Weight of bicycles with 12 inch 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 US 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.