Antrader Bike Ball Crank Bearing,12 Pcs 29mm x 9 Ball Bearings Cages Crank Bearings Wheel Bearing Retainer for Bicycle Ball Bearings for Bike Crank Bottom Bracket

About this item You will Get 12 Pcs ball bearing retainer. This ball bearing retainer made of steel,durable and high intensity. Outer Diameter 29mm/1.14″; Inner Diameter 18mm/0.71″. This ball bearing retainer with 9 balls. Can be used in ordinary bicycles, mountain bikes, stretch bicycle, kids bike,ect.