FIELD: transport.
SUBSTANCE: invention relates to automotive industry. Tire ledges to create turbulent flow extend from circle inner side to outer side are spaced apart in tire circumference on tire bead surface. Said led has edge part shown at cross-section in radial direction. Front wall angle formed between ledges whereon air flow blows up and tire surface makes 70-110 degrees. Bead reinforcing rubber represents a rubber mix. Said mix is produced by blending of 100 parts by weight of rubber components containing 10 wt % of diene-based modified polymer. Said polymer is produced by modification reaction between diene-based polymer end group and alkoxysilanes compound with primary amides or precursor that can produce primary amides at hydrolysis.
EFFECT: longer life, longer run at flat tire.
24 cl, 11 dwg, 4 tbl
