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This bicycle is intended for performance of every possible tricks in style of a skateboard and, accordingly, it is not adapted for fast driving and tourism. Even that is no a seat on such bicycles . BMX has very wide wheels (to 2.5 inches), their diameter makes approximately 20 ".
This bicycle, as well as tracking bike, make with very strong, light and low frame that it could maintain any loadings at operation, and loadings are very big. ÂÌÕ bicycles have gear change function, but, depending on concrete mission of a bicycle, it can be or not. Handlebar and front wheel can rotate on 360 degrees without any harm for ropes of the brake mechanism. Frequently these bicycles are hard-shocked, with a small course of a fork, but not always. On ÂÌÕ bicycles are usually put hydraulic brakes, as well as on mountain bikes, for more accurate braking. Years of trainings are necessary for performance of tricks.
This bicycle does not demand to itself special attention and maintenance service. It is intended for everyday trips, therefore its main properties is a comfort and safety.
The city bicycle can be used for transportation of small cargoes. Its design provides long mudguards for protection against dirt. The city bicycle has the least quantity of speeds in comparison with other kinds (from 1 to 7) and is not intended for fast driving. It's the heaviest bicycle its weight makes such bicycle from 12 to 18 kg that twice exceeds weight of some highway bicycles. Width of tyre covers approximately same, as at tourist, 28-40 mm. Diameter of the wheels established on city bicycles, varies in a wide range: 406, 445, 533, 559, 590, 622 mm. Brakes on these bicycles not so effective, but special sharpness of braking here also is not necessary. The city bicycle is very easy for operating and special skills for this purpose it is not required.
Difference of a mountain bicycle from others is in the following: wheels of such bicycles are much wider usually (about 50 mm instead of 20-40 mm.) also have smaller diameter (650 mm.); the frame of such bicycle too differs the geometry from a frame of a road bicycle, its carriage raises till 29-33 cm, and is adapted for driving on impassability. A frame is usually made of light metals and alloys. Wide wheels are made for mountain bicycle more reliable and safe.
Mountain bicycles have gear change possibility; a range of switching of speeds on modern mountain bicycles very big (21-27), therefore it is possible to pick up easily necessary speed under any slopes. Shock-absorbers on a steering plug, and also back provide comfort at movement and ease in management that is important at extreme driving. On mountain bicycles hydraulic brakes are often applied, in comparison with usual drives they provide more accurate and soft braking.
Rubber on mountain bicycles is applied with higher drawing of a protector that provides the best coupling on slippery sites of road and to bad weather. And, though on equal road it will not give such high speed as other bicycles, but compensates all on mountain tracks and abrupt slopes.
Downhill is a downhill racing from mountains, the main purpose of driving isn't simple climbing down but climbing down at highest speed. Accordingly, this kind has a number of specific features. The main thing it the raised reliability, in other words any breakages can lead to the most unpredictable consequences and consequently paramount value is given to a design. They are supplied with the strongest wheels, suspension fork, reliable brakes (as a rule disk). The second group of features is connected with the going downwards, accordingly the problem of minimisation of weight is not necessary, wide rubber is used, the centre of gravity is shifted back. In the present for Downhill usually are used two-shock bicycles.
Two - three- and four-wheel bicycles are usually produced for children of different age. On children's bicycles all acting and dangerous parts hide or do rounded off, the main thing is safety of the child at driving. The children's four-wheel bicycle can be made in such a manner that small back wheels are took off and it becomes two-wheeled as a result such bicycle approaches for children of almost any age. Children's bicycles, as well as racing ones, they try to make as light as possible, so in case of falling there were no serious traumas at the child.
Sizes of child's bicycles naturally are the least of all other kinds. On such bicycles are often set tubeless tires for protecting from punctures. Child's bicycles usually are produced without speeds but sometimes it possible. Diameter of wheels for them approximately 200-350 mm. Possibility of regulation of height of seat and helm is foreseen in the construction of child's bicycle, and it is very important, in fact a child grows quickly.
High-speed cross-country on a cross-country terrain. They can be with an unicrown fork and with a suspension fork, the weight is minimised. Bicycles are produced from carbon or from aluminium. Have much in common with bicycles CycloCross.
