A tyre with improved grip on wet ground, the tread of which comprises a rubber composition comprising at least(parts by weight per hundred parts of elastomer): - 50 to 100 phr of a styrene- and butadiene-based copolymer, in particular a styrene-butadiene (SBR) copolymer; - optionally, 0 to 50 phr of another diene elastomer, such as, for example, a polybutadiene or natural rubber; - 100 to 150 phr of a reinforcing inorganic filler such as silica; - and a plasticizing system comprising: - in an amount A of between 10 and 60 phr, a thermoplastic hydrocarbon-based resin which has a Tg above 20°C; - and in an amount B of between 10 and 60 phr, a liquid plasticizer; - it being understood that the total amount A + B is greater than 50 phr, preferably between 50 and 100 phr.