the shock absorber along the axes, and the second number, respectively, the movement of the stem. Both of these values play an important role.
The point is that the frame is created according to the dimensions of the rear shock absorber. He must ideally fit his own bike, so as not to violate its geometry. If you make an inaccuracy and install a larger or smaller shock absorber, then this can lead to a sharpening of the fork angle, the carriage becomes higher or lower, the ride is not at all the same. And also in the most deplorable cases, such an inaccuracy leads to a breakdown of the frame or, in addition, the shock absorber itself.
Based on this, constantly purchase the shock absorber for your own bike that is recommended by the manufacturer or as close as possible to it.
You can constantly test the performance of your shock absorber and realize if it is correctly tuned. There are three control factors for this:
- Preloading. This is the stage that will demonstrate the resistance of the fork to your weight. If you weigh more than average. 60-70 kilograms, then you need to choose a shock absorber with a huge indicator for preload;
- Recoil. At this point, you get a glimpse of how the shock comes to its normal position after you get off the bike;
- Compression. This is a more internal process. At the moment of compression, the shock absorber regulates the delivery of lubricant through small holes. This is critical to the performance of the entire suspension. The more you apply compression during compression, the more difficult it will be to steer the bike. easy to steer. And this is no longer as safe as you think at first glance.
Adjusting the shock absorber at the initial stage is a rather difficult task, but fully real.
Better to start by measuring the percentage of drawdown. A good option is 25 percent. But in bicycles designed for downhill and high-speed riding, perhaps 30.
Most shock absorbers have a retaining ring in their own design. It is thanks to him that it is possible to measure the level of subsidence. If, in order not to be noted, you have the opportunity to use a simple rubber band. So, you need to put the compression damping switch in the open position, remove the ring and sit on the bike.
Try not to shake it. the shock absorber must be under the influence of a constant weight. Now look at how the ring has shifted at a great distance. If it is at a level greater or less than a quarter of the entire length, then you need to adjust the psi. To do this, set the level to 150 psi and sit back on the bike.
Your goal is to achieve 25% drawdown.
It is not known why this was the case, but in the everyday life of motorists there is such an understanding that the rack and the shock absorber are different parts. In general, it can be noted that the votes were distributed in a 50/50 proportion. Experienced auto repairmen claim that these are two different parts, giving a bunch of arguments in their favor. So, let’s first define what is a shock absorber in the classic automotive sense? In simple terms, this is an oil pump, where, during the vertical movement of the stem, liquid is poured in small volumes through holes specially provided for this. Taking into account the fact that the holes are made of a small diameter, this saves from the fact that the oil will immediately run out. Accordingly, slow movements are transmitted to the spring and to the suspension as a whole.
Remember this pattern, when the speed of the car increases, the shock absorber significantly increases the resistance, thereby the car does not swing on the road and the body holds more rigidly.
What is a rack? Often, it is understood as a full-fledged suspension assembly that connects the wheels and the body of the car. Structurally, the rack “contains” a shock absorber and a spring. Their main task is to maintain the weight of the car, even taking into account the load. Taking into account the generally reinforced configuration, a longer stem, the rack is ready to take even lateral overloads.
In general, some point out a few major differences between these two parts:
These are definitely different types of mounts, which is the main difference. Depending on the modification of the suspension, a support bearing can be used from above, in the event that the rack itself and a separate shock absorber must “turn” together with the “fist”. Bottom connection with the swivel “fist” of most shock absorbers is almost identical, using a metal clamp or two parallel welded plates to the strut.
In other modifications of the suspension, where the shock absorber is not directly connected to the “fist”, you can also find “dead” connections, with bushings “silent blocks”. Depending on the variety, rubber or polyurethane inserts.
Different loads. Take, for example, a shock absorber, the impact on it is applied only along the axis, as for the rack, then the loads are multidirectional.
There is an interesting pattern, the shock absorber may well serve as part of the rack, as in the domestic VAZ 2110 family or any other budget models. But, on the contrary, the strut is not able to replace the shock absorber.
