Motorcycle tyre , comprising an equatorial plane (X-X) and a tread band having a given axial development (L), wherein: - said tread band comprises a first annular portion (L1, L2) made of a first elastomeric material, having a first dynamic shear storage modulus (G'1) measured at 70°C, and at least one second annular portion (L3, L4) made of a second elastomeric material, having a second dynamic shear storage modulus (G'2) measured at 70°C, different form said first dynamic shear storage modulus (G'1) measured at 70°C; - said first annular portion (L1, L2) being located in a tread band region located at a distance from the equatorial plane (X-X) equal to at least 25% of the axial development (L); - said second annular portion (L3, L4) being located axially inwardly and adjacent to said first annular portion (L1, L2) so as to define a first interface dividing said first annular portion (L1, L2) from said second annular portion (L3, L4) in axial direction; - said tread band comprising a plurality of grooves defining a trend of the void-to-rubber ratio of the tread band at said first interface which increases along the axial development from the first annular portion (L1, L2) to the second annular portion (L3, L4); - the void-to-rubber ratio at said first interface being greater than or equal to 3% and smaller than or equal to 15%; characterized in that - the void-to-rubber ratio trend increases from a minimum value associated with an annular sector of the first annular portion (L1, L2) to a maximum value associated with an annular sector of the second annular portion; said annular sector of the second annular portion (L3,L4) being located along the axial development at a distance from the equatorial plane (X-X) greater than or equal to 20% of the axial development (L) of the tread band . - said tread band comprises a first annular portion (L1, L2) made of a first elastomeric material, having a first dynamic shear storage modulus (G'1) measured at 70°C, and at least one second annular portion (L3, L4) made of a second elastomeric material, having a second dynamic shear storage modulus (G'2) measured at 70°C, different form said first dynamic shear storage modulus (G'1) measured at 70°C; - said first annular portion (L1, L2) being located in a tread band region located at a distance from the equatorial plane (X-X) equal to at least 25% of the axial development (L); - said second annular portion (L3, L4) being located axially inwardly and adjacent to said first annular portion (L1, L2) so as to define a first interface dividing said first annular portion (L1, L2) from said second annular portion (L3, L4) in axial direction; - said tread band comprising a plurality of grooves defining a trend of the void-to-rubber ratio of the tread band at said first interface which increases along the axial development from the first annular portion (L1, L2) to the second annular portion (L3, L4); - the void-to-rubber ratio at said first interface being greater than or equal to 3% and smaller than or equal to 15%; characterized in that - the void-to-rubber ratio trend increases from a minimum value associated with an annular sector of the first annular portion (L1, L2) to a maximum value associated with an annular sector of the second annular portion; said annular sector of the second annular portion (L3,L4) being located along the axial development at a distance from the equatorial plane (X-X) greater than or equal to 20% of the axial development (L) of the tread band . <EOS>