Bicycle for dying: basic characteristics, rules of choice

Since its inception and to this day, the bicycle has experienced many changes. At first it had a primitive design, and now there are models that you can not call otherwise than a miracle of engineering thought. For a long time the device of the bicycle was unchanged. And they went by this transport only on level roads. But in 1970, invented a mountain bike (mountain bike), and this was a real revolution in bicycle construction. On a mountain bike you can develop a terrain that was previously inaccessible to cyclists. Over time, various disciplines related to mountain biking appeared in cycling. Today, great popularity has found dart jumping and street trial. Let's find out what a bicycle should be so that you can practice these sports on it.

General concepts

Dirt jumping is literally translated as "jumps in the mud." In principle, so it is. Cycling is carried out on a specially prepared track, which consists of ground jumps. Rapid ups, touching landings, dizzying flights - that's what awaits the audience on the track for dert. Well, in the street trial for tricks are used not earth mountains, but elements of the urban terrain. Both sports require excellent bike ownership (this is the name of not only a motorcycle, but also a bicycle). Disciplines are similar in terms of the level of load on transport, but there are some differences.

Bicycle for darts and strits: key features

For jumping, modified mountain bikes and BMX are used. Or something in between these two kinds. As a rule, they weigh a lot and have one brake - the rear.

A bicycle for jumping always has only one gear. Nevertheless, many manufacturers position multi-speed bikes as derrick or street. Such models should be excluded from the list of options considered when choosing a bike. If the bicycle has several gears, the manufacturer, most likely, has saved on the quality of the frame and other important components. In addition, in these disciplines, gear changes are completely useless. It only increases the weight of two-wheeled vehicles and its cost.

For a beginner, a bicycle for a dert is commercially available. Such models are also called "compliments". And more experienced athletes and those who are well versed in the details and specificity of their work, collect their bikes themselves from the most suitable for them elements, or tuning their compliments. We discuss the most important elements of the bike separately.

Frame

This is the most important and expensive part of any bicycle. The main characteristics of the frame are its geometry and material of manufacture. It depends on them the quality of the frame and its suitability in this or that kind of sport.

A bicycle for derrick or straight should be resistant to extreme loads. Therefore, the strength of the frame is in the first place. In their manufacture, the following materials are used:

1. Hi-Ten - high quality steel. It is usually used in the manufacture of inexpensive compliments. The frame made of this material has an impressive weight, but does not have sufficient strength. Therefore, the tuning of such a bike begins with it.

2. Alloys of aluminum. The frame made of this material weighs less and practically does not undergo corrosion. However, it can not fully extinguish the blows and is poorly repaired. Over time, with active use, aluminum accumulates fatigue. Sooner or later it leads to the destruction of the frame. However, among fans of bicycle jumping there are many fans of aluminum frames.

3. Alloyed steel. Chromomolybdenum alloys are used in such frames. The product of this material well extinguishes the energy that occurs when landing, and softens the impact. In frames of alloyed steel of medium and expensive grade, pipes with a non-uniform wall thickness are often used. This allows you to increase strength and reduce weight.

4. Magnesium and titanium alloys, as well as composites - the most high-quality materials for frames. However, as a rule, only professionals can afford them.

Thus, we can conclude that the best bikes for darts and strits are those whose frame is made of alloy steel. It provides an optimal balance of weight and strength. Aluminum also has a lot of fans, but it is more suitable for disciplines in which there are no ultra-high loads and no strikes.

Frame geometry

A special attention deserves such a moment as the geometry of the frame. Just here, and the main difference between a dart-bike and a street-bike is shown. Unlike other disciplines, a summer-dress does not play a special role here. The length of the upper pipe comes to the fore.

The bicycle for dert is relatively large in size. The front triangle of the frame usually has a length of 570-590 mm. The posterior triangle is also quite long - 370-410 mm. Smooth landing provides a specific angle of inclination of the steering column - 68-70 degrees. In street trial, this design would increase the duration of the flight, but would make it difficult to "pull" the bicycle. Street-bike, on the contrary, has the shortest front (about 545 mm) and rear (345-350 mm) triangles. And the inclination of a steering column here makes 71-74 degrees.

The lower feathers in the derrick are parallel to the ground or have a negative inclination angle. Thus, the carriage is either flush with the rear axle, or slightly below it. This design allows you to lower the center of gravity of the bike, which has a positive effect on the dynamics of acceleration and makes the flight more stable. In addition, the bicycle for derrick jumping due to this geometry of the frame is better controlled on the track with dynamic turns.

The street-bike carriage is located higher, which makes it easier to "pull" the bike and install it on the rear axle of the peg. Do not increase the height of the carriage too much. This will make the bike unsuitable for flights and lead to a loss of stability. Typically, bikes for dert and street use horizontal dropouts, which make it possible to change the length of the wheelbase.

Wheels

Another point that often provokes controversy is the choice of wheels. Bicycles for derrick and straight, as a rule, put wheels with a diameter of 24 or 26 inches. The 24-inch bike is more versatile. It can be suitable for both disciplines. By the way, sometimes two different wheels are put on the dart-bike: 26-inch forward, and 24-inch back. In general, the last variant is more suitable for dert. Such wheels better handle an uneven surface and soften the landing.

Bicycle Street, on the contrary, behaves better with 24-inch wheels. They are easier to do tricks, because they are easier and less. The bike on small wheels is much more compact. It is easily pulled out and more responsive to the steering movements.

The choice of diameter also depends on the growth of the athlete. If you are above 180 cm, feel free to buy a bike with wheels 26 inches in diameter. Well, if lower - with 24. In dert use rubber with a developed protector or half-hair. And in the street - slicks or half-raisins. A bicycle for jumping must have wheels with double rims.

Fork

Another important element of the bicycle. Street bike, as well as dert, usually bothers newcomers who do not have sports ambitions, somewhere in six months. In this short time, the rider's joints can be severely damaged if he incorrectly selects a fork.

These elements are of two types: rigid and amortization (short-stroke). A soft fork with a stroke of up to 13 cm is suitable for fans of aggressive style with long flights and landing on flat surfaces, as well as for beginners. But such a product is quite expensive. On the compliments for beginners usually are the cheapest shock absorbers with one crown.

On a street-bike, which is used for low jumps, it is better to install a light hard fork. It will maximize the amplitude of departure and better control the bike. Another plus of this solution is significant savings. It is important that such a plug is made of a chromomolybdenum alloy or hiinet.

The standard products are the axle 14-20 mm. They are strong enough and reliable. Do not put a 10 mm fork on the bicycle for jumping - it will quickly fail.

Steering wheel and outrigger

The size of the rudder depends on the width of the shoulders and the physical training of the athlete. For large riders, a wheel with a width of 700 mm or more is suitable. Well, the average person will have enough width of 680 mm.

On the bikes with a rigid fork set chrome wheel, and if the plug is soft, fit and aluminum. The height depends on personal preferences, but, as a rule, the hard forks put the rudders higher than the soft ones.

For a jumping bike, a short take-off with a length of 35-50 mm is ideal. This bike is perfectly controlled, as the hands are close to the center of gravity. Riders of large physique can put a take-out is more authentic.

Brakes

The type of brakes, in principle, is not important. Another important thing is whether they are on the bike or not. Some athletes go without any brakes, but beginners should not rush to remove this knot. At the right time, it can protect you from serious injuries. Bike Street or darts can be equipped with even simple vibrake brakes, but it is better to install discs after all.

Saddle

Everything is simple: the saddle should be wide and soft. Narrow does not work to pinch your legs when jumping. A hard will beat on your knees, delivering discomfort.

Protection

Before you begin to engage in extreme cycling, be sure to get protection. First you need to choose a helmet. You can take the so-called full-face, but it weighs a lot, greatly hovers and hinders the survey. Therefore, to begin with, it is better to buy a simple helmet-bowler.

Next, you need to take care of protective brushes for knee and elbow joints, as well as shins. And do not forget to buy gloves.

Bicycles for a street / dart: price

These sports have become quite widespread, which means that the market has a large selection of bicycles, spare parts and uniforms. The price of bicycles for hopping sports varies depending on the quality and completeness of the parts. A bike for a beginner costs from 300 to 1000 dollars. In general, as you probably understand, there is no limit to perfection.

Conclusion

Choosing a bicycle (straight or pull you like - it's not important), you will come across a lot of nuances. Understanding the need for this or that little thing will come with experience. There are also such questions, which have been arguing among riders for many years. An important role is played by the personal preferences of the athlete. Having started skating and plunging into the atmosphere of extreme, you will quickly get acquainted with all the nuances of this fascinating activity. And do not forget that the path to experience lies only through regular training.