A rubber composition for tire treads having improved rolling resistance and wet road braking performance, comprising a chlorinated butyl rubber and a brominated butyl rubber, natural rubber and a polyisoprene rubber and, if desired, {HEAD ~ a polybutadiene rubber} in {TAIL ~ specific blending ratios} 
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A rubber composition for tire treads having improved rolling resistance and wet road braking performance , comprising a chlorinated butyl rubber and a brominated butyl rubber , natural rubber and a polyisoprene rubber and , if desired , { HEAD ~ a polybutadiene rubber } in { TAIL ~ specific blending ratios }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL