A motorcycle tyre of the block pattern type wherein the tread comprises two layers of the tread compound the inner part (2,5) containing at least 40 parts by weight synthetic polyisopene rubber or natural rubber and having a complex modulus (E*) in the range of 100 to 300 kg/cm and the outer part (3,4) containing more than 50 parts by weight of styrene-butadiene copolymer and the base of the tread grooves being radially inwards of the radially outermost parts of the boundary between the two tread compound parts.
