What's the use of bicycle zipper?

I want to know what price you want.

Bicycles are divided into mountain roads and folded.

It depends on the road conditions you ride every day.

If I want to recommend a brand, I suggest buying giant bicycles, which have all kinds of bicycles.

Prices range from a few hundred to tens of thousands. After all, the brand is there, and it has a 1 year warranty. Accessories and the like are quite durable.

I rode a mountain bike that cost 5000 yuan to assemble.

Less than 10 kg.

The following is a small piece of information stored in my computer, which was pulled online before. I hope it helps you.

Choosing a bicycle mainly depends on the frame, parts and assembly technology. Only by combining these three factors scientifically can a good bicycle be considered.

First, the framework:

1. What is the framework?

The frame is equivalent to a human skeleton, and only with the frame can various bicycle parts be mounted. The frame is made of iron, aluminum alloy and other materials, and the angle formed according to the length of the pipe affects the characteristics of the whole bicycle. For example, bicycles that ride well in a straight line, bicycles that turn easily, bicycles that ride comfortably, and so on. Many of these factors come from the framework.

2. What is a good framework?

Lightweight, firmness and good elasticity are one of the goals pursued by the frame. In order to achieve this goal, it depends on the technology of various frame manufacturers. For example, whether the designed frame is designed according to the strength and characteristics of materials and whether the welding process is mature. These directly affect the appearance, strength and elasticity of the frame. More importantly, painting. A good picture frame, painted evenly, sprayed with 3-4 layers of paint. Don't underestimate spray painting. Good painting can make bicycles easy to maintain and not easy to rust. If the car is loaded with a frame that does not meet the above requirements, it is possible to produce bicycles that cannot ride in a straight line or have difficulty turning, or bicycles that will be retired soon.

3. What material is the frame made of?

Iron frame is the most common, but iron frame is also divided into chromium-molybdenum steel, high-strength steel, ordinary steel and so on. After adding these other components, it can be made into, for example, thinner pipes, making the whole frame lighter. Recently, on the basis of not reducing the strength, a frame made of materials other than iron such as aluminum alloy has appeared. There is a frame made of titanium carbon fiber in cycling competition.

Second, the parts composition

1. What are bicycle parts?

Various parts installed on the frame have their own functions. For example, braking is to stop the bicycle safely; Pedals transmit power to wheels, etc. The professional factories that produce and sell these parts are called bicycle parts manufacturers. Famous parts manufacturers develop new products every year, provide them to major bicycle manufacturers, and then appear in the market.

2. What is the best part of a bicycle?

Simply put, it is light and strong, with good performance. Because of these conditions, cycling is easy, safe and convenient. But to achieve all the above conditions, we need good materials. Therefore, bicycle parts are often a specific factor that affects bicycle prices. It is best to be able to participate in the Olympic cycling competition. The best materials are used in strength, performance and weight.

Third, assembly technology.

1. assembly technology

A good part is not assembled properly, just like a house that has not been carefully designed by an architect and built by an experienced craftsman, it will make you nervous all day for fear of collapse. Therefore, if you don't want to regret it after buying it, you must understand this knowledge.

2. Comfort function of bicycle

A. transmission?

Many people mistakenly think that bicycles are equipped with transmissions to speed up riding, but in fact, the maximum power that people can emit is only 0.4 horsepower. The transmission is just a tool to help people play this maximum horsepower easily.

B. what are the benefits of transmission?

Bicycles are generally used in cities, but there are actually many slopes in cities. For example, sometimes riding a bicycle will make you feel that your feet suddenly become heavy, and there are often many slopes that you can't judge with your eyes. At this time, the role of the transmission can be fully reflected. If you have a transmission, you can ride easily as long as you can change to a lighter gear. Of course, it can also be used against the wind

The advantage of transmission is that it can help you effectively reduce physical consumption in the case of poor physical strength. For example, when you have a cold, don't consume too much energy, so it will be easier to choose a lighter number of teeth when riding a bike than when riding. There are also women who are in poor health, students who are tired of exams, and elderly people who can use variable-speed bicycles flexibly. So the benefits of the gearbox are really too much.

C the previous transmission system needed fine tuning (now some transmission vehicles need fine tuning), but with the development of SIS (shimano index)

With the successful development of system functions, many bicycles are equipped with SIS system. When shifting gears, just press the shift handle and complete the shift with a click, without worrying about how to operate.

