A tire intended to equip a vehicle bearing heavy loads is provided. The tire includes a tread having at least one rubber composition based on at least:one elastomer matrix comprising at least one modified copolymer at a content greater than or equal to 51 phr, the modified copolymer having a glass transition temperature Tg above −65° C. and below or equal to −30° C. and being composed of a copolymer based on styrene and based on butadiene functionalized in the middle of the chain with an alkoxysilane group linking the two arms of the copolymer via the silicon atom which bears an amine function bonded directly or via a spacer group to the silicon atom,a reinforcing filler,a chemical crosslinking system,an agent for coupling, anda plasticizing system comprising from 2 to 15 phr of at least one plasticizing resin.展开▼
