Pneumatico per ruote di motocicli

A tyre (1) for motorcycle wheels is described comprising a tread band (8) of the "cap-and-base" type comprising a radially outer portion, formed by a central sub-portion (11a) made with a first vulcanized elastomeric material and by a pair of lateral sub-portions (11b, 11c) made with a second vulcanized elastomeric material, and a radially inner portion (12) made with a third vulcanized elastomeric material. The first vulcanized elastomeric material of the central sub-portion (11a) has a dynamic elastic modulus (E') measured at a frequency of 10Hz and at 23°C greater than the dynamic elastic modulus (E') measured in the same conditions of the second vulcanized elastomeric material of the lateral sub-portions (11b, 11c) and both such vulcanized elastomeric materials have a respective dynamic elastic modulus (E'), again measured at a frequency of 10Hz and at 23°C, comprised between 5.2 and 6.5 MPa and greater than the dynamic elastic modulus (E') of the third vulcanized elastomeric material, measured in the same conditions. In the tyre (1), the ratios R1 and R2 between the dynamic elastic modulus and the tandelta of the second vulcanized elastomeric material of the lateral sub-portions (11b, 11c) of the radially outer portion and the dynamic elastic modulus and the tandelta of the third vulcanized elastomeric material of the radially inner portion (12) of the tread band (8), respectively measured at a frequency of 10Hz and at 100°C and at a frequency of 10Hz and at 70°C, are comprised between 0.8 and 1.2.