D. I don't know what gear I am in when I ride.

At present, there is a digital display on the gear shift lever. Just look at the digital display. The latest product is a computer LCD display for flight.

Deck electronic display system. The display system can also display 17 functions, such as time, average speed, total riding distance, etc.

E. internal speed change and external speed change

Before understanding them, it is necessary to understand the concepts of inward transmission and outward transmission. Simply put, the external transmission means that the transmission is installed outside the bicycle as a separate part, while the internal transmission means the built-in part hidden in the rear hub.

The external speed change is directly presented to the outside and directly contacts the external space. The internal transmission is hidden inside and does not directly contact the external space. This external transformer is mostly used for mountain bikes because of its large design space and large speed range. However, due to contact with external rain, dust, oil pollution, etc. , must be cleaned and maintained regularly, and the internal transmission does not need regular maintenance. However, due to the limited design space and variable speed range, there are also many light vehicles commonly used for urban cycling.

F. why is it not popular now?

In the domestic market, because consumers have not realized the charm of inward transmission, it is not common at this stage, but it is very common in Japan and developed countries in western Europe (50% of bicycles in Japan are inward transmission). Of course, the reason is that there is no need for maintenance. The latest new product also has a fully automatic internal transmission system, which can automatically change speed through computer induction and micro-motor.

G. the brake is an important part.

The quality of the brakes is related to the safety of you and others. Braking force and braking time are the main factors that determine braking quality, so it is very important to have good braking performance and light operating force. There is a common drum brake in the Japanese market, which can get satisfactory results as usual in rainy days, without noise and maintenance.

What kind of bike suits you best?

First of all, it depends on the purpose of riding. Generally, you can use a light car for work, school and shopping, preferably a relatively large basket, where you can put your schoolbag or something. You can also buy a car with internal transmission or a bicycle with external transmission if you have the conditions.

Cycling on a slope or bridge, if you find it troublesome to climb the slope and get on the bridge, don't choose a bicycle with a transmission.

If the road you ride is uneven and there is no paved road, you should choose wider tires and bicycles with transmissions.

If you ride a long distance a day, choose a bicycle with a transmission and narrow tires. If it's a short trip, you should choose a light car.

If it often rains where you are, you should choose a bicycle with fenders. If you have more opportunities to ride a bike at night, you should choose a bike with lights and the like.

There are many kinds of bicycles with different appearances and colors in the bicycle shop. Therefore, before you go to the bicycle shop, you'd better make sure that they are in line with your actual situation.

Determine what kind of bike you need, and then go to the bike shop to buy it.

[This post was last edited by Huaihe people at 20: 39 on June 4, 2007]

Post 165 essence 1 score 165 reading permission 15 view details at the top.

Yu people in Huaihe river basin

Whispering song

Send text messages as friends. It is currently offline. Published on June 3, 2007 1 1: 3 1, depending on the author.

Buy mountain bikes

How to choose a suitable mountain bike

Before you want a mountain bike, there are several factors you must consider. What kind of mountain bike do you want to play? What is the approximate budget? Do you want to be a professional player? Or just think of it as an amateur fitness activity?

? Here we will introduce you one by one, so that you can understand the different structures and characteristics of various mountain bikes.

. According to your own budget, choose the cross-country mountain bike that best suits your needs. Under all the conditions, the most important thing to buy a mountain bike is to know whether the frame size is suitable for you. Buying a bicycle that doesn't fit is like buying a pair of shoes that don't fit. It's very inconvenient. Here are three pictures that can clearly tell you how to test whether the bicycle meets your needs.

You can lift the faucet and seat cushion to see if they are waist-high.

When the pedal is pressed to the bottom, the thighs and calves must be almost straight.

When you stand on the upper tube, the height from the upper tube to your pants should be at least 8cm.

Before introducing all kinds of mountain bikes with different functions, let's talk about the budget of buying a car. For ordinary beginners, we suggest you buy it.

Buy a complete, standard mountain bike without shock absorber and steel frame body. The reason is that this kind of car with steel frame body is a mountain bike that knights have been using before the invention of shock absorber. Without front and rear shock absorption and expensive metal body, the car itself is much more expensive. With a real price, buy a solid body, you can run different roads, and there are not many opportunities for parts to go wrong. At the same time, you should pay attention to that your car is best equipped with metal pedals, or better yet, it can be replaced with clip-on pedals.

