NOT the typical "Throw Away" bearings. Fully servicable by CBR. Made with SKF aerospace grade silicon nitride ceramic balls with a polymide low friction retainer. Removable seal.
All bearings are fully servicable by CBR. The bearings themselves normally do not where at all. In most cases, a good cleaning and re-grease is all that's needed. In the case that the races are worn or pitted from dirt and grit, the bearings could be serviced with new races for approximately half the cost of new bearings.