A motorcycle tyre comprising: a tread portion having a ground contacting surface ; a carcass ; a breaker layer disposed outwardly in a tyre radial direction of the carcass in the tread portion , the breaker layer comprising one or more breaker plies having a plurality of cords oriented at an angle equal to or more than 15 degrees with respect to a tyre equator (C); and a tread rubber disposed outwardly in the tyre radial direction of the breaker layer so as to form a band-less structure in which the tread rubber is arranged so as to be directly in contact with the breaker layer in the tyre radial direction, wherein the tread rubber comprises a cap rubber layer forming the ground contacting surface of the tread portion , and a base rubber layer disposed inwardly in the tyre radial direction of the cap rubber layer and having a complex modulus greater than that of the cap rubber layer , the base rubber layer extends between a pair of outermost ends thereof so as to cross the tyre equator (C), and a thickness (ta) of the base rubber layer at the tyre equator (C) is greater than that of the outermost ends , characterized in that a width (Wb) in a tyre axial direction between the outermost ends of the base rubber layer is equal to or more than 60% and equal to or less than 80% of a tread width (TW) between tread edges (Te) in the tyre axial direction. a tread portion having a ground contacting surface ; a carcass ; a breaker layer disposed outwardly in a tyre radial direction of the carcass in the tread portion , the breaker layer comprising one or more breaker plies having a plurality of cords oriented at an angle equal to or more than 15 degrees with respect to a tyre equator (C); and a tread rubber disposed outwardly in the tyre radial direction of the breaker layer so as to form a band-less structure in which the tread rubber is arranged so as to be directly in contact with the breaker layer in the tyre radial direction, wherein the tread rubber comprises a cap rubber layer forming the ground contacting surface of the tread portion , and a base rubber layer disposed inwardly in the tyre radial direction of the cap rubber layer and having a complex modulus greater than that of the cap rubber layer , the base rubber layer extends between a pair of outermost ends thereof so as to cross the tyre equator (C), and a thickness (ta) of the base rubber layer at the tyre equator (C) is greater than that of the outermost ends , characterized in that a cap rubber layer forming the ground contacting surface of the tread portion , and a base rubber layer disposed inwardly in the tyre radial direction of the cap rubber layer and having a complex modulus greater than that of the cap rubber layer , the base rubber layer extends between a pair of outermost ends thereof so as to cross the tyre equator (C), and a thickness (ta) of the base rubber layer at the tyre equator (C) is greater than that of the outermost ends , characterized in that a width (Wb) in a tyre axial direction between the outermost ends of the base rubber layer is equal to or more than 60% and equal to or less than 80% of a tread width (TW) between tread edges (Te) in the tyre axial direction. <EOS>