5/16” X 7 Bike Crank Bearings, Replacement Ball Bearing Retainer Cages Set for Bicycle, Crank Bottom Bracket, Mountain or Road Bike, BMX Crankset Kit,Pack of 4

About this item One of the ball bearing retainer sizes (5/16” X 7 balls) for traditional bottom bracket crank service. (Please always measure your original parts to ensure you are ordering the right replacement parts) These bike bearings are sold as pack of 4 pcs. The bike crank bearings are made of high-quality carbon steel material. Bicycle bearings are lubricated for corrosion resistance and long service life. Please still put some lubricant during installation to maximize its service life These bicycle crank bearings cage could also replace loose bearings