Front wheel hub for spokes, for Delta and Fermer. The spokes are attached to it, and on the axle it rotates on bearings.
Replace it if the flanges are cracked or deformed, or the spoke holes are worn out. When replacing, check the bearings and tension the spokes correctly. When buying, compare the markings on the old bearing: they define the size unambiguously. Press the new bearing in by the outer ring, without striking the cage or the inner ring.
