- Country of manufactureGermany
AL - KO accessories, for trailers of 750 - 3500 kg, automobile lighting engineering, automobile disks - R14 112/5 loading of 950 kg of MEFRO Germany
Classification of autotires
Depending on appointment:
on a way of sealing:
on a design:
in a form of a profile of cross section:
wide - profile
low - profile
superlow - profile
as protector drawing:
all - weather
The framework of the diagonal tire consists of a certain number of the rubberized kordovy laying which edges are twisted around wire ring cores (these cores provide landing of the tire to a disk). All threads of a cord of a framework and a breker cross in adjacent layers and have in a middle part of a racetrack tilt angles of threads of a cord of a framework and a breker 45 ° - 60 °. Number of adjacent layers usually four. The design of diagonal tires became outdated, but they continue to be released (generally for cars of old designs) because they are rather cheap in production, their framework is less subject to destruction at blows and cuts.
In radial tires (type R) all threads of a cord of a framework are located in parallel on radius from one board to another. Threads of a cord of a breker lie similarly diagonal, only under a big corner. At such design of only one framework it is not enough to maintain efforts in the cross direction when driving on a curve, and also considerable loadings at acceleration. Therefore they have to be supported and be supplemented with other elements of the tire. This task is undertaken by a belt of a steel cord in which two layers are reeled up alternately at an acute angle. Many tires are in addition stabilized by a nylon bandage.
Consist of a tire and a chamber with the gate. The gate (the backpressure air valve) allows to force air in the tire and interferes with its exit outside.
Differ in existence of the air - tight rubber layer put under the first layer of a framework (instead of a chamber). Tightness in them is reached by dense landing of a tire to a rim. The gate for forcing of air in the tire takes place and pressurized in a wheel rim opening.
They are distinguished by accurately expressed longitudinal flutes for water drainage from a spot of contact of a protector with the road, poorly expressed cross flutes and lack of microdrawing. Besides, they always have the smooth rounded transition from a protector to sidewalls.
Tires of this type provide the maximum coupling with the dry and wet road, possess the maximum wear resistance and are best adapted for high - speed driving. But they are of little use for the movement on soil (especially wet) and winter roads.
High - speed tires (category N above) differ in the increased ability to resist to an overheat, preservation of stable coefficient of coupling with the road irrespective of features of swing at a high speed.
All - weather tires
Are well adapted for work on dry and wet asphalt, differ in satisfactory fitness to winter roads and big wear, in comparison with summer.
Protector drawing more branched, elements of drawing are grouped in well distinguishable path and are divided by flutes of different width: on drawing elements — "checkers" — there are narrow cuts of additional microdrawing.
As a rule, on such tires there is a marking of all season, tous terrain or conventional signs (a snowflake or a drop).
Are intended for work on snow - covered and ice - covered roads which coupling qualities of a covering can change depending on a situation, from minimum (smooth ice or porridge from snow and water) to small (the rolled snow on a frost). Drawing of a protector of such tires has accurately expressed checkers from longitudinal and cross flutes of considerable depth. At checkers a difficult figured relief for increase in working lateral surfaces, and also branched microdrawing.
Winter tires designate an index M + S. Often they have strictly certain direction of the movement (it is specified by an arrow).
More plastic rubber (for work at low temperatures) winter tires in summer conditions is subject to fast wear, an overheat, small firm objects easily get into a protector of such tires.
Wear resistance of winter tires is 30 - 50% less summer also because of a specific protector.
Many winter tires allow to establish thorns of antisliding or have them. At the movement of the car at the air temperature of - 10 °C at a zone of contact of the tire with the road there is always a thin layer of moisture (the tire heats up from friction and deformation). Therefore on the snow - covered road a problem of thorns of antisliding — to press through the damp film playing a greasing role and to provide reliable contact of the tire with the road. For each tire of the concrete car and taking into account nature (intensity) of the movement select the thorns which are most suitable on a standard size. Some firms specify the preferable size of thorns on a sidewall.
It is the rarefied drawing of checkerboard type with the developed gruntozatsepa on a humeral zone, with the powerful not deformable checkers which often are not dismembered by cuts.