Silica-filled elastomer composition which can be used for tires

A tire tread having a base of a coupled and/or starred diene polymer, characterized by the fact that it comprises 10 to 100 parts by weight of a sulfur-vulcanizable rubber composition comprising silica as reinforcing filler and a coupled and/or starred polymer comprising 30% to 100% of chains coupled and/or starred by means of an agent having the general formula:

• (Y)m—R1—Si(OR2)3−n—R3n in which
• Y represents the radical
• R1 represents an alkyl, cycloalkyl or aryl radical having 1 to 10 carbon atoms,
• R2 represents a methyl or ethyl radical,
• R3 represents an alkyl, aryl or alkaryl radical having from 1 to 12 carbon atoms,
• R4 represents a hydrocarbon radical having from 1 to 6 carbon atoms and may comprise one or more oxygen atoms in the hydrocarbon chain,
• n is whole number selected from among the values 0 and 1,
• m is whole number selected from among the values 1 and 2,
• p and q are whole numbers selected from among the values 0, 1, 2, 3, and 4, it being understood that the sum of p+q must represent a whole number between 2 and 5 inclusive.