This size bearing is also known in the bike Industry by part number HD446K
This is ideal for pulling bearings from freehubs and hubs that utilize bearing spacers instead of axle stops
This process also provides a secondary advantage of heat treatment making them tougher
F6902 LLU MAX-EA - Flanged
CO 6808 VV - Enduro Zero, Black-Oxide, Ceramic Hybrid, ABEC-5, Radial Bearing (C3 Clearance) - 40mm x 52mm x 7mm sale This size bearing is alsoCO 6808 VV Enduro Zero, Black Oxide, Ceramic Hybrid, ABEC 5, radial bearing (C3 clearance) 40mm x 52mm x 7mm Enduro Zero, Ceramic Hybrid, ABEC 5, radial bearing featuring black oxide treated 52100 High Carbon chromium alloy races paired with Grade 5 Silicon Nitride Ceramic balls with 90% fill, high pressure, water proof grease. Si3N4 ceramic balls reduce bearing wear and increase bearing life by eliminating steel on steel contact within the bearing.