PNEUMATIC TIRE PROVIDED WITH A MULTI-LAYERED TREAD AND PROCESS FOR ITS MANUFACTURE

摘要

A pneumatic tire (1) comprising a carcass structure (2) with at least one carcass ply (2a), at least one annular reinforcing structure (3) associated to the carcass structure (2), a belt structure (5) and a tread band (6) made of an elastomeric material at a radially outer position with respect to the carcass (2) and belt structure (5), wherein the tread band (6) includes at least one radially inner layer (9) and a radially outer layer (10) apt to roll on the ground and wherein: i) the radially inner layer (9) has a modulus of elasticity (E') under compression greater than the modulus of elasticity (E') under compression of the radially outer layer (10); ii) the radially inner layer (9) of the tread band (6) comprises a plurality of circumferential abutment elements (12) radially extending in the radially outer layer (10) and axially distributed along the transversal development of the tread band (6).