The wheel cover for attaching automobile wheels is made of polypropylene containing 20.about.67 wt. %, thermoplastic elastomer containing 3.about.30 wt. % and acicular calcium silicate containing of 30.about.50 wt. %. The acicular calcium silicate is preferred with a filler orientation index that is less than 1000 and has average particle sizes between 1 and 100 .mu.m. The polypropylene resin is high crystallization block polypropylene resin which contains 3.about.12 wt. % of ethylene ingredient. Heat deformed temperature (455 kPa) is more than 125 centigrade degree. It is preferred that the Melt flow index is more than 300 g/10 min.