Another way to save money is to buy second-hand mountain bikes. The only drawback of this method is that

The point is, just like buying a used car, you will probably buy a problem car with the same size in the future, because you don't know the past history and situation of this used car. Before buying a used car, be sure to find someone who knows the car to check it for you. Generally speaking, the problems of used cars, such as the frame itself, are easy to see if they are traumatized. My advice to you is that you'd better buy a mountain bike that has only been used for one or two years and only runs on ordinary roads. Another test method is to look at the maintenance condition of the seller's existing car.

General mountain bike

If you are looking for a mountain bike that you can ride on ordinary roads, then this cross-country bike

Is your best choice. The biggest feature of this mountain bike is that it has excellent front fork shock absorber and high-quality steel, aluminum alloy or carbon fiber body. In fact, this mountain bike has many characteristics that knights are eager for.

This kind of car is usually durable, and it won't cause you any trouble in maintenance after years of use. Riding a mountain bike generally doesn't care much about the weight of the bike itself, so the body structure is very strong. But that doesn't mean it can't be lightweight. Ultra-light steel or aluminum body can make the whole car lighter, but generally speaking, unless it is a mountaineering car for competition, the weight of the body itself is not very important.

Fully damped mountain bike

At first, the purpose of installing the shock absorption system on the mountaineering car was mainly to deal with the collision in the downhill race, but today, if you can have a reliable, light and very comfortable mountaineering car, it is worthwhile, even if it is not for the downhill race. The latest mountain bikes are made according to solid and comfortable conditions. You can ride for a whole day without feeling very tired, so the mountain bike with full shock absorption is the most comfortable mountain bike. Today, fully damped mountain bikes are not limited to downhill races. The identification method is that if this mountaineering vehicle is specially used for downhill race, except for full damping, all its components are specially designed to adapt to the strong collision during downhill race, so its weight will be about 65,438+00 pounds (4-5kg) heavier than that of the general fully damped mountaineering vehicle for off-road. On the premise of seeking comfort, you will choose a fully shock-absorbing mountain bike to participate in any kind of activities.

But one thing you must remember is that your mountain bike is much heavier than other bicycles without shock absorbers because it has shock absorbers, so you don't need to bring unnecessary equipment or tools to increase the load when riding.

Here, the cross-country mountaineering bicycles that professional athletes ride are different from the inventory or high-end bicycles we see in the store. In order to win, professional athletes will choose lightweight and get more efficient equipment. To this end, they often have to endure a lot of discomfort, such as narrow tires and hard cushions, which are all sacrifices they make in order to get faster speed. In the design of cross-country mountaineering vehicles, the faster the uphill is, the better, and we don't care much about the special situation of downhill or uneven road surface. Professional mountain bikes are quite light, sometimes less than 23 pounds (10.5kg) including the front shock absorber.

For a long time, mountain bikes used by mountain bike enthusiasts in downhill races are the same as those used in cross-country races, except that the front fork is equipped with shock absorbers, which is far away. However, today, almost all downhill riders choose mountain bikes with complete shock absorption, whose shock absorber can stretch at least 6 inches, and its weight is 65,438+00 to 65,438+05 pounds (20-30 kilograms) more than that of ordinary off-road mountain bikes. The body used in downhill race must be strong, because the impact force will be transferred from the front fork to the frame, which is unbearable for ordinary mountain bikes and may even cause the frame to break. Under this premise, the weight is not the main consideration of downhill mountaineering vehicles, but the firmness is important.

There is a special mountain bike, which is mainly used to jump over various obstacles, unlike mountain bikes riding on ordinary mountain roads. The characteristics of this mountain bike

It was designed by its experts for jumping, jumping, twisting and crawling. This stunt car is used to jump over various obstacles such as wood blocks, stones, long tables and even cars. The difference between this mountain bike and the general off-road vehicle is that the body is very low, and the rider has enough space to twist on the car.

Multipurpose mountain bike

This kind of mountain bike is designed for people who like mountain bike activities and often ride bicycles between the city and the mountain road. Although it is not necessary to have a particularly strong body like a mountain bike, it must meet the requirements of durability. The paint of the car body must be good, and it can resist scratching, cutting, rubbing and bumping in the city. Because to adapt to the urban road surface, it may be necessary to add luggage racks and fenders. Its body is mostly made of steel, and aluminum alloy is also useful, but it is still made of steel.