The third difference is the ability to use the vehicle in the event of a malfunction. For example, with a broken rack, you will not be able to go far in principle. If a shock absorber is broken, sad but not critical, you still have a spring. Indeed, as a rule, in some suspensions there is a separation of the spring and the shock absorber.
In principle, if you look at it. this is the same thing, we can say that the rack is a type of shock absorber, in terms of the type of attachment and structure. After all, the main task, which both of them cope with, is to reduce the effect of loads on the suspension, from pits, potholes, “humps” and other “surprises” of domestic roads. And in general, they allow you to keep the bodies in the correct plane and horizontal, in relation to the wheels. Therefore, we will not further separate these two concepts.
Shock absorbers resource
We have disassembled the types and features of the device of this part, and a reasonable question arises, and what is the service life? It is impossible to give an unambiguous answer to this question, because the quality and durability of work largely depends on the conditions of use. This means the quality of the road surface, driving style, vehicle weight, loads, for what purposes it is used, and the like. On average, the manufacturer indicates a “mileage” of 80,000 km. But, you and I understand perfectly well that everything is not so smooth with the roads, and it is more and more difficult to find a quality part every year. In total, the term can be safely divided into two.
Types of shock absorbers
When buying and choosing a part, we always strive to find that element that will not only increase the handling of the machine, but also improve the comfort of movement. Finding a “sweet spot” can be extremely difficult, because adding stiffness for better handling, we proportionally reduce comfort. But, for a long time, the market has known such a concept as electrically controlled shock absorbers. This is just the case when the driver has not decided exactly what type of suspension suits him, he can adjust any stiffness in different conditions. But, remember that electrically controlled struts allow you to change the rigidity, but not the height of the body above the ground.
Therefore, the choice of racks should be carried out, focusing on your own driving preferences, as well as on the recommendations of the manufacturer of your car. To determine the type of shock absorber, you need to know its varieties, and there are only two of them, according to the type of fluid. So:
Oil-based. are considered the most successful for smooth roads. However, bumps and bumps are undesirable for them. The problem is that when driving over bumps, the stroke rate of the piston increases significantly, and much more heat energy accumulates, which leads to excessive overheating of the oil and a loss of operating efficiency. It is generally accepted that oil is most suitable for city driving.
Gas struts are much tougher, but the service life is often several times longer. They cool much faster and work efficiency is higher. But, it is worth remembering that the cost of gas struts is almost twice as high, it all depends on the manufacturer.
Gas-oil racks are the so-called combined type, where the positive sides of both are combined. Such shock absorbers maximally show their “abilities” on tracks with fine “ribbing”, for example, a coating of concrete slabs or gravel. Also, with such stands it is better to take turns. As for the cost, this type is the most expensive of the entire “family” of shock absorbers, of course we mean a certified product.
By the way, most of the car owners have no idea that before installing the rack, it must be “pumped”. If this is not done, the efficiency of the shock absorbers in this case will be at zero. To “pump”, you need to fix the element with the stem upward and press until the so-called “working” zone exceeds the dimensions of the “glass”. In this arrangement, it is necessary to hold out for about 2-3 minutes, then repeat several times. If after that there are no obvious failures, then the part can be safely put on the car.
Shock absorber device
Depending on the variety, the set of parts in the design may change, but not critical. Therefore, the list below can be considered complete. So:
The case, the part on which the mount is often placed.
Working substance, as found out only two types.
Shock absorber rod with protective cover.
Remember that there is no global difference even between the front and rear struts. The actors are the same. “Dumping” of the load occurs due to the movements of the piston on the rod along the cylinder itself, where the working substance is located.
Faults and how to identify them?
There is a whole group of rack problems that can lie in wait for every car owner. So:
Worn chrome plating (will destroy the seal).
The thread has been torn off. (Not a frequent occurrence, but nevertheless it is not uncommon that the attachment to the body “tears”).
