CN1211219C - Tire of automobile wheel - Google Patents

Abstract

The present invention relates to a tyre. Tyre crown stripes (1) are arranged on blocks (2 and 3), wherein the block is composed of a first set of knife slit patterns 8 and a second set of knife slit patterns 9; the knife slit patterns deflect in the opposite direction correspondingly to the orthogonal direction of a rolling surface (S) of the tyre crown strips. The knife slit patterns deflect towards a clamped side of an acute angle according to a concave part of a curve; the clamped side of an acute angle is expressed by a corresponding elastic part (10) limited in the block by the knife slit patterns. Each block is limited on periphery by a transverse slit (5) and a longitudinal slit (4); each transverse slit and the longitudinal slit are respectively provided with a first side 11 and a first side 14 and a second side 12 and a second side 15, wherein the first side 11 and the first side 14 are orthogonal with the rolling surface; the second side 12 and the second side 15 are separated from the first side towards the rolling surface.

Description

The tire of automotive wheel

Technical field

The present invention relates to a kind of tire with automotive wheel of crown striped (tread band), it comprises: many projection pieces, every all border district is limited at least two substantially along between the circumferential pod that extends of tire, and between two translots of at least two described pods of connection; In described, make first group of tire sipe and second group of tire sipe, each tire sipe according to relatively and the direction deflection of the quadrature on the outer rolling surface of crown striped towards, separate each piece and become many elastic portion, this elastic portion week in harness setting in border district, each piece comprises a mounting board limit, and it acutangulates on described outer rolling surface.

In more detail, the present invention refers to a kind of usually said " winter " type tire and the method for producing such tire, and the tread contour of the crown striped of this tire is particularly suitable for travelling on road surface lid snow and/or that freeze.

This winter, the type tire need be except that the good drive ability aspect travelling on lid snow road surface, also has the good characteristic aspect other performance characteristic, as in the ride comfort on wet surface and the performance characteristic of travelling aspect kilometer efficiency (kilometricyield).

Other characteristic is at the ride characteristic of doing the surface and low noise when travelling, although above-mentioned relatively characteristic is more inessential, it also help to provide one or bad winter the type tire evaluating characteristics.

Suitable periphery determine above-mentioned operation and character of operation with horizontal groove by being provided with in the crown striped, this groove must have suitable dimensions and orientation, is arranging so that piece is aimed at orthogonally, and these pieces are provided with shoulder to shoulder and circumferentially extend along tire.

In addition, the thin slice shape that appearance in piece is suitable, one group of thick narrow otch just, they particularly on the road surface of lid snow, reach ride characteristic aspect be important with indispensable, this narrow otch along the circumferential direction is provided with shoulder to shoulder, and its direction is the horizontal of rotating direction substantially.

Background technology

As everyone knows, since the friction force that is produced by snow opposing snow is the friction force that produces on snow greater than rubber, the task that these narrow otch are called " tire sipe " more simply comes down to collect and clamp efficiently snow.

In US Patent 4298046, (as the example of the situation of the maximally related prior art of the application), it has described the crown striped of type tire in a kind of winter, it comprises the row piece of four peripheries, it is limited to by in the straight substantially vertical circumferential groove and translot scope, be vertical equally, comprise substantially and the wall of outer rolling surface quadrature, coming in contact between crown striped and the road surface on this outer rolling surface.

In order to improve the stickness of tractive force and braking, the piece that is positioned at axial outer array should comprise tire sipe, this piece is positioned near the tyre rim, this tire sipe is orientated according to the leaning angle about 30 ° with respect to rolling surface, and originally extends according to the straight extendible portion that is parallel to the tyre revolution moving axis substantially on one's body at rolling surface.Be positioned over the zone line of tire, the piece that belongs to periphery row has and be positioned at the similar tire sipe of those tire sipes that the edge columns piece is made, but tilt along opposite sense with the latter.

In each piece, tire sipe defines many elastic portion, because the obliquity of tire sipe itself, this elastic portion has presented the wedge angle limit that can produce efficient binding force on the road surface.Specify hand of rotation by giving tire, the sharp edge of elastic portion that is positioned at the piece of edge columns produces when accelerator efficiently, and be arranged in middle column piece elastic portion sharp edge in the process generation of braking efficiently.

