Wheel rolling bearing assembly and manufacturing method thereof

摘要

A rolling bearing.assembly for a wheel includes an inner ring member (10) attached to a wheel, an outer ring member (20) having a fitting tubular member (26) fitted into an attachment hole (4) of a vehicle body member (1) at an inboard end, a plurality of rolling elements (33), and a cage (35). The bore diameter (B) of the fitting tubular portion (26) is smaller than the circumscribed circle diameter (C) of the rolling elements (33).