You can easily identify the listed problems simply by carefully examining the part. Take a look at the counter, there may be oil streaks or drips. In this case, the work of the shock absorber is broken, and it is better to replace it, because it no longer brings any benefit. Can’t cope with rolls and debris.
There is a way that will allow you to identify the malfunction without getting under the car. So, it is necessary to swing (vertically) the car, from the side from which it is necessary. Please note that if, after swinging, the machine will make more than two vibrations before returning to its original position, then there are problems with the shock absorbers. Also a nuance, if during the swing of the car, it instantly stopped, then most likely the shock absorber is jammed.
In addition, it is possible to identify a malfunction by ear. If the rack makes a characteristic knock, then it is likely that mechanical damage has taken place. And it is best to conduct a complete diagnosis to pinpoint the cause.
The most effective way to check is a specialized stand on services, which allows you to determine the force of one or another shock absorber for compression and expansion.
Bicycle Rear Shock Repair
Probably, sooner or later, many cyclists have to deal with the repair of a rear shock absorber on a bicycle. Even if you service the bike in a timely manner and carefully monitor its condition, there is no escape from the natural wear of parts or the need to replace lubricants. If this is not done, soon it may not be necessary to repair, but to completely replace the rear shock absorption system. and this is a completely different cost.
If today almost all bicycles are equipped with a front shock absorption system, then the rear one is installed only on some of their types. Both the front and rear shock absorbers are quite complex devices, so it is better to contact the specialists in the bicycle workshop to troubleshoot these components.
Attempts to repair yourself often end up with the bike still having to be taken to the bike workshop, only in a much more deplorable state than before the intervention of the bike owner.
Do not risk your equipment, contact only reliable proven bike repair shops with qualified and experienced personnel. In such as the professional workshop VELO-BAZA on the street Borisovskie Prudy in Moscow.
Features of double suspensions in the repair of a rear shock absorber on a bicycle
Unlike the front shock absorber, which is now installed on the vast majority of models, not all have a rear shock. When driving on flat roads on city, highway or track models, it is simply not needed.
Full suspension bicycles are mainly equipment for off-road riding, mountains, difficult rough terrain. This is where the additional depreciation system comes in handy. It is needed not only to increase ride comfort, but also to damp vibrations when driving at high speed, to mitigate shock loads on the human body and the bike itself during descents and landings.
There are fewer types of rear shock absorbers than front ones, but this does not mean that repairing them becomes less difficult. For an inexperienced person who is faced with a bicycle repair for the first time, it is better not to risk their vehicle, but to contact a specialized bicycle workshop with professional equipment.
Considering the complex structure and harsh operating conditions, the repair of the rear shock absorber on a bicycle is required at least as often as the front one. Knocks, creaks, loosening of fasteners. all this indicates the occurrence of all sorts of troubles and can lead to even more serious consequences. Therefore, it is very important to carefully monitor your bike, undergo regular maintenance in a bicycle workshop and in case of problems immediately contact a specialist.
Adjustment and repair of a rear shock absorber on a bicycle at VELO-BAZA
Do not forget that after repairing the rear shock absorber on a bicycle, its adjustment is mandatory. Like the renovation itself, this is a fairly complex task that is not easy to handle on your own. Incorrect setting significantly reduces ride comfort, but increases the risk of both breakdown of the equipment itself and injury to its owner.
When adjusting after repairing a rear shock on a bicycle, there are several things to consider. It is necessary to correctly set the pre-compression. the level of spring resistance to the cyclist’s weight. The average optimal level of subsidence is considered to be an indicator of 25%, but in each case you need to focus on the cyclist himself. Correct execution of such an adjustment is a rather complicated manipulation. Without experience and alone, it is almost impossible to set everything right. In addition, do not forget about adjusting the damping element, if such a possibility is present.
The first-class VELO-BAZA equipment and our many years of experience in communicating with cycling equipment are an excellent guarantee that all work on the repair of the rear shock absorber on a bicycle will be carried out efficiently and on time.