Winter tires of category SUV

The Finnish company Nokian Tyres has developed the new winter tire Hakkapeliitta SUV specially for drivers. So it or not so, but anyway the first presentation of a novelty for journalists of automobile editions has passed well. Similar actions become already for Nokian Tyres tradition – one year ago Finns represented frictional tires Nokian Hakkapeliitta Rsi. And in it anything surprising isn't present: it is difficult to find the country with more severe weather conditions and that is the most important, with more snow-covered winter roads.

What for off-road car winter tires?

As it is possible to guess from the name of new tires, they are intended for cars of class SUV (Sport Utility Vehicle), promptly extending and in the world to that the certificate – number officially registered off-road car for 2001 - 2003 And if about 10-15 years ago off-road car were used directly and were the working horsies moving with speed, not exceeding 140 km/h today it is the high-speed modern cars which have lost in passableness, but developing speeds over 200 km/h. That is the park has grown not only quantitatively, but also is qualitative. According to the similar car modern tires, with a high indicator of speed are necessary.





In the relation of "correct footwear" for the winter among many owners of such cars there is an error: "At me a full drive, 4x4, my car everywhere will pass, and consequently winter tires aren't necessary to me …". Partially they are right. Yes, the full drive allows to get under way faster from a place in the winter and more confidently to feel on road. But it is impossible to forget that at braking or lateral sliding full-privodnoj the car loses all advantages and differs nothing from FF and FR. And if the last "on thorns" on their background the healthy fellow simply helpless, yes plus also dangerous to associates looks.

The second important point: potentially in cars of class SUV the big possibilities in comparison with mono drive gear are put. It and possibility to park in a snowdrift, and possibility with impunity to move down after the journey where it is better to another not to be put. However summer tires during the winter period (and it lasts, as it is known, almost as much, how many and summer) don't allow the owner is high-grade to use off-road car on all hundred. It all the same what to buy an aqualung and to swim in it in five-meter pool It is necessary to remember also that, as a rule, off-road car is heavier car, and the tire has such parameter as a load-carrying capacity index, and it will be wrong to establish simply tires from "an automobile" number of suitable dimension. Such tire can simply not sustain loading and burst (we will remember incident with off-road car Ford).

The fourth Hakkapeliitta?

With strengths of a novelty we were acquainted by the chief of department of development of production Nokian Tyres. So, tire SUV has the big width of a protector that provides big the stain of contact positively influencing stability. It is very important for such cars as their center of gravity is located highly. In turn, the wide protector has allowed to make thorns on big to width. The number of numbers of thorns (from above 14 – depending on the size of the tire) which scratch ice accordingly increases. Together with a wide stain of contact it improves coupling of the tire with road, and, hence, dispersal will be more intensively, and braking – is more effective.

The method of thorns and optimum arrangement of thorns provide small noise of the tire at any speed, at any situations. At thorns Nokian applies patented system Eco Stud System – a rubber layer of a mix which the thorn body concerns, very dense, therefore thorns are well kept. Also under a thorn there is an amortization small pillow. Its functions – decrease in unpleasant acoustic noise, preservation of thorns throughout all service life of thorns, and besides, such tires spare roads.

With tetrahedral thorns

We already mentioned tires Nokian Hakkapeliitta 4, one of which features is the thorn with tetrahedral forms: the body of a thorn and hard inserts. As representatives Nokian Tyres declare, one only this decision raises indicators on coupling on ice for 5 percent. It seems that in the near future all new thorns tires Nokian will appear with square thorns. Here and SUV not an exception – its body has bristled up tetrahedral thorns. But not such, but others, developed specially for this tire. First of all, at protector survey is evident that the thorn square isn't always focused by a diagonal in a movement direction as at "fourth" "Nokian", and having looked at the thorn image, found out, as a thorn body now the round. And the case of thorn SUV against aluminum at Hakkapeliitta 4 is made on automatic lathes of a steel. Steel application not casually – the steel thorn more strong also is capable to perceive the big loadings.

Use of the tire for heavy off-road car means the strengthened structure of the tire maintaining the big loadings. For this purpose, and also for increase of wear resistance of the new tire by developers new technical decisions have been put some. In skeleton Nokian Hakkapeliitta SUV two packages steel are applied. For friction prevention between packages the insert from special rubber is along the edges entered. Wear resistance of the tire raises at the expense of application of a seamless nylon bandage which in a humeral zone has the two-layer strengthened design. In an onboard part of the tire, that which close approaches to a disk, too puts the new technical decision – a seamless design of an onboard ring from the special rubber mix, giving to the tire additional durability and improving landing to a disk.