Bicycle OPC OPC Cold-Forged With pin American ... 152/165/170/175MM HeBei HuaYu Bicycle Co.Ltd is specialized in manufacturing Bicycle crank,hub,chainwheel,brake system ... be our pleasure if we could help you in bicycle parts business .welcome to contact us at your convenience ... . Yours Sincerely HeBei HuaYu Bicycle Co.Ltd Address:Lujia tun industrial zone,GuangZong county ...