In patent EP498287, a kind of tire has been described, wherein in order to improve the ride comfort in the wearing and tearing of piece itself, limit the crown striped piece translot relatively and the direction deflection of rolling surface quadrature.The orientation of translot that is positioned at circumferential edge row piece is opposite with the orientation of the translot of the piece that is positioned at middle column.Give tire different hand of rotation in addition, depend on whether it is relevant with the drive wheel or the flower wheel of automobile.

In patent EP384182 and disclosures in Italian patent application MI94A000309, the tire of heavy goods vehicles has been described, it is provided with the row piece of periphery, and this row piece is limited by the cross sections of reduction width, its rolling surface orthogonal directions deflection relative and the crown striped.

Summary of the invention

According to the present invention, can find in the crown striped, to have the advantage of the piece of tire sipe, this tire sipe has the horizontal expansion part of the direction of tilt and the curve of relative rolling surface, in any case or such layout is so that limit concave surface towards the edge run-out of acute angle mounting board, represent for one of two elastic portion that this acute angle mounting board limit is limited by tire sipe itself.Because the inevitable structure of each elastic portion moves this section as a little scoop substantially, cutting, the inside of picking up snow and collecting, be clamped in tire sipe, therefore at first on a road surface lid snow and/or that freeze, improved at the sticking action of holdback force and/or braking.

A kind of tire of automotive wheel is provided with the crown striped, comprising: polylith projection piece, and all border district of each piece are limited between two pods and two translots at least at least, and this pod circumferentially extends along tire basically, and this translot and described pod intersect; First group of tire sipe and second group of tire sipe, they form in described, each tire sipe according to respect to the inclined orientation of the direction of the outer rolling surface quadrature of crown striped, each piece is divided into a plurality of a plurality of elastic portion that circumferentially are provided with abreast, each elastic portion comprise one on described outer rolling surface acutangulate mounting board limit, it is characterized in that: each tire sipe is corresponding to the horizontal expansion of a curve extension part along piece, and described curve extension partly limits the concave surface towards the acute angle mounting board edge run-out of corresponding elastic portion.

Say in further detail, an object of the present invention is to provide a kind of motor tire, it is characterized in that the recessed extendible portion of each tire sipe basis towards the mounting board limit of corresponding elastic portion of piece laterally extends.

Best, the tire sipe that is positioned at first group and second group is distributed in corresponding periphery row, and these row are axially placed shoulder to shoulder, and advantageously are staggered.

Especially, being positioned at correspondingly, each peripheral tire sipe that is listed as of first and second groups preferably interrelates with a corresponding peripheral row piece.

Advantageously, each tire sipe that piece can be set laterally extends on its whole width substantially.

Each tire sipe can have the end of at least one reduction degree of depth, and it is near the pod that limits relevant block.

In a most preferred embodiment, each tire sipe comprises a curve extension part substantially, the longitudinal centerline symmetry of its corresponding relatively piece.

In addition, each described elastic portion can be provided with the opposite end, and this end tilts to corresponding pod bearing of trend, to drop into the side sawtooth of described pod qualification.

According to the present patent application on the other hand, this application also can be irrelevant with the horizontal expansion part-structure of tire sipe, it is useful being limited between first side and second side for each described translot, this first side substantially with the outer rolling of crown striped surface quadrature, second side departs from towards rolling surface itself from first side.

Relative rolling surface, preferably described second side comprises a direction, its with the tire sipe of relevant block direction similar or consistent.

Each piece also can be set should comprise that at least one drops into the horizontal edge in the corresponding translot, to limit a grooving that has second side of translot itself, this each piece is near described rolling surface.

Advantageously, each described translot extends along parallel with the tire sipe extendible portion substantially direction, and be positioned at the equidistant placement of translot of the piece that reciprocally is provided with vertically shoulder to shoulder, extend according to the continuous translot of waveform extendible portion so that limit substantially.

Can be expediently, each described pod should be limited between first side and second side, this first side substantially with the rolling surface quadrature, this second side along the direction of rolling surface itself from first lateral deviation from.

Near rolling surface each piece also can comprise a longitudinal edge that drops at least in the corresponding pod, to limit a grooving that has second side of pod itself.

Be preferably in each described pod, the mutual alignment of first and second sides of the pod of the relative peripheral adjacent in mutual alignment of first and second sides is oppositely directed.

Expediently, continuously pod is set so that limit continuous substantially circumferential groove.

