SKF Ball bearing 6204 e.g. for rear wheel drive at ETZ250 : Amazon.de: Automotive
NTN Bearing 6204Z Single Row Deep Groove Radial Ball Bearing, Normal Clearance, Steel Cage, 20 mm Bore ID, 47 mm OD, 14 mm Width, Single Shielded: Amazon.com: Industrial & Scientific
NTN Bearing 6204ZZ Single Row Deep Groove Radial Ball Bearing, Normal Clearance, Steel Cage, 20 mm Bore ID, 47 mm OD, 14 mm Width, Double Shielded: Amazon.com: Industrial & Scientific