How to choose a bicycle

How to choose a bicycle? When there was a first serial bicycle (more hundred fifty years ago), people were not tortured yet by a question "how to choose a bicycle?" - the special choice was not. Since then the bicycle has essentially changed, its popularity has considerably grown - a variety of types, models and marks of bicycles grows also. How today to choose a bicycle? We will make bold to give you some councils for choice a bicycle. Conditionally bicycles can be broken into three age groups: "nurseries", "teenage" and "adult". The children's bicycle represents more likely a toy, than serious means of transportation. On it far you will not leave. Besides the child quickly grows, growing from the toy. However it is not necessary to hasten and buy to the child a bicycle. It for you the toy, and for the child is the serious car demanding fair skill and time for development. Therefore, choosing a bicycle for the child, it is necessary to consider its age, growth and development degree. Bicycles for the smallest - tricycles, with pedals rigidly fixed on a forward wheel. They are intended for children of 2-3th years, growth of an order of 95-103 sm, and are very easy-to-work. Knots of adjustments at them, as a rule, are not present; ball-bearings and the knots demanding greasing, too are absent. As a successful example of such bicycle many models of home producers (for example a tricycle "Kid") can serve. One of their basic advantages - absence of congestion various accessories. With such bicycle the child easily consults independently. Import bicycles, of course, look more attractive, and their assortment is more various. At a choice of such bicycles, the main thing not to forget about its basic purpose. Bicycles with demountable added castors on each side are intended for training of the child to driving on two wheels. They promote formation of correct landing and development of sense of the equilibrium. These bicycles are calculated on age from 3 till 7 years. The Russian models, as a rule, have diameter of a wheel of 12 inches on growth of the child 105-128 see Only rather recently there were children's bicycles with 16-inch wheels. The size of a frame and diameter of wheels in different models can differ considerably. In that, as them it is possible to pick up advantages of a choice of import models of bicycles more precisely under growth of the child. Correctly to pick up a bicycle according to growth of the child, it is necessary to remember some reference points: growth of the bicyclist should be equal to two and a half to diameters of a wheel, and the length of a frame (distance from an axis of a wheel to a saddle first line) should equal to distance from an elbow of a hand of the child to tips of the extended fingers. Weight of bicycles with 12 ? wheels - 7-9 kg; Distance between axes of wheels (base of a bicycle) - 650-700 mm; height of a saddle from the earth - about 600 mm. On the most simple models plugs are established not inflatable tyres, and, spokes of wheels and a saddle are made of plastic. Tyres, as a rule, the wide: 1,95 ? - 2,5 ? - for passableness and stability improvement; the wheel and a saddle are regulated on height; the frame of a children's bicycle should be low that the child could come off easily a bicycle in case of failure; a chain and asterisks with a view of safety should be protected a casing. However be attentive: the bilaterial protective casing though excludes clothes hit in moving parts, but has the minuses. The dirt which has got under it can complicate movement, a moisture to lead to metal corrosion. Children's bicycles are equipped by a manual brake type and-or the back brake plug. Choosing between "brake" and plugs of a back wheel, it is necessary to consider, the child will go by what bicycle further. Because it is psychologically uneasy after "manual" brakes to get used to "foot", and on the contrary. It is necessary to notice that all Russian teenage bicycles and the majority of road bicycles are equipped by "foot" brakes, and "manual" brakes equip basically multihigh-speed bicycles: mountain, tourist. "Teenage" bicycles and bicycles for younger school age (7-12 years) represent a small copy of an "adult" road bicycle. They are adapted for long trips, have good high-speed characteristics and longer service life. One of the most popular classes of bicycles for children is more senior 8th years is sports bicycles. At them a wheel of 20 inches with wide it is deep tyre covers. The basic knots are borrowed adult bicycles and have high safety factor. The frame represents a rigid welded design of the diamond-shaped form with an oblique top pipe. The high arrangement of the carriage and the truncated base provide to such bicycle high passableness on impassability. On the top pipe of a frame the lining from porous plastic settles down. On a back wheel the standard brake plug. It is necessary to pay attention that models of "adult" road bicycles with the truncated base, 24 - inch wheels and rods of pedals of the "adult" size teenagers. "Adult" bicycles share on four cores : road, tourist, mountain and hybrid. Road bicycles, (which else name: traditional, comfort, city) - most inexpensive of everything that is on sale. They are intended for daily trips on affairs and calculated on long-term service. Road