Pirelli Tyre S.p.a.

Pirelli Pneumatici S.p.a.

Roberto Bolzoni

Diego Ettore Speziari

Gianfranco Colombo

Stefano Montesello

Daniele Lorenzetti

Stefano Bizzi

Giovanni Casarotto

Anna Paola Fioravanti

Alessandro Ascanelli

Maurizio Boiocchi

Roberto Sangalli

Giulio Lorenzo Dupre'

Mario Secchi

Giulio Lorenzo Dupre′

Dario Scaltritti

Andrea Scotti

Alberto Abondio

Alberto Maria Putti

Damiano Leonardo Belluzzo

Giulio Lorenzo DuprÉ

Werner Liesch

All season tire

Car tire

High performance tire

A tyre having a tread is described. The tyre has a central portion located across an equatorial plane, a first shoulder portion located towards an outer side of the tyre and a second shoulder portion located towards an inner side of the tyre. The central portion is separated from the first shoulder portion by two first circumferential grooves. The first shoulder portion and the second shoulder portion have a plurality of first transverse grooves having a first end located substantially at the respective edge of the tread, having a width greater than or equal to about 4 mm and an axial extension equal to at least 50% of the width of the shoulder portion in which they are located.

Car tyre

Tyre () for all-terrain vehicles having a tread band () comprising: —a central annular portion (A), located across the equatorial plane (X-X), and two shoulder annular portions (A, A), separated from said central annular portion (A) by two circumferential grooves (); said central annular portion (A) having at least one circumferential row () of central blocks, comprising a plurality of central blocks (), and at least two rows () of lateral blocks, opposed to each other relative to said at least one circumferential row () of central blocks, and comprising a plurality of lateral blocks (), wherein —said central blocks () have a first and a second portion () located opposite to each other relative to the equatorial plane (X-X); —said central blocks () and said lateral blocks () have a circumferential dimension greater than 2% of the development extension of the tread of the tyre; —said lateral blocks () have an elongate portion () and a head portion () located at an end of said elongate portion (); said elongate portion () having a dimension SI in axial direction and said head portion () having a dimension Sin axial direction, where S>S; —the elongate portion () extends according to an extension direction forming an angle α relative to the equatorial plane comprised between 0° and 30°; —said elongate portion () has an axially outer lateral wall () facing one of said circumferential grooves () and an axially inner lateral wall () facing one of said first and second portions () of the central blocks (); —said head portion () has a first transverse wall () located so as to form with said axially inner lateral wall () a concavity which points towards the equatorial plane (X-X) and is such that the first or the second portion () of the central block () being subsequent in axial direction faces said concavity and is at least partially surrounded by said axially inner lateral wall () and by said first transverse wall ().

Tire

A car tyre having a tread that extends in axial direction for a width the tread including a central portion arranged across an equatorial plane, and two lateral portions opposed with respect to the central portion. The central portion is separated from the lateral portions of the tread by two circumferential grooves. The circumferential grooves have a width greater than about 6 mm. The central portion extends in axial direction for a width less than 20% of the width of the tread and includes a plurality of first sipes. Each lateral portion has a width greater than 30% of the width of the tread, and each lateral portion includes, furthermore, a plurality of transversal grooves. The transversal grooves of a lateral portion include at least a first inclined length that extends from a zone proximal to the respective circumferential grooves, moving away from the equatorial plane. The first inclined length has an inclination &#x3b1;&#x2264;60&#xb0; with respect to equatorial plane. Each lateral portion includes a plurality of sipes. The density of the sipes decreases moving away from the equatorial plane.

Tire for vehicle wheels

Growing community of inventors

Milan, Italy

Roberto Bolzoni