This bicycle has a foldable frame and as a result a lot of place for storage does not demand. Some of such bicycles even are located in a backpack. The basic advantage of a folding bicycle is possibility to fold it double for some seconds, after all to combine such bicycle, it is enough to open only a clamp on a frame. Some models of these bicycles have foldable pedals and demountable wheels for more compactness at transportation.
Folding bicycles have small weight, only 7-9 kg. For the this bicycle various designs of a wheel, usually it high and bent . On them establish different kinds of brakes (both manual, and foot) and different number of a gear change (from 1 to 7). Diameter of wheels usually small, nearby 51 cm (there are models with a diameter 66 cm), they are not intended for high-speed driving. The foldimg bicycle has a small luggage carrier for transportation of small cargoes.
This bicycle approaches for all kinds of trips: and round-the-world, and for work, and simply to drive. Unlike racing bike it has one or two luggage carriers which are ideally suited for transportation of small cargoes. The gear change range above, than at racer also makes from 10 till 27 speeds (on various models differently). Width of tyre covers of 28-38 mm. A wheel wider that creates comfort at driving on such bicycle, and it is necessary for long trips.
This bicycle approaches for all kinds of trips: and round-the-world, and for work, and simply to drive. Unlike racing bike it has one or two luggage carriers which are ideally suited for transportation of small cargoes. The gear change range above, than at racer also makes from 10 till 27 speeds (on various models differently). Width of tyre covers of 28-38 mm. A wheel wider that creates comfort at driving on such bicycle, and it is necessary for long trips.
The tourist bicycle possesses amazing stability, it is possible easy driving without hands. But manoeuvrability is worse, than at racing bike , because of the extended frame which can reach length more than metre. Diameter of wheels at it same, as on racing (590-622 mm), and weight of such bicycle naturally above, than at a racing bicycle (from 11 to 15 kg). In general, the tourist bicycle is something an average between highway and mountain bicycles.
On such bicycle is set neither brakes nor speeds. It's produced without all these parts in order to lower it weight as possible/ A track bicycle is intended for setting of records, and mainly he is applied for riding on stadiums.
It has a very hard frame, done from an aluminium, and handlebar are usually made on such bicycle bent ("sheep horns"), as on tourist or racing bikes, but can be also straight. On pedals there are small straps so during riding a leg is fastened to the pedal, thus it becomes impossible simple motion of leg. It is done, in order a bicyclist did not lose speed on track and not injured.
High speed of acceleration on a track bicycle exceeds 40km/ch. Wheels are fastened witout clamps, only with nuts, because replacing a wheel is required rarely, and fastening reliability is increased, their width approximately 40 mm, a diameter is 20-26 inches. To adapt to absence of brakes enough difficult, but after the pair of months of trainings, it becomes usual.
Trial is overcoming of obstacles. Bicycles are used in a trial have a frame of the small size, small weight. Sometimes they have a forward suspension fork , the unicrown fork is sometimes used. Brakes as a rule hydraulic, such brakes provide the best control.
The essence of these bicycles also is visible from the name, they are intended for driving on a cross-country terrain. They are not intended for any races and in this connection it's not a pure subtype. Variants of decisions are very diverse, can be as full -suspension, and have only a front suspension fork.
This type of bicycle is intended for speed riding on good roads. The weight of such bicycle is minimum, from 7 to 11 kg, - it the lightest one. Such bicycles have the streamlined form, narrow handlebar, due to these conditions windage strongly diminishes. It is possible to hang a flask for drink on its frame and no moreover, because it is not intended for transportation of loads unlike city, which is supplied with luggage rack.
Racer has from 10 to 18 speeds that allows it to be dispersed for a short time interval till high speed, on 7-10 km/h above, in comparison with city or mountain bike. Diameter of wheels is more than at mountain (590-622 mm.), and they narrower (18-30 mm). For maintenance of lightness in tubes they create enough high pressure. Also it is a bicycle possesses the excellent manoeuvrability surpassing many other things. The racing bicycle is simply irreplaceable for bicycle competitions such as racing and road.