bicycles are not calculated on sports loadings. Inexpensive materials and technologies are applied to their manufacturing. Frames - steel, as a rule, are not present switching of speeds or the set of transfers is limited: three - five. The road bicycle is heavy enough: 15-18 kg. Let's give some councils how to choose a road bicycle. A basis of any bicycle - a frame. At road bicycles of a frame happen closed (trapezoid, "man's") and opened (without the top pipe, "female"). The closed frames at the least weight are most reliable: pipes straight lines also work on a stretching-compression. At purchase of a bicycle with the closed frame it is necessary to consider that the distance between the top pipe of a frame and should be not less 10 in avoidance of a traumatism by last. Open frames are made both of straight lines, and from the bent pipes. Thus on the bent pipes fall also bending loadings. In comparison with "closed", "an open" frame always less rigid. For its strengthening use more thick-walled pipes that considerably makes heavier a design. Such frames can be collapsible or demountable then the bicycle is easier for transporting and storing, but reliability of a design thus will fall. Any frames are carried out from qualitative steels and have round section. Then they serve tens years. Others do from steels. Such pipes thicker also have a welded seam on all length. They are strong enough in a longitudinal direction, but poorly maintain loadings in the cross-section. At modern bicycles, as a rule, a design, however places of joinings on welded frames are not always made qualitatively. At qualitative frames in a joining place one pipe passes in another very smoothly and almost imperceptibly. It is necessary to remember that any wheel can move an obstacle no more than 1/3 radiuses. Diameters of wheels vary from 20 ? (small) to 28 ? (big). Advantage of the big wheels - an equal course, high speed of movement and good passableness. With reduction of diameter of a wheel speed of movement falls, but it is easier to twist pedals. The bicycle with small wheels is easier for adjusting to growth of the bicyclist. Wheels can be narrow (1,5 ?), wide (1,95 ? - 2,1 ?) with deep a protector, as on mountain bicycles, and universal (1,75 ?). It is good to go By narrow wheels on asphalt. For impassability wider wheels will approach, but on asphalt by them to go worse. If the bicycle has to be used in various conditions, is better to choose universal wheels. The bicycle step (distance which it passes for a complete revolution of pedals) depends on number of teeths of asterisks in transfer and diameter of a wheel. At bicycles with multistage transfer the step varies - from 1,5 to 10 m. Such wide range can be important for trips in which sites of usual driving are combined with heavy liftings and descents. Choosing for itself a road bicycle it is necessary to remember that landing of the bicyclist should not be very inclined that by means of the bent wheel it is possible to choose more convenient landing that the bicycle should be necessarily equipped , and wider saddles are necessary for women. Choosing a mountain bicycle, it is necessary to be defined to begin with: for what you are going to use it. For high-speed driving on a cross-country terrain choose an easy bicycle with the forward shock-absorber. To jump through obstacles it is better on a rigid bicycle with good brakes. For downhill racing will approach heavy-duty. At the present mountain bicycles from 21 till 27 speeds which can be switched depending on that how much a steep slope or descent. Three leading asterisks in front essentially expand a range of transfer relations. The big asterisk in front should have 50-53 teeth, small - 24-28. At the big asterisk behind should be not less than 28, and at small - no more than 12-14 teeths. The majority of models are equipped by forward shock-absorbers. Distinctive features of a mountain bicycle are: the reduced size of wheels (26 ?), the increased diameter of pipes, the Y-shaped form of frames and a direct wheel. The raised durability of knots and details allows to be careful to a lesser degree at overcoming of obstacles. However it is necessary to notice that the similar form of a frame and a direct wheel do not approach for driving lasting many hours in a current of many days successively. The hybrid bicycle is suitable for driving practically everywhere, except heavy impassability. Such bicycles represent a combination of various components of mountain and tourist bicycles. Transfer parities of a drive provide high speed on highway and passableness on mountains and impassability. Tyre covers with a superficial protector do a bicycle by more suitable for driving on highway. However the structure of such bicycles has not settled yet definitively, and in it any changes are possible. In conclusion of given article we wish to recommend to you as to familiarise with article "It is time to buy a bicycle" - this information will help you to be defined with a financial side at bicycle purchase. As you can read about that how to choose an inexpensive bicycle (second half of article). And here you can learn more about "the technical" party of a question of a choice of a bicycle. We wish you successful purchase, and you have already made a correct choice - having decided to buy a bicycle.