61903 LLB C3 - ABEC-5 Radial Bearing (C3 Clearance) - 17mm x 30mm x 7mm sale ACB 3645 CC BO 1-1/8

ACB 3645 CC BO 1-1/8 Angular Contact Black Oxide treated Headset bearing (30

For the correct replacement bearing

This size bearing is also known in the bike Industry by part number:

Moly Disulphide lubricated lower oil seals move freer

This size bearing has been used as a suspension pivot bearing by a number of bicycle brands including Orbea and Niner

61903 LLB C3 - ABEC-5 Radial Bearing (C3 Clearance) - 17mm x 30mm x 7mm sale ACB 3645 CC BO 1-1/861903 LLB C3 ABEC 5 Radial Bearing (C3 clearance) 17mm x 30mm x 7mm A radial bearing generally used as a hub bearing for some front hub designs, bottom bracket bearing for some older square taper BBs, and can be used as a pivot bearing, though the MAX type version of this bearing is better suited for suspension use. This ABEC 5 bearing features deep groove design races, with Grade 10 balls, LLB seals and 90% fill with high pressure water proof grease