Motor vehicle wheel disc has radial arms embossed with lengthwise cavities for increased strength

摘要

The wheel disc, made from pressed sheet metal and having an outer ring (4) joined to the wheel rim (2) and an inner ring (5) with holes (52) for hub fixing studs, has radial arms (6) connecting the inner and outer rings embossed with lengthwise cavities to give them greater strength. Each cavity extends from a part of the inner ring with a fixing hole to the outer ring. At the inner ring end the arm has a bridge that is offset axially outwards.