Pirelli Tyre S.p.a.

Giuliano Bonaccorsi

Mario Mariani

Luca Bruschelli

Matteo Torchiana

Pierangelo Misani

Motorcycle tire

A motorcycle tyre () has a tread band () comprising a plurality of grooves that form at least part of a tread pattern including a module (T) replicated along a circumferential direction and having a predetermined circumferential length (C). The module (T) comprises a pair of circumferential grooves () arranged on opposite sides with respect to the equatorial plane (X-X) of the tyre (). Such circumferential grooves () extend along the circumferential direction for at least part of said predetermined circumferential length (C) and define between them a central annular portion (A) of tread band () having a void to solid ratio substantially equal to zero and a predetermined axial width (A). The module (T) further comprises a pair of first lateral annular portions (B) arranged on opposite sides with respect to the equatorial plane (X-X) in an axially outer position with respect to said pair of circumferential grooves () and each having a void to solid ratio substantially equal to zero, and a plurality of transversal grooves () arranged on opposite sides with respect to the equatorial plane (X-X), in an axially outer position with respect to said pair of first lateral annular portions (B). The tyre () has a curvature ratio lower than about 0.4.

Motorcycles tyre

A motorcycle tyre has a tread band () comprising a plurality of grooves that form a tread pattern including a module (T) replicated along a circumferential direction of the tyre () and having a predetermined circumferential length (C). The module (T) comprises a pair of circumferential grooves () arranged on opposite sides with respect to the equatorial plane (X-X) of the tyre (). Such circumferential grooves () extend along the circumferential direction of the tyre () for only part of said predetermined circumferential length (C) and define between them a central portion (A) of tread band () having a void to solid ratio substantially equal to zero and a predetermined axial width (A). The module (T) further comprises a plurality of transversal grooves () arranged on opposite sides with respect to the equatorial plane (X-X) at a distance from said equatorial plane (X-X) greater than that of said circumferential grooves () and a pair of first lateral annular portions (B) axially arranged between said circumferential grooves () and said plurality of pairs of transversal grooves (), each of said first lateral annular portions (B) comprising, in a position axially adjacent to the respective circumferential groove (), a respective part (B) of tread band having a circumferential length at least equal to that of said circumferential grooves () and a void to solid ratio substantially equal to zero. The tyre () has a curvature ratio lower than about 0.32.

It is described a motorcycle tyre () intended to be fitted to a wheel of a motorcycle of the 'supersport' segment, comprising an equatorial plane and a tread band extending in axial direction with a given axial development, wherein the tread band comprises a first annular portion made of a first elastomeric material, having a first dynamic shear storage modulus measured at 70° C., and at least one second annular portion made of a second elastomeric material, having a second dynamic shear storage modulus measured at 70° C., different form said first dynamic shear storage modulus measured at 70° C.

Motorcycle tyre

Motorcycle tires

A motorcycle tyre with a low void-to-rubber ratio while providing a stiffness suitable for good performance on dry ground and on track. A tread band with grooves is arranged to provide a draining effect without structurally weakening the tread band. According to one aspect, the tread band has a tread pattern with two pairs of grooves having segments or portions that produce a warming effect when the compound of the tread band is cold. The tread band provides grip to the ground and limited local warming when the compound of the tread band is at the operating temperature or when driving on dry ground, to provide stiffness and readiness of response.

Growing community of inventors

Milan, Italy

Giuliano Bonaccorsi