Best, the circumferencial direction diagonally extending of the relative tire of each described pod is so that each described circumferential groove is extended according to broken line (brokenline).

In the most preferred embodiment according to tire of the present invention, two row periphery edge pieces are set at least, it extends near the relative side of crown striped, and row or the relative tire equator of row of more peripheries a intermediate mass in the face of claiming to place, be positioned over the piece on the both sides of the equatorial plane, this equatorial plane correspondingly comprises correspondingly opposite orientation.

According to a different aspect, the present invention relates to mounting board is avenged in a kind of raising in the tread of tyre decorative pattern of automotive wheel method, comprise such step: make the row piece, the circumferential extension direction of tire limits every between pod and translot relatively; Separate each piece by many tire sipes and become many elastic portion, this tire sipe extends in tire from outer rolling surface radially; Make the shape of described tire sipe on described rolling surface become concave; And preferably with each tire sipe of angle tilt, relatively and the perpendicular line of rolling surface quadrature, this angle is between 20 ° and 35 °.

According to the present invention, by the detailed description to a unenforced embodiment of the best of motor tire, further characteristic and advantage will be more clear.This describes reference accompanying drawing thereafter, and accompanying drawing provides as non-limiting example.

Description of drawings

Fig. 1 is the partial view of the crown striped of tire constructed in accordance;

Fig. 2 is the local schematic bottom view that shows the piece of crown striped, and its relative tire S. A. is got section in diametral plane;

Fig. 3 is similar to Fig. 2, and it is presented under the effect of the power that produces in the wheel ground contact area, the distortion that the elastic portion of piece stands;

Figure 4 and 5 are represented the interior section of cross-sectional plane of the pod of crown striped, and it is to get the cross section along IV among Fig. 1 and V line;

The section in the cross section of the translot that Fig. 6 and 7 expressions will limit at the edge columns piece in the crown striped and middle column piece, it gets the cross section along VI among Fig. 1 and VII line;

Fig. 8 is the cross section along the VIII line among Fig. 1, the section of the longitudinal cross-section of its outstanding tire sipe.

The specific embodiment

Especially with reference to Fig. 1, the crown striped of tire constructed in accordance generally represents with numeral 1, because the remaining part of tire can obtain easily in some modes for those skilled in the art, so do not show them.

On crown striped 1, be limited with many projection pieces 2,3, each piece week the border district be limited between at least two pods 4 that circumferentially extend along tire substantially, and at least two with the crossing translot 5 of pod 4 between.Best, pod 4 is continuously along the circumferential extension setting of tire, and to limit continuous basically circumferential slot 6,6a, this groove limit corresponding circumferentially piece row 2,3.In further detail, in an illustrated embodiment, the equidistant median surface X-X that at least two circumferential side channels 6 leave a tire is provided with symmetrically, so that limit two edges piece 2 row at least, this piece is listed as along the relative side of crown striped 1 and extends, and row or multiple row intermediate mass 3 relative equatorial plane X-X are symmetrical arranged.Shown in embodiment, intermediate mass 3 is divided into two and circumferentially is listed as, and it is separated by the middle circumferential slot 6a that is arranged in the equatorial plane X-X face.

In a most preferred embodiment, the orientation of pod 4 tilts to circumferential bearing of trend, so that each circumferential slot 6 and central channel 6a extend with the form of broken line substantially.

For example, each pod 4 degree of depth P ₁8 and 11mm between, its width L ₁5 and 8mm between, they are to go up on the outer rolling surface " S " of crown striped 1 to measure.

As a kind of index, translot 5 degree of depth P2 also 8 and 11mm between, preferably and the deep equality of pod 4, its width L ₂4.5 and 8.5mm between, it increases along with leaving equatorial plane X-X continuation far away more.In other words, be positioned at the width of translot 5 of edge block 2 preferably greater than the width of the translot 5 that is positioned at intermediate mass 3.

As shown in Figure 1, by this way, promptly correspondingly be arranged on the mode that the piece 2,3 on each side of equatorial plane X-X is arranged by opposite sense correspondingly, conjointly place successively and be positioned at different masses row 2,3 translot 5, with form the trend of waveform substantially continuous translot 7.In other words, according to the present invention, the crown striped 1 of tire preferably is set to symmetrical two-way type, and performance characteristic is not put on the influence of the hand of rotation on the wheel substantially.

