Bearings for Chris King DropSet headsets. Chris King made-in-house bearings are designed to last a lifetime and are fully serviceable. We encourage you to service your bearings before resorting to replacement. Bearing service instructions Seal and Snapring kits for DropSet bearings Complete DropSet headsets 41mm Steel - PHS804 (Fits DropSet 3) 41mm Ceramic - PHS805 (Fits DropSet 3) 42mm Steel - PHS806 (Fits DropSet 2 and DropSet 4) 42mm Ceramic - PHS807 (Fits DropSet 2 and DropSet 4) 52mm 45° Steel - PHS808 (Fits DropSet 2) 52mm 45° Ceramic - PHS809 (Fits DropSet 2) 52mm 36° Steel - PHS810 (Fits DropSet 3) 52mm 36° Ceramic - PHS811 (Fits DropSet 3)