Tire with tread having an intermediate rubber layer containing a microsphere dispersion

摘要

The invention relates to a tire with a tread having an intermediate rubber layer (6) which contains a dispersion of high strength hollow microspheres, preferably glass and/or ceramic microspheres. In particular, such tire tread is comprised of at least three radially disposed zones of rubber layers composed of a radially outer tread rubber cap layer (4), a radially inner tread base rubber layer (5) and an intermediate, transition rubber layer (6) positioned between said outer rubber cap layer and said inner rubber base layer. The intermediate tread rubber contains a dispersion of glass and/or ceramic microspheres together with a coupling agent.