At least on piece 2,3, also be provided with first group of tire sipe 8 and one second group of tire sipe 9, as a kind of index, the degree of depth P of tire sipe ₃Close with the degree of depth of pod 4 and translot 5.The width of tire sipe 8,9 preferably is no more than 0.5mm, and it is circumferentially spaced apart, and each spacing value is D ₃, as a kind of index, 3 and 6mm between so that piece 2,3 is divided into the elastic portion 10 of many in harness circumferential settings.First and second groups of tire sipes 8,9 relatively and the direction " N " of rolling surface " S " quadrature, with angle α tilted alignment, this angle preferably equals 25 ° between 20 and 35 °, so that each elastic portion 10 on the rolling surface of itself, has an acute angle mounting board limit 10a.Because the tire sipe 8,9 that is positioned at first and second groups has correspondingly opposite direction of tilt, correspondingly they is made a distinction.

The tire sipe 8,9 that preferably is positioned at first and second groups is distributed in corresponding circumferentially row, and these row are axially to place ground shoulder to shoulder, the serial arrangement that they are preferably staggered.In more detail, the tire sipe 8,9 that is positioned at first and second groups can interrelate with the circumferential row that formed by corresponding plot 2,3 in one way, and this mode is orientated in opposite direction for the tire sipe 8,9 of each piece row 2,3 comprises with the tire sipe with respect to the row of the tire sipe of these row or adjacent block.

Advantageously, as shown in Figure 1, each tire sipe 8,9 of corresponding piece 2,3 laterally partly extends with curve extension, this extendible portion is substantially with respect to the cross central line symmetry of piece itself, or at least to extend a kind of comprising towards the mode of the recessed extendible portion of corresponding mounting board limit 10a, this corresponding mounting board limit 10a is by an expression of two elastic portion 10, and it is limited by tire sipe itself.

Best, each tire sipe 8,9 extends on the width of whole corresponding piece 2,3 substantially.In any case, can not get rid of 8,9 possibilities of on the partial width of piece 2,3, extending of cutter groove.In addition, as shown in Figure 8, the end 9a of the reduction degree of depth that each tire sipe 8,9 is set is approaching with pod 4 at least, and it defines corresponding piece 3, and this also is favourable.In the degree of depth of the tire sipe 8,9 of end 9a, as a kind of index, 0 and the degree of depth P of groove own ₃Half between.

According to the present invention, adopt the structure of such tire sipe 8,9 and position to improve the sticking action of tire widely, especially in the performance of quickening and braking so that improve its performance.

In fact, can find out that because opposing road surface deflection, and when deforming, elastic portion 10 distortion cause that corresponding mounting board limit 10a stretches out from the rolling surface " S " of crown striped 1 when the piece on ground contact area 2,3 in conjunction with Fig. 2 and 3.In this case, produce the pressure of high appointment on the 10a of mounting board limit, it will be lifted at ground-surface tire binding force.Quicken and braking procedure in, this phenomenon has been reinforced, at this moment, tangential force is transmitted to piece 2,3 in ground, this power directed in opposite, the acute angle that is formed by the mounting board limit 10a of corresponding variant part 10 is deflected.Because first and second tire sipes 8,9 are orientated in opposite mode, in acceleration and braking situation, piece 2 in ground contact area or 3 variant parts are suitable for the efficient related tangential force that transmits.

In addition, laterally the recessed extendible portion of tire sipe 8,9 has so characteristic, mainly be when the longitudinal sliding motion of piece 2,3 on the road surface of avenging at lid or freezing begins, the mounting board limit 10a of elastic portion 10 tends to mention or collect snow and ice towards the longitudinal centerline of piece itself, them are collected in inboard at tire sipe 8,9.Because the friction of the opposing that snow produces snow is bigger than the friction of rubber on snow, therefore the situation of a more favourable tangential force transmission has been determined.The distortion of elastic portion 10 is also strengthened in the gatherings in horizontal tire sipe 8,9 of snow and/or ice, and has therefore strengthened the protrusion of mounting board limit 10a.

According to a further aspect in the invention, in order to improve the tire performance characteristic, it also is favourable for 5 one-tenth like this that each translot is set, preferably should be limited between first side 11 and second side 12 along each translot that is parallel to the extension of tire sipe 8,9 directions, wherein first side substantially with rolling surface " S " quadrature, second side along the direction of rolling surface itself from first side, 11 deflections.Best, in any case second side, 12 orientation of each translot 5 are parallel to or consistent with the direction of translot 5 itself.As a kind of index, the angle that direction became of quadrature that can limit second side, the 12 relative rolling surfaces " S " of each translot is between 20 ° and 35 °.