Tourist mountain bike

Mountain bike is really an ideal travel companion. Many people like to ride their mountain bikes in foreign scenic spots when traveling, and some even have little riding experience. Anyway, before you decide to make cycling a part of your trip, you must pay attention to some things.

The first thing to pay attention to is the choice of body material, because the only material that can be repaired by welding is steel, no matter when traveling around the world, so the steel body is the most suitable for mountain bikes.

Rugged components are one of the necessary conditions, and light components are not suitable for installing suitcases, backpacks or travel goods. What's more, in the case of traveling, the riding time and distance are usually long, and endurance is the most important.

Another important preparation before traveling is to carefully check the rim assembly. If there is no way to make a new wheelset, you must take the whole mountain bike to a good garage for inspection and renovation, check the flywheel again, and put on new outer tires and inner tubes, so as not to suffer from anchoring in a foreign country.

You should choose a comfortable cushion that suits you very well. It's best to try riding for a while before going out. Don't try on the trip. If it doesn't fit, there is no chance to change it. In short, you should consider riding in the car for a long time. The comfort of the seat cushion is very important.

The material of the luggage rack should be strong. Cheap aluminum products sometimes bend easily. If it is worth the money, the higher-priced rack will be stronger.

Post 165 essence 1 score 165 reading permission 15 view details at the top.

Yu people in Huaihe river basin

Whispering song

Send text messages as friends. Currently offline. Published on June 3, 2007 1 1: 37. It depends on the author.

Mountain biking skills

design

The frame is made of steel, aluminum, titanium alloy and carbon fiber. Among them, steel frame is the cheapest, but it is also the heaviest. After the paint on the surface falls off, there is a danger of rust, so we should work hard on maintenance at ordinary times. The most advanced point is aluminum alloy, which is lighter in weight, but needs a thicker pipe diameter to achieve the same strength as steel pipe, and is adopted by most mountaineering vehicles. After surface polishing, the whole car is silvery white and looks good. The characteristic of carbon fiber frame is that it can be integrally formed without welding, but each frame needs special mold manufacturing, which is costly. Titanium alloy is not only light in weight, rust-free, high in strength and best in material properties, but also expensive in raw materials and difficult to process.

Seat washer

The height of the seat cushion has a great influence on the riding comfort. The calculation method is that people sit on the seat cushion and step on the pedal farthest from their bodies. At this time, after the feet are straight, the heel should be able to step on the pedal and pay attention to the heel. If you can't step on the heel, it means that the cushion is too high and the knees are not straight, which means that it is too low. One thing to note is that the height of this cushion is much higher than the height that most people are used to riding. When parking, you even have to reach the ground with one foot pad and toe. You will not be used to riding at first, so be careful where there are many cars and traffic lights in the city. However, for long-distance riding, this height allows your legs to provide the best strength on the pedal. So if your bike only rides a few hundred meters. For the sake of safety, don't lift the seat cushion to the highest position.

speed change

Ordinary people ride a gearbox, so it is wrong to adjust the transmission ratio to light if they want to ride slowly, and to heavy if they want to ride quickly. The correct way is to keep a certain pedaling speed, which is generally 1 90 rpm. When riding at this steady speed, if you find that your feet are a little tired and you can't pedal so fast, change to a lighter transmission ratio, and vice versa, so that your legs can always maintain the same strength. This is the correct operation method of the variable speed system. Therefore, 2 1 24, or even the latest 27-speed shift, does not provide a larger shift range, but provides a finer shift within the same range to keep the pedaling speed stable.

ox’s horn

Horn refers to the handlebar mounted at both ends of the handlebar, or attached to the handlebar. In addition to shifting gears, its main function is to provide different grip methods for wrists, reduce fatigue and protect hands. Generally, the handlebar is horizontal left and right, and it is similar to a single lever when grasping; The front and rear angles are equal, and the arm posture is similar to driving when grasping. When going uphill, it is easier to exert force by holding the horn with both hands. When going downhill, because the horn steering control is not good, you can't pull the brakes, so it is safer to hold the original handlebar. The installation angle of the horn varies from person to person. Usually adjust it to be perpendicular to the arm first, and then adjust it downward, so that the wrist can grasp it in the most natural state.

Post 165 essence 1 score 165 reading permission 15 view details at the top.

Yu people in Huaihe river basin

Whispering song

Send text messages as friends. Currently offline, published on June 3, 2007 1 1: 38, depending on the author.

Save a bike by yourself.

If you really want to join the car group, you might as well "save" a bike yourself.

