One of the common bike ball bearings retainer size usually for front hub with 5/16 axle. Please verify the size you required before purchasing.
Our bike wheel bearings are made of high-quality carbon steel material.
Lubricated for corrosion resistance and long service life. Please still put some lubricant to bicycle ball bearings during installation to maximize its service life
These bearing cage could also replace loose bearings
The bicycle wheel bearings are sold as pack of 4 pcs.