Like this, each translot 5 can be given an important width, and for when tire travels on wet road surface, the elastic portion 10 in efficient draining and the input groove itself substantially can be identical with the shape of residual elasticity portion 10 or analogue, and this width is favourable.This on the one hand especially for even, the wearing and tearing of piece 2,3 also are favourable.

On second limit 12 of corresponding cross-drilled hole 5, each piece 2,3 should comprise one to the inner horizontal edge 13 that protrudes of groove itself, and this also is favourable.This horizontal edge 13 be in rolling surface " S " near, advantageously generated a grooving 13a who has second side 12 of translot 5.

In this case, adopt and protrude limit 13 on the road surface so that another mounting board fitting surface to be provided, and, especially have on the surface that lid is avenged with the time when piece 2,3 with the trend of the opposite sense slip in the orientation of corresponding mounting board limit 10a to promote the gathering of snow and ice translot 5 in.

In a most preferred embodiment, each pod 4 also can be set to be limited between corresponding first side 14 and second side 15, first side 14 substantially with rolling surface " S " quadrature, second side 15 is left the angle that tilts along the direction of rolling surface itself from first side 14, preferably between 20 ° and 35 °.

Shown in Figure 4 and 5, the corresponding IV and the V line that reproduce among consideration Fig. 1, relative layout in the pod 4 of circumferential adjacency, first side 14 and the mutual alignment of second side 15 in each pod 4 preferably also are arranged to oppositely.

In addition, each piece 2,3 can comprise at least one longitudinal edge 16, and this longitudinal edge protrudes towards corresponding pod 4, so that limit a grooving 16a who has second limit 15 of pod itself.

In order further to improve tractive force and tire braking performance, each elastic portion 10 also can be arranged to comprise one or two end 10b, the groove 4 of its relative pod or qualification relevant block 2,3, obliquely orientation.Therefore, the side serrations that drops into pod 4 is limited in the piece 2,3, and described jagged appearance has improved the clamping action of tire tire on the road surface of lid snow.

Therefore the present invention has realized the purpose wanted.

In fact, the method for the innovation that the present invention proposes is equivalent to the important raising aspect tractive force and tire deceleration and stopping performance, especially because the structure and the layout of special tire sipe.

Do not consider the structure of the curve extension part of tire sipe yet, special cross section in the cross section of translot and pod in conjunction with described tire sipe, has further performance characteristic at the piece of raising tractive force and deceleration and stopping performance aspect with improvement with best cooperation way.In addition, the structure of pod and translot is guaranteed the wearing and tearing degree of uniformity of each good piece, gets rid of or has under any circumstance limited widely at the peripheral premature wear of piece itself.In addition, the structure of pod and translot is guaranteed to remove water efficiently from ground contact area on wet road surface when tire travels.

By near the shown horizontal protrusion limit 13 rolling surface of piece 2,3 with vertically protrude limit 16 and also help to improve tractive force and deceleration and stopping performance.

On the other hand, should notice that described protrusion limit is positioned in the piece district, by the metamorphosis of elastic portion, related pressure is a gentle relatively value on this piece zone.Therefore, local premature wear phenomenon can not influence by protruding the angle that the limit forms.

Claims (20)

1, a kind of tire of automotive wheel is provided with crown striped (1), comprising:

Polylith projection piece (2,3), all border district of each piece are limited between two pods (4) and two translots (5) at least at least, and this pod circumferentially extends along tire basically, and this translot and described pod (4) intersect:

First group of tire sipe (8) and second group of tire sipe (9), they are at described (2,3) form in, each tire sipe according to respect to the inclined orientation of the direction of outer rolling surface (S) quadrature of crown striped (1), with each piece (2,3) be divided into a plurality of a plurality of elastic portion (10) that circumferentially are provided with abreast, each elastic portion (10) comprises that one goes up acutangulate mounting board limit (10a) on described outer rolling surface (S), it is characterized in that:

Each tire sipe (8,9) is corresponding to the horizontal expansion of a curve extension part along piece (2,3), and described curve extension partly limits the concave surface towards acute angle mounting board limit (10a) deflection of corresponding elastic portion (10).