When choosing accessories, you need to consider the following factors: the bicycle project you are interested in, your physical condition, the functions you need, the firmness, and of course your financial strength.

Just as computer players can save computers, car players have an "ideal preparation" plan: the frame and rims should be strong. Sports cars are different from ordinary bicycles, and its outstanding requirement is to be strong. The frame must be able to withstand great pressure, impact and vibration without breaking or deformation. The rim must be double-layered, so that the inner tube will not be damaged during exercise. It should be noted that belts should be purchased in pairs (the patterns of the front and rear belts are different, which is the need for different front and rear forces in sports). The performance of the suite is better. "Good performance" is a very common sentence, and everyone who plays with cars will bring it out from time to time. In fact, this is a very vague term, which can represent multiple meanings such as firmness, comfort and lightness. In their words, "it feels good." If you can, try to choose high-grade kits. A set of Japanese-made ShimanoXTR97 kit includes: front and rear wheel shafts, flywheels, toothed plates, front and rear brakes, front and rear zippers, central shafts, brake handles, conduits, chains, etc. It is a relatively high-grade accessory at present, and the price is naturally high. Seats and handlebars should be comfortable.

Bicycle accessories are not as important as big ones, but they can't be ignored. The shape and hardness of the handle cover and the seat should be appropriate, so that you won't feel tired after a long exercise. Although there are so many parts in a whole set of bicycles, their combined weight is only 20 kilograms. The road race is much lighter, only about 14 Jin, so you won't feel very tired when you move upstairs every day.

The cost of assembling a sports bike ranges from several thousand yuan to tens of thousands of yuan. For safety, don't buy a "mountain bike" of several hundred yuan on the street. Those cars will have a good time in a flat city. If you ride to the outer suburbs, you will suffer from bumps.

If you really want to join the car group, you might as well "save" a bike yourself.

Many players will assemble bicycles by themselves, because it is cheaper than buying a whole car, and they can also configure parts according to their own preferences.

In addition to parts, the most important thing in loading is a complete set of tools. Hexagon wrenches, wrenches, screwdrivers, wire cutters ... Special tools need at least one connector.

When the parts and tools are finished, you can start loading. Install the intermediate shaft where you bought it first, because the installation requires special tools, and it is useless to buy this tool when you go home. Beginners had better go to the garage to adjust the wheels.

1. Install the front of the car with five parts. Hit the upper and lower cups on the frame with wooden mats. It doesn't matter if you use some violence here, because the framework is very strong. Similarly, the front fork can be installed on the frame by hitting the wave crest on the front fork and smearing the wave ring diagram. Remember, never reverse the direction of the wave ring. Put the rear wheel on the car so that the car can stand firm.

2. Install the front of the car. Clip the stem to the upper end of the front fork, not too tightly, because there are five pieces to tighten at the back. Clamp the handle horizontally on the handle post, then put the handbrake and lever, dip it in some water and cover it. Pay attention to not too much water.

3. Install the transmission. First, install the toothed disc and tighten the screws. Install the front transmission and rear transmission, and pay attention to the position of the front transmission. Bring the chain, too. Remember that the chain must go through completely, and then change the speed. Put the transmission line on the wave rod, dip a little butter in it, cut off a suitable length of wire sleeve and put it on, and tighten the transmission line to the transmission.

4. Adjust the brake. Install the front wheel and front and rear brakes, and apply some butter to the frame brake seat.

5. Adjust the speed. Install the front and rear wheels, first adjust the low positioning of the rear shift, then change the line after tightening, and then adjust the gear when riding.

Sports bicycles have a certain intensity to play with, so it is essential to match clothes. Mainly includes:

Helmet: made of high-strength plastic, lined with compressed foam plastic and with cooling holes. If you fall down while riding a bike, you can protect your head from serious injury.

Cycling clothes: tight-fitting, made of special materials. It can ensure that the speed will not be affected by the wind when riding fast, especially to prevent the inner thigh from being scratched.

Bicycle shoes: A small groove is made in the sole to match the small groove of the pedal on the car. When riding fast, the foot is attached to the small groove of the pedal, and when riding fast, the foot is not separated from the pedal, which is convenient for exertion.

Cycling gloves: mainly play an anti-slip role. But I want to remind you that the only disadvantage of riding is that the opponent has some injuries.

The above content was pulled online, and I don't know the source. So the reference material has no address, sorry.

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