Wheel bearing unit

A wheel bearing unit comprising:

• an outer ring;
• a first inner ring comprising a first axial end face;
• first rolling elements arranged between the outer ring and the first inner ring and guided in a first cage;
• a second inner ring comprising a second axial end face, facing the first axial end face;
• second rolling elements arranged between the outer ring and the second inner ring and guided in a second cage;
• and
• a sealing device for sealing an interface of the first inner ring and the second inner ring, the sealing device comprising:
• an annular retaining element;
• and
• a sealing element provided on the annular retaining element, wherein:
• the sealing element is a sealing ring comprising:
• first and second contact points contacting the annular retaining element;
• a third contact point contacting the first inner ring;
• and
• a fourth contact point contacting the second inner ring;
• and
• at least one of the contact points comprises a flat face.