2, tire as claimed in claim 1, the tire sipe (8,9) that it is characterized in that being positioned at first group and second group is distributed in the corresponding circumferentially row that axially are provided with shoulder to shoulder.

3, tire as claimed in claim 2, tire sipe (8, the 9) row that it is characterized in that being positioned at first group and second group are correspondingly reciprocally with series arrangement alternately.

4, tire as claimed in claim 2, each tire sipe (8, the 9) row that it is characterized in that being positioned at first group and second group are formed in the corresponding row piece.

5, tire as claimed in claim 1 is characterized in that tire sipe (8,9) substantial lateral on its whole width of each piece is extended.

6, tire as claimed in claim 5 is characterized in that each tire sipe (8,9) has the end (9a) of degree of depth reduction at least, and this end (9a) is near the pod (4) that limits relevant block (2,3).

7, tire as claimed in claim 6 is characterized in that each tire sipe (8,9) comprises a part of curve extension basically with respect to the longitudinal centerline symmetry of corresponding piece.

8, tire as claimed in claim 1 is characterized in that each described elastic portion (10) has the bearing of trend deflection of an end (10b) with respect to corresponding pod (4) at least, to limit the side serrations that drops into pod (4) in described (2,3).

9, tire as claimed in claim 1, it is characterized in that each described translot (5) is limited between translot first side (11) and translot second side (12), this translot first side basically with outer rolling surface (S) quadrature of crown striped (1), translot second side (12) is extended from translot first side dividually to rolling surface itself.

10, tire as claimed in claim 9 is characterized in that described second side (12) rolling surface (S) relatively, the direction unanimity of the tire sipe (8,9) of direction and relevant block (2,3).

11, tire as claimed in claim 9 is characterized in that near described rolling surface (S) each piece (2,3) has at least a horizontal edge (13) to protrude to corresponding translot (5), to limit an otch (13a) that has second side (12) of translot itself.

12, tire as claimed in claim 9 is characterized in that each described translot (5) is along parallel with the bearing of trend of tire sipe (8,9) basically direction extension.

13, tire as claimed in claim 9, the translot (5) that it is characterized in that being positioned at piece (2,3) is provided with continuously, extends according to waveform so that limit continuous basically translot (7), and this piece axially is provided with mutually shoulder to shoulder.

14, tire as claimed in claim 9, it is characterized in that each described pod (4) is limited between pod first side (14) and pod second side (15), this pod first side basically with rolling surface (S) quadrature, pod second side is separated along the direction of rolling surface itself from pod first side (14).

15, tire as claimed in claim 14 is characterized in that near each described rolling surface (S) has a longitudinal edge (16) at least, and this longitudinal edge protrudes towards corresponding pod (4), has the otch of pod second side (15) with qualification.

16, tire as claimed in claim 14 is characterized in that in each described pod (4), and the mutual alignment of pod first and second sides (14,15) is oppositely directed in abutting connection with pod first side of pod (4) and the mutual alignment of pod second side relatively circumferentially.

17, tire as claimed in claim 1, it is characterized in that described pod (4) be provided with continuously in case limit continuous basically circumferential slot (6,6a).

18, tire as claimed in claim 17, it is characterized in that each described pod (4) relatively tire a diagonally extending circumferentially arranged so that described circumferential slot (6,6a) press the broken line extension.

19, tire as claimed in claim 1, it is characterized in that being provided with at least the circumferential edge block (2) of two row, this piece (2) extends near the relative side of crown striped (1), and the equatorial plane (X-X) the symmetry placement of tire relatively of one or more circumferential middle column pieces (3), the piece that is arranged on equatorial plane both sides correspondingly has correspondingly relative orientation.

20, a kind of method that improves the snow mounting board in tire tread of automotive wheel comprises the following steps:

Make row pieces (2,3), the circumferential bearing of trend of the relative tire of each row piece is limited between pod (4) and the translot (5);

Separating each piece (2,3) by many tire sipes (8,9) is many elastic portion (10), and tire sipe (8,9) radially extends in tire from outer rolling surface (S);

According to the concave on described rolling surface (S) described tire sipe (8,9) is shaped;

Make each tire sipe (8,9) deflection at a certain angle, this angle straight line relative and rolling surface (S) quadrature is between 20 ° and 35 °.

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