Инновационные технологии постепенно превращают two-wheeled transport in the perfect vehicle. This is confirmed by a bicycle for downhill. He allows to ride at his own pleasure and at the same time perform dizzying stunts on descents from mountain peaks.
To get full satisfaction from the practice of extreme sports, you need to understand how to choose a bike for downhill. Let's try to sort out this issue.
Briefly about downhill
Downhill - cycling sports discipline,the main essence of which consists in speeding overcoming difficult areas of mountainous and rough terrain. Often the tracks are overfilled with congested areas, slippery soil, scattered logs, contain slopes with a slope of about 45about.
For the development of discipline at the beginning of the centuryreputable manufacturers have taken up the development of special prototype bikes that feature a high fork with improved cushioning capabilities and a modified rear suspension.
Frame
Just how reliable, convenient and effective a downhill bike will be during a ride depends largely on the material used to make the frame. Consider the most common solutions.
- Алюминий – для изготовления велосипедов данной The category uses several alloys of the material. In the frames of the popular sixth series, magnesium is used as an additional component, which contributes to an increase in strength and weight reduction of the structure. In the last at the moment - the seventh series, zinc is used, which reduces the overall cost of the bike.
- Steel - in the production of modern modelsthe material is practically not used, because, despite the margin of safety, has a large weight. But if you choose a bike for the downhill of the old model range, such frames can still be found.
- Карбон – дорогостоящий материал.However, the overpayment here is rather arbitrary, since such a solution allows us not to worry about the stability of the frame to mechanical damage. Yes, and the weight of the structure will be much lower compared with the same aluminum.
- Chromole - In the past, assembling a bicycle forDownhill occurred precisely on the basis of such material, the main advantage of which is the absence of the effect of metal fatigue during friction and bending. In other words - even when cracks appear in the joints of individual parts, they can be easily removed by welding without reducing the initial strength of the structure.
Suspension
Bicycle for downhill - vehicle,which is characterized by the development of a speed of about 60 km / h and the implementation of jumps from steep heights. In order for the bike to withstand such loads, special suspension systems are provided for in the design.
One of the most common favorsfour-lever suspension, which allows the wheel to move only up, not moving towards the saddle. As for the popular single-lever systems, the latter provide the perfect passage of uneven areas. In this case, the effect of rocking the bike when pedaling is much reduced.
Fork
The second after the frame of the obligatory componentDownhill-bike stands double-sided suspension fork. Such solutions are used in the assembly of motorcycles and can increase the torsional rigidity.
Wheels
Under the bike for downhill steady, weighty wheels are selected. Indicators of resistance to stress depend here on the correct choice of the spokes, as well as on the correct assembly.
Specific recommendations on the choice of wheels to givecomplicated. Much depends on the style of riding, the nature of the terrain, on which the movement will be carried out. In most cases, it is enough to give preference to the wheels of reputable manufacturers.
Brakes
The best bikes for downhill containexpensive, high-quality brake systems. It is imperative that they create significant effort. Here to choose between four-piston and double-piston models. Preference is recommended to give a more perfect and reliable first option.
Gear Switches
In urban and mountain bike models activelyBoth rear and front derailleur are used. In a tight discipline, downhill rely mainly on the back, because on the rapid descents there is no need to change the values in a wide range.
Among the available systems that are highly reliable, it is worth noting switches Sram X7 and Sram X9. The choice of such options due to stable operation and affordable cost.
Finally
Перед покупкой велосипеда для даунхилла стоит take into account the specific specifics of the discipline. If you wish, you can use the bike in everyday life. However, this is not very convenient and even somewhat difficult. So, for the development of tangible speed will have to pedal for a long time in a standing position. If you need to overcome protracted steep ascents, such a bicycle will make you walk on foot. Therefore, when it is planned to practice extreme driving several times a month, the purchase of an expensive vehicle